Hx711 unstable readings I previously had the load cell calibrated and functioning, but now the load cell will not read any values; only 0's are outputted, even when I apply a small load to the sensor. Over time, the value drifts In this 24-bit ADC I have observed that making repeated raw readings with scale. This chip has I'm currently working with a Load Cell S-Type. im getting readings without sprite implementation correctly but i have a flickering that i want to avoid,i tried to incorporate on my code some sprite code as good as i could from the examples but im Getting no readings,just a I can live with a 1 or 2 second delay for an accurate reading but 5 to 7 is too much. The measured weights of the dinamometer are supposed to be transfered to the PC and just displayed. Remember that this is reading voltage so the fact that the number the sensor is putting out varies isn't a big deal and from the readings you posted it's actually pretty consistent. bin This is the component for a digital scale, sparkfun has some pictures. begin(9600); Serial. Because I will put a beehive on my bord with hx711 and load sensors, I need to read values at anytime without lifting beehive from a board. Waits for the chip to be ready and returns a reading. 10: 5491: May 6, 2021 ADXL with HX711. I am using it with bodge's code (HX711Serial) as well as his library (GitHub - bogde/HX711: An Arduino library to interface the Avia Semiconductor HX711 24-Bit Analog-to-Digital Converter (ADC) for It seems that you may need to change the two red wires going to A+ and A- on the HX711 if you only get a reading of 0kg. println("HX711 calibration Hi I have made a weigth with 4 loadcells + hx711 + wemos / ESP8266 Everyting uploads and works, I can calibrate and I get correct values. HX711 chip I pulled the HX711 chip out of this set that came with a load cell (that I didn't use). I measure coins, I have to know the coin weight to determine how many of them on the load cell. h> //SetHX711 pins #define DOUT 3 #define CLK 2 Thought I'd share results of tests I did on two HX711 boards using a barebones Arduino and different I also take a temperature reading. Unstable Readings from HX711 + 4 load 50 KG Load cells. I have a spare hx711 breakout and will try to make a modification to the excitation power line like this. - phurin-git/python-hx711 Hey all, Try to make this as succinct as posable. I read, that the green HX711 boards do not have a connection between E- and GND (i checked that, my boards didn’t), so i connected them. 137149 WARNING:root:setting gain and channel took more than 60µs. No matter what I do, the value from the load sensor never steady--in fact, when I put any weight on it at HX711 Pin Configuration. I'm using HX711 lib from: GitHub - bogde/HX711: An Arduino library to interface the Avia Semiconductor HX711 24-Bit Analog-to-Digital Converter I'm using 4 load cells with an HX711 and a load combinator and for the life of me I can't get any scale readings. To troubleshoot this issue, start by checking the wiring connections to ensure they Hey guys, I just started a project to make a simple weight scale, so I went ahead bought a 1kg load cell with HX711. Divide the result in step 3 to your known weight. We are using an HX711 with our own combiner circuit design for a 6 wire load cell (7 with shield) and 4 load cells on a 24/7 propane kiosk. 8. i want to send the sensor data (i used load cell and HX711) to blink app our in any other app or website where i can stored the runtime data. Hi everybody, I am working on a project, which objective is to find the force applied to a point at a carbon fiber wing bar. Not finding any appropriate libraries to get weight reading from the HX711 via the FT232H, I attempted to hack together something in Python 3 to pull readings from the HX711. Returns Raw ADC reading . The aim of the project is to measure vacuum pressure to control a vacuum pump such that it is switched on and off according to a predetermined logic so that the pressure remains I have this Load Cell Amplifier and load cell 0,01 - 300g, but I couldn't figure out how to mesure small things. I use them from home automation to measure bed presence. JPG 1512×2016 528 KB. I need it to not drift - I assumed that a load cell worked in a way where I could tare Edit: Im using a MKRZero(p1am-100) so I have a Load cell attached to an HX711 and am wondering if the HX711 does averaging internally because despite having a delay of 250ms Dreded changed the title Does the HX711 Do Averaging itself? Can't Get Readings Faster than 450ms Nov 4, 2021. I don't think that regulated supply can power more than four load cells. A Python library for interfacing with the HX711 load cell amplifier. As read, the connection is also good for stability reasons. h" byte c_hacek[8] = { //definice znaku c I would start by giving the HX711 a stable signal on the order of your load cell (probably a few mV) using a voltage divider, and see if it stabilizes or if it still does the same thing. UKHeliBob December 27, 2019, 12:25pm 2. power_up() It looks like your wiring is correct, but the constant output (167772. The below wiring specified 5v and after changing to that, I’m now getting [12:37:59][D][hx711:031]: 'Bed Sensor': Got value 0 [12:37:59][D][sensor:121]: 'Bed Sensor': Sending state 0. I have 4 load cells and have connected 4 HX711 modules (one to each load cell) and have connected them to the arduino uno. 2: Hello guy, I'm trying to interface hx711 adc with pi16f877a. Are you powering the HX711 from 3. Unstable or fluctuating readings: Ensure that the load cell and HX711 module are properly grounded and shielded from external noise sources. Programming Questions. Leo HX711 with a 20kg load cell - working with a NodeMCU 32. Pinout diagram shows the pin assignment of each pin. The readings that I obtained is not that accurate so I want to get the average of 5 readings. My issue is that I can't get constant readings in the serial monitor and I'm not sure if my coding is right or if I did the right setup. I'm reading the weight value using HX711. Because beehive is on remote location without electricity I will use 9V battery and ON/OFF switch. I have 2 identical scales, both have the green HX711 and Bosche H30A. Can someone please explain to me (in truck hx711 unstable readings with 4 load cells. This extension allows you to use an HX711 module with the micro:bit as Hi all, I'm using a 5-wire, 1000lb Optima-312 load cell with a SparkFun HX711 and a RexQualis Mega 2560 Arduino but no matter what I do I can't get a reading/calibration after trying many different code libraries. py scripts. py # 2018-03-05 # Public Domain CH_A_GAIN_64 = 0 # Channel A gain 64 CH_A_GAIN_128 = 1 # Channel A gain 128 CH_B_GAIN_32 = 2 # Channel B gain After reading the tips, I re-soldered them to be as short as possible to try to eliminate issues. 5 g+- 1. It needs the pigpio daemon to be running (sudo pigpiod). Not sure. code: #include <LiquidCrystal_I2C. #!/usr/bin/env python # HX711. Whenever I run the calibration example sketch from the library my each iterations yeilds different calibration factor. The strain gause has it's own display When I'm using the system on a test bench, the readings of the HX711 are rock stable. Using the basic hx711 example code to test the modules, I do get values from the Helllo, I am using load cells in my research project. 15) suggests an issue with calibration or gain settings. The 5Kg load cell is located very near my breadboard and I don't think there is a temperature difference. begin (38400 i thought about your comment . I'm planning to measure weight with an Arduino Due, With loadcell specifications input voltage from 5-12V, has 4 wires, 2 for source and 2 for output voltage. 3kg after zeroing the scale) but I am making a custom load cell for work. please send me Hello everyone, So i'm doing a weighting scale project, and i hooked up a 5kg load cell to hx711, but i'm having a problem. Call HX711_set_scale(1. Over time, the value drifts away and the device needs to be tare'd again. I am using the function scale. Log in or register to post comments; Submitted by Jaden on Tue, 06/27/2017 - 00:46. I'm using the "HX711. Key Features The strain gauge is connected to the Sparkfun Hx711 Load Cell Amplifier which is connected to a Raspberry Pi 3B+. One is working as intended; however, the other is giving either extremely delayed or very, very inaccurate readings, and more often than not gives both. 0 g) and the mean decreases by 1 or 2 g. This is conveniently assembled and package in the M5Stack WEIGHT module. Hello everyone , I used HX711 ADC module with Arduino IDE in that i used HX711 Arduino Library → In that i used this code for measure weight. Hi all, I have 4 half bridge load cells (See attached to see a picture of one), a HX711 and an Ardunio and I want to make a weighing scales (it will update a google sheet with my weight as I'm planning on losing a few pounds :)) I have done a fair amount of research (as my electrical knowledge is next to nothing at this point) and I think i want a to make a Wheatstone Hello, I'm using a board that operates at 3. Most available HX711 modules seems to follow the reference design, but be aware that some modules are poorly designed with under-sized capacitors, and noisy readings. I had a look around at different schematics and found this one on the HX711. Let's say 15. I'm a mechanical engineer so electronics and coding are not my strong points at all. 2: 759: May 6, 2021 HX711 and load cell not working with Arduino Uno. I had a little play with one and got very unstable readings, so i Unstable measurements (HX711 and STM32) Questions &/or issues related to products in the Flex / Force category should be posted in this forum. For one, the I am using the HX711 load cell amplifier to amplify my 500g strain gauge signal. I have checked and compared the wiring and the code between the two and cannot find Hello, I have a problem with my project with weight cell loads. I am using it with bodge's code (HX711Serial) as well as his library (GitHub - bogde/HX711: An Arduino library to interface the Avia Semiconductor HX711 24-Bit Analog-to-Digital Converter (ADC) for Hi there, I'm using a load cell (TAL220 10kg) and a HX711 with an Arduino to measure weight. hx711. In both cases, i used the power supply for HX711 at 3,3V Hello guys! Im trying to implement sprites on my project to avoid flickering of the screen on my measurements,i tried my best but this does not go anywhere. IMG_1458. For robots, unstable and noisy readings are not suitable as they will not work well or will not do the desired task. I am experiencing a unstable reading in weight varies more then 20g up Would you recommend to use the HX711 for a series production? Your selected excitation voltage has very little margin for tolerances and headroom for the regulator (175mV drop nominal). ) I suspect one or multiple wires has a broken connection. I have calibrated using the provided calibrate. When asked to place a known mass on the load cell and enter its weight, the code confirms the known weight I entered but says the calibration weight is I am trying to connect two load cells to raspberry pi 3 using HX711 24-bit ADC. Starting my summary from a hardware side, as I am pretty sure this is core to the problem. You signed out in another tab or window. Hi, i'm trying to calibrate my load cell to get the right weight. I include the circuit diagram and the code I have written They should have used a HX711 board from Sparkfun, which has two supply connectors. Call `tare()` with no parameter. (in wheatstone bridge configuration, rated at 50kg each). Also the weight it displays keeps on toggling in the small amounts (after the decimal point) I have mounted my loadcell on the edge of the table with G clamp and the I don’t know what HX711 board you’re using, but if you have the update rate on your HX711 set for 80SPS, try setting it for 10SPS. Hi all, this is ,my first time working with EPS32s and ESPHome. But when weater is not so kind, below 15 degrees celsiur or is humidity over 70% then magic begins. Call `set_scale()` with no parameter. 2- built an isolation chamber connected to ground so to test if If you getting readings at the limit of the HX711, (2^24=16777216) the load cells might not be close enough to identical, and you might have to Currently the scale is unusable, because the is so much fluctuation in the values. read_average() m is your slope (multiplier) b is your intersection (offset) - also from scale. When the sensor is not moving, I will get a jump of 1 volt at random times. 00 get units: 4217341. Basically, we are making a pair of scales. The extra time the HX711 spends sampling the load cells will translate into smoother readings. 5 to 0. I had an idea to measure the amount of water left in my watercooler based on weight. In my case, it drifts from 0. One 5volt connector to power the 4. h file For calibration and storing the calibration value in eeprom, see example file "Calibration. 25volt regulator for the load cell, and a separate connector to power the logic part of the HX711 I have four HX711 cells in a Wheatstone configuration. When I take the load of the load cells and add the same load again (61,9kg) I now got new values. 3 lbs calibration_factor: Hello No i Use A0 and A1 and i try this sketch but no result This is the same problem. md", except the initial calls (to establish the "tare") are with zero differential voltage, and the Hi, I am doing a project to measure the weight of an object by using ESP32 and load cell. What should I do? need help please. temperature Hello, This is my first Arduino project. Sign up for free to join this conversation on Arduino HX711 Description: Arduino HX711 and Load cell weight measurement and calibration-In this article, you will learn how to use a 5kg load cell with HX711 amplifier board and Arduino Uno or Mega. - RobTillaart/HX711. The HX711 chip uses an external PNP transistor to make a stable 4. h library from here H20A load cell Uploading this sketch #include "HX711. Hx711 manufacturer suggest pins D2 and D3 instead however I was under the impression that any digital I/O pins After it, we have created the below function for reading data from the HX711 module and return its output. Creep I am using an Arduino Uno and HX711 amplifier to collect data from a load cell. Connected as follows: Lower/unstable exitation voltage is lower/unstable load cell output. Check the continuity between E- on one side and ground on I have developed a project with an ESP8266 and 4 HX711 ADCs to control four scales, each with four strain gauges. I have made a Wheatstone bridge using strain gauge of 350 ohm and 3 resistor of 330ohm and 3 resistors of 20 ohm. After creating the bridge and making connection to the HX711 and Arduino i am getting zero value. hackaday. void setGain Hi folks, I try this setup for doing this project: Arduino: 1. 03 I'm working on a capstone project for high school and am using HX711 load cells. 1: 669: May 6, 2021 Need help with counting scale project. includes Force Sensitive Resistors, Load Cells & Amplifiers, Pressure Sensors, etc Edit: Im using a MKRZero(p1am-100) so I have a Load cell attached to an HX711 and am wondering if the HX711 does averaging internally because despite having a delay of 250ms Dreded changed the title Does the HX711 Do Averaging itself? Can't Get Readings Faster than 450ms Nov 4, 2021. Viewed 2k times I'm using a 10kg loadcell with HX711 module with library HX711_ADC with arduino uno. To this device, I have connected: 1. 20 reading -3088. →I want to store current values on HX711 is a precision 24-bit analog-to-digital converter (ADC) designed for weight scales and industrial control applications to interface directly with a bridge sensor. HX711 ADC Simultaneous data reading from both channels. Reading a lot here i saw that some users had issues with green ones (i already bought) some of these. Still cannot seem to get the reading to be accurate any faster. Red E+ Black E-White A- (or B-) Green A+ (or B+) From the HX711, GND and VCC were connected to GND and 5V from the Arduino UNO. There is something with the stalker board that doesn’t tick correctly here. Determine the tare value of the load cell by averaging times raw readings. h */ /* This example file shows how to Abstract: This article discusses a common issue encountered during the development of a FOSS coffee scale using the HX711 ADC. On a rainy day we would expect from -0. In serial monitor i read correct for a short time, then it gets giberish Picture under 1: After tare then with no load it changes after some time (30 sec) to: Code from example library HX711_ADC. 14: 2263: June 28, 2022 Load cell and hx711 read 0 all the time. Currently using: HX711 Sensor Wemos D1 Mini 4 Load cells connected in wheatstone bridge I’ve tried hooking them up in different ways and experimenting with the sensor, YAML, firmware but could never get accurate readings. Pin#01: VSUP. I connected the load cell to HX711 as recommended by this post. ı using sparkfun tutorial below link "Load Cell Amplifier HX711 Breakout Hookup Guide - SparkFun Learn". Basically, figure out which parts of your system work or not. DOUT - pin #A1 // HX711. If the readings from the HX711 are opposite of what you are expect (for example the values decrease as you increase weight) simply reverse the O+/O- wires. I measured the resistance across all the pins, but they seem incorrect. 5v supply pin – seems the hx711 works better at lower voltage. 0 lbs. When I take the load of The 0 resistance reading from E- to E+ (and A- to E*) looks very suspicious. This project demonstrates how to use an ESP8266 microcontroller, an HX711 load cell amplifier, and an SSD1306 OLED display to create a simple weight scale. I am using two strain gauges BF-350, 2 resistances (330ohms), arduino and a HX711. As you can depict from pinout that it has two ADC channels and each channel converts an analog signal into a 28-bit long digital value. I recently conducted tests using a 5 kg load cell and applied standard weights while measuring the voltage across the strain gauge for each weight. If anyone can figure out if I am doing something wrong here is my code: // This Can you point to anything in the HX711 datasheet that says it is I2C 350 ohm strain gauge + HX711 zero reading. Initially, you’ll become familiar with the necessary Hello, I have sucessfully calibrated my HX711 sensor and everything is working OK so far. #include "HX711. To troubleshoot this load cell problem, you might take temperature readings at different times, and shield the equipment from the sun if it causing dramatic temperature shifts. SCK and DT were connected to digital pin from 9 to 2. I read that there is a shutoff mode where the HX711 go in low power mode after the CLK stay high for a given period. 2Grams over time(for around 2minutes stays there and then fluctuates around 0. It can be used with any microcontroller with a two-wire interface, such as Arduino, Raspberry Pi, or ESP32. I have : Genuino Zero HX711 from Sparkfun : datasheet Weight cell load : datasheet I just want to know the weighton the sensor. Connect E- of HX711 Module with Left Node of WS Bridge Connect A+ of HX711 Module with Bottom Node of WS Bridge Connect A- of HX711 Module with Top Node of WS Bridge 3. 1- tested the hx711 module and load-cell and i know they work fine and have no problem. Some of the load cell wires are connected together to form a ("HX711 calibration sketch"); Serial. With some of these, just waving your hand near the board is enough to change the reading significantly. 12: 11865: November 15, 2021 HX711 and Quarterstone Bridge Unstable Readings. 2: 857: May 5, 2021 Weight scale with GSM capabilities - guidance and improvements needed. - bogde/HX711. 3volt E+ excitation voltage. Then I use two of the lines to "correct" the weight reading to 65 deg F (e. from that i was able to get raw readings from the hx711, i am using mikroC complier. When we remove the weight bag from the strain gauge Arduino should make a ledger in sd card and enter the entry Hello everyone, I am trying to make a scale with a 5kg load cell and a HX711 amplifier. My setup is an Arduino Due connected to 13 HX711 ADCs to run 13 load cells to measure tension in lines. But the problem is because is just reading zero´s. The author shares their experience with unstable readings caused by a USB power source and proposes a solution. Leo. You could also try taking more readings and averaging them out. 4 (Mac OS X) Board: "DOIT ESP32 DEVKIT V1 HX711 load cell amplifiyer hx711. It seems that you may need to change the two red wires going to A+ and A- on the HX711 if you only get a reading of 0kg. h> #include <LiquidCrystal_I2C. What could explain this? In both situation, my multimeter reads 3. I would like to measure a weight in grams and I have used this code to get weight: /* Example using the SparkFun HX711 breakout board with a scale By: Nathan Seidle SparkFun Electronics Date: November 19th, 2014 License: This code is public domain but you buy me a beer if you use tl;dr HX711 works fine until a noisy force input is introduced at which point all the readings go negative. h" Arduino library to read the values. Project x is the raw value from the HX711 - from scale. For testing, I have attached the strain gage to a piece of aluminum which is easily deflected by All good reading. The base code I'm using is below. The hx711 is an electronic module used to measure load cells. Sensors. I have a simple setup, (check attached photos, nvm the resistors on the right of the 2nd photo!). 5: 1905: March 1, 2022 Arduino library for HX711 24 bit ADC used for load cells and scales. Works for both native and easyC. Hello, i have a problem with the half bridge load cell reading. The ESP8266 might need 3. Divide the result EDIT: I did some further reading and it turns out that the bridge is in fact closed, but the thin connection between the pads is covered with the red coating. The cable distance from the load cell to the combiner was at least 5 feet. h> ; I get stable readings. Does anyone know what I am doing wrong? Thank you in advance! Hi all, have read quite a bit about the HX711 in combination with a Wemos D1 mini, but haven't really gotten anywhere yet so looking here for support. I am using a load cell which has been calibrated for giving torque given a mV/V value. h> LiquidCrystal_I2C lcd( 0x27, 20, 4 ); #include "HX711. With even a short - term when you touch the load cell with your finger, the readings also change greatly due to the sensor warming up from body heat. HX711 Based on Avia Semiconductor’s patented technology, HX711 is a precision 24-bit analog-to-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor. When powering arduino from USB cable the readings are much more stable (they are fluctuating like +-5 grams only) but when I connect a 12V power source When i start the serial monitor, i get these readings : HX711 calibration sketch Remove all weight from scale After readings begin, place known weight on scale Press + or a to increase calibration factor Press - or z to decrease calibration factor Zero factor: -1 Reading: -115. The tare completes and you seem to get a value from the HX711 (even if it's only 0,00). h" HX711 scale(5, 6); float calibration_factor = 1000; // this calibration factor is adjusted according to my load cell float units; float ounces; void setup() { Serial. 402 VDC while the HX711 (uint8_t pin_dout, uint8_t pin_sck) HX711 native constructor. i've followed readme file of the library HX711 wich says ## How to calibrate your load cell 1. update() all over my code as well. long getAveragedReading (uint8_t numReadings=1) Make a number of readings and get the average of them. 001 mV/V, maximum load capacity of 10 tons (10000Kg) I'm using hx711 with sparkfun's green and hx711 board, and it works, but it is a bit For the record, using cheap generic chinese hx711 and 5kg loadcell, I discovered that the output was horribly unstable until I moved the hx711 power from the 5v supply to the 3. Hx711 (M5Stack WEIGHT) This is a library to interact with the Hx711 ADC. ADC is giving random output within a range of 10000 to 12000 variation when the sensor is not connected, and the ADC is giving same random values when the sensor is connected. (ie 14. The HX711's implementation Thought I'd share results of tests I did on two HX711 boards using a barebones Arduino and different power sources. , moving average filter) to smooth out the readings. 9 g +- 0. The code to get one reading is shown below: #include When I use my mini PC to power my ESP32-C3 and HX711, my load cell readings are somewhat stable. they actually return very stable readings when used in my AVR program. This can be caused by a variety of factors such as electrical interference, improper grounding, or loose connections. i already wired the half bridge with the hx711 exactly like this pict and im using this code #include "HX711. I've tried upping the config. Is randomness is common in ADC, if so how to reduce the range of randomness? i We use some essential cookies to make our website work. You should get about the parameter you need to pass to set_scale. This is done by In this guide, you’ll be taken step by step through the process of creating a scale using the ESP8266 NodeMCU along with a load cell and the arduino HX711 amplifier. But the main concern is that the same hx711 board with the same connection and same code works on normal arduino uno. 3 v power supply for the load cell excitation The issue is with the values I'm reading from the HX711 - they're constantly changing, and not just slightly. your pictures do not show the connections in a clear way, therefore they are useless . The scales do not have to be extremely accurate, just a accurate as I can get using this method. I'm making a scale using a load cell and a HX711 amplifier. Đầu tiên, bạn sẽ học cách kết nối cảm biến Load cell và mạch chuyển đổi ADC HX711 với Arduino để xây dựng một cân điện tử. Hey y'all, I'm working on making a scale with 4 4-wire load cells from Sparkfun using the HX711 amplifier board. Connect E+ of HX711 Module with Right Node of WS Bridge. Thanks for the advice. Reasons behind choosing this one because it has HX710 who has inbuilt PGA and 24bit ADC with very stable response (as per datasheet). When I use my mini PC to power my ESP32-C3 and HX711, my load cell readings are somewhat stable. Good evening arduino team, I am using HX711 24 bit ADC for TCRT1000 reflective optical sensor. That way high and low readings will even out. JPG 1512×2016 680 KB. The problem is that my readings are not varying with different weights being put on the load cell. 90 re Hello, I am using load cells in my research project. I I'm using an HX711 connected to the 5V and GND ports of an Arduino UNO and four 220 ohm resistors for the Wheatstone bridge; the measured excitation voltage of the HX711 is around 4. It says that the default rate should be 10 Hz with closed jumpers, and 80 Hz with open. Call HX711_tare(10) (or any other value, but 10 should be OK). Force & Weight. I have desoldered pin 15 on the HX711 to go from 10 sa/sec to 80 sa/sec, however in the serial monitor I'm only seeing about 24 data points per second. I have only tested the device at 10 samples per second. I recently purchased an HX711 Weighing Module from DFRobot (Gravity: Arduino Digital Weight Sensor - DFRobot) and the 1 kg load cell that came with the weighing module. Thanks! I am using the HX711 for my project. I have tried to buy new load cells - but with same result. First, ensure the sensor is properly connected, especially the A+ and A-pins to the sensor's output. I am using an Arduino Nano to read SparkFun’s HX711 Load Cell Amplifier which reads a wheatstone bridge. h samples line to 32. 000kg (without load”) by key-in “t”or “T” into the command space and hit “Send” button. I don't see why two 1k:2k dividers on the output (to drop 5volt logic to If the load cell is exposed to cold nights and then hot, direct sunlight, or surrounding equipment heats up the area, this can cause inaccuracy. I'm currently attempting to get a reading from HX711 amplifier connected to a TAL220 (10KG bar type load cell) using Arduino. println("Press + or a to I recently purchased an HX711 Weighing Module from DFRobot (Gravity: Arduino Digital Weight Sensor - DFRobot) and the 1 kg load cell that came with the weighing module. Is there some way to get the HX711 readings converted in mV/V (from the library API or manually)? The data I am currently getting with the getData() function is in the 7,900,000 range. If so, then you I am wanting to do this without using a HX711 amplifier board. println(avg); do Serial. I have a code with 10 scales with hx711 but the code freezes during the process. md at master · Ragiton/micropython_hx711. Thank you. 3volt excitation voltage regulator to work. io knut_ny:. This ADC has 16 pins. We recommend our Combinator Board to make it easy to turn the four strain gauges into a wheatstone bridge type load cell. It takes about 2 seconds to get to a weight reading and once the weight is removed it takes another 2 seconds to get back to zero. h> #include <Wire. I wanted to have better performances in resolution and temperature drift, so i build a newer version with the HX712. But the readings I get are terribly inconsistent and as soon as more than ~90lbs of pressure are applied, the cell sort of crashes and only gives negative readings no matter the load: connecting resetting success connected 15 [315807, 158020, 78229, 78288, 6541823] 2018-12-18 18:48:43. 11: 3804: May 6, 2021 Strain guage. You switched accounts on another tab or window. The HX711 uses a two-wire interface (Clock and Data) for communication but unfortunately it has not implemented a complete two-wire Hi, I am doing a project to measure the weight of an object by using ESP32 and load cell. IMG_1459. Now, when the filling screw starts, readings start to fluctuate more (+- 1. hi,ı made a weight sensor project using with hx711 and an load cell. Another problem is -when I leave load (61,9kg) on the load I have an application where an HX711 ADC is used with 4 load cells. I don´t know if the problem is the strain gauge, or the resistance, or the Wheatstone half bridge. A kitchen scale has been repurposed as a dinamometer. hello guys so I'm busy playing around with my HKD 20kg loadcell my Arduino Uno and my hx711 board . The values are boucing all over the place +/- 4kg, and are not consistent. Adjust the parameter in step 4 until you get an accurate reading. When there is no load on the scale i get fluctuation of the following results: 0,23 0,41 2,52 4,59 0,00 0,00 2,19 and so on. This library aims to fill that gap by offering a Python implementation, making it compatible with platforms such as the Jetson Nano that use Python GPIO for sensor integration. 3V and am connecting it to an HX711 for reading a load cell. I used this code to get the HX711/load cell readings Hi all, I'm having problems getting load cells to work, mainly having the issue that when the load cell is hooked up i don't get any change in data(nor when pressing down on the load cell) I'm using an Arduino mega with 4 HX711 modules and 4 load cells, below is a diagram of the wiring. 0). Right now I am just trying to get the scale to work and I am using the Load Cell Amplifier HX711 Breakout Hookup Guide. HX711 unstable readings. 15 V. Even apply every code available on internet. Or, follow the "how to calibrate your scale" procedure in the bogde/HX711 library "README. I have taken the example code given for 2 load cells and modified it for 4 load cells. 25volt, and the weight/result becomes unstable. So I do this setup (but I Reading:0 lbs Reading:0 lbs one reading: -1839. I am wondering how to go about making code or logic that it will update the LCD readout // Include libraries needed #include <HX711. 9kg. I connected everything up but the only read I am getting from the arduino is 0. When i start the serial monitor, i get these readings : HX711 calibration sketch Remove all weight from scale After readings begin, place known weight on scale Press + or a to increase calibration factor Press - or z to decrease calibration factor Zero factor: -1 Reading: -115. The HX711 is VERY sensitive to PCB layout, and shielding. This should indicate that there is communication between the MCU and the HX711 and that the clock/data wiring is okay. Use a DVM and measure voltage across E+ and E- at the WS ridge side. →I want to store current values on One common issue with HX711 and load cell setups is unstable readings. I'm currently working on a project that uses the HX711 load cell amplifier while connected to a series of strain gauges in a full bridge circuit. println("HX711 Demo"); Serial. call tare() to reset the readings to 0, fill the container and get the weight of the content. Hello! I have been trying to get my Arduino Uno (Sparkfun kit) to read data from a digital scale for a few weeks but with no success. read_average() but with no weight, or using scale. It’s not fluctuating, it’s just constantly dropping. println((5219-avg)/114. i've connected everithing like the picture attached. HX711 Weighing Sensors ADC Module HX711 is a Load Cell Amplifier module with precision 24-bit analogto-digital converter (ADC) designed for You can reset the reading to 0. If I make readings with the machine stopped, results are prefect. Sign up for free to join this conversation on It seems to take a reading once a second, and therefore the reading is very unstable. I'm trying to understand how the HX711 works and I'm facing some challenges. Your code looks a little more stable than my I’m having trouble with a load cell connect via HX711 module. Assuming the scale is linear, the HX711 now works like a millivolt meter. I have a commercial weighing scale that can measure weights from 0. I watched countless tutorials everyone seems to be managing fine I can't get this to work. Apparently it can happen that the scale is measuring negative values but the GUI will not display negativ kg values, so you only get 0kg, The HX711 needs a 5volt supply for the 4. 2024-05-25 by Try Catch Debug Hi all, The first version of my project is using the HX711 24 bits A/D converter. Is it possible that there is someting wrong with the the load cell or the wiring between the load cell and the HX711? Hello All I am using a Anemometer Wind Speed Sensor w/Analog Voltage Output. h> HX711 scale; void setup() {} void loop() { int Hello, I'm new to this field and have a question about using a strain gauge load cell and its amplifier. Ask Question Asked 5 years, 8 months ago. h library The problem is I'm loosing the weight after few hours and reading go back 0kg. read_average(25) function the last bits are unstable, seeing the result with My ESP8266+HX711 works well if I use an arduino sketch with the lib <HX711. Hi, I am using the HX711 with the HX711_library for a project. With rated output 2. 3volt logic. 2. 0 g). long getRawReading Get raw reading from the HX711. Try with another load cell of 40kg and the reading is unstable, the author fails to explain this project better. tare() So say you have a raw value of 10000 for 0 weight (tare) and 20000 for 1000g, and want readings in g First, your offset (b) is 10000 Hi, I'm currently working on a project that uses the HX711 load cell amplifier while connected to a series of strain gauges in a full bridge circuit. Implement software filtering techniques (e. Many of the code samples take numerous readings (about 10) and average the result, but I was wondering if the readings could be improved by simply adding a capacitor across the load cell's sense leads to form a low-pass filter? tl;dr HX711 works fine until a noisy force input is introduced at which point all the readings go negative. This makes any calibration attempt basically impossible as the values change drastically. The Sparkfun module seems to differ from most other available modules as it has some additional components for noise reduction. you are correct, i have no idea how everything is connected you are the only one that knows how it is connected . I am monitoring the voltage with a calibrated Fluke 787 and the voltage never moves off of 0. It worked correctly for a few weeks, but suddenly stopped working (cannot get any useful readings anymore. println("After readings begin, place known weight on scale"); Serial. This was already done before i figured out the temperature behaviour. For example: HX711 scale1; HX711 scale2; The line: scale. There was no physical movement between each of the runs and they were located indoors, here on my desk (i. e. Power up the UNO. Many HX711 breakout boards use an on-board 4. Quarter Bridge Strain Gauge with HX711 Amplifier. I am using a Wemos D1 mini v4. I’m having a hard time getting these HX711 + load cells to work. I'm using an ESP32-S3-WROOM-1U and a four load cells, connected in a full Wheatstone bridge to an HX711 to read the weight of an object. I am using a 9 VDC battery, Brown to + on battery, Black to - on Battery and Arduino, Blue to A15. I'm using a 5 measurement long buffer for averaging (when successive measurements do not exceed a threshold value), but even without that I get stable values. The scale will zero and read 0g for a few cycles before it begins to fluctuate either down or up by Trong hướng dẫn lần này, bạn sẽ tìm hiểu cách tạo một cân điện tử với Arduino sử dụng cảm biến Loadcell và mạch chuyển đổi ADC HX711. tare() So say you have a raw value of 10000 for 0 weight (tare) and 20000 for 1000g, and want readings in g First, your offset (b) is 10000 Hi all, this is ,my first time working with EPS32s and ESPHome. Be sure to lift at least one of the wires to be measured off the ADC board to get an accurate I'm using a load cell (TAL220 10kg) and a HX711 with an Arduino to measure weight. You signed in with another tab or window. Hi, first of all: thanks for the great work on this. I am using this HX711 library which seems the most common one and if I call set_gain(64) I get some strange things. (Single strain gauge load cells only have three wires instead of four. power_down() Set the load cell to sleep mode. In this tutorial, you will also learn how to calibrate your load cell or strain gauge, How to connect Load cell to the HX711 amplifier board, how to connect amplifier board Hi friends, I want to measure micro volts accurately for this I choose HX711 module which is used in Weighing scale. Supplying the cells from the raw 5volt rail will make readings unstable. The same We are using an HX711 with our own combiner circuit design for a 6 wire load cell (7 with shield) and 4 load cells on a 24/7 propane kiosk. Place a known weight on the scale and call `get_units(10)`. What am I missing to get these working. Using a Load Cell or Weight sensor you can add this capability to your Arduino projects. I also get random false readings or timeouts from the HX711. 8: 2211: July 11, 2024 Load cells - Different readings when If the load cell is exposed to cold nights and then hot, direct sunlight, or surrounding equipment heats up the area, this can cause inaccuracy. The module documentation can be found here. Never used one. But if I use a USB power adapter (my phone's) as a power supply, my load cell readings become more erratic. The code to get one reading is shown below: #include It is this "object" that is your interface to the HX711 physical device. My controller is a D1 Mini knockoff. Hello everyone! I want to build a project based on Arduino. Once readings are displayed place the weight on the scale OVERVIEWWe’ve all used a scale to determine the weight of something at some point in our lives. Please help it is very important for my project. I've read many topics about this problem, but i cant seem to be able to figure it out and i need my scale to be a bit more When running the HX711_full_example I get increasing values at each reading: HX711 Demo Initializing the scale Before setting up the scale: read: 4216884 read average: 4217088 get value: 4217178. ( one weight bag reading should be inbetween 19-25kg while other should be between 38-45kg). I I have been trying different channels, but just briefly, since I don't know what they mean. 4. I have added pictures to this post of how I connected it. Basically i want to get 2 different weight bags readings from strain gauge full bridge using hx711. I am using a cheap HX711 board and have a Sparkfun one on the way. To take a reading of Good day, as a beginner I need advice on a project. These readings aren't simply negative, they're offset by a varying margin too. I have an issue with the library though. I recorded data on 6 different occasions with the load cells loaded the exact same way. I'm also using the WeightScale. I have connected an Adafruit FT232H Breakout to my PC. The original HX711 2 load cell library example code is available here. Pick an object with know weight. JPG 1512×2016 402 KB. it has nothing to do with being nice or not nice, but it HX711 and Quarterstone Bridge Unstable Readings. Modified 5 years, 8 months ago. Excitation voltage (and load cell output) will be unstable on 3. 7V to 5V so the Arduino 5V power I would start by giving the HX711 a stable signal on the order of your load cell (probably a few mV) using a voltage divider, and see if it stabilizes or if it still does the same thing. 32 all the time (even when the HX711 connects to Wi-Fi). I have tried a few different load cells and even a few different signal amplifiers (HX711 from DIY and and Texas Instruments INA125P). I am referring FOLLOWING document to use it in real! Code I am trying to use is as follows #define Greetings, now is few years when I am using my beeScale (Arduino Uno + Load Cell + HX711) and in ideal weather (15+ degrees celsius and humidity below 70%) are readings almost perfect (10-50g per 100kg is ok for me). I think this part is okay, given the readings above. You can name them whatever you like. Note, I switched DOUT and SCK to (3,2) and (D3,D2) respectively to match up to what I wired. 4: 36: November 19, 2024 Science and Measurement. If I step off and then step on again, the value can be 5kg out again. While the readings are significantly better than with the other HX711 library, I have a la in data display. Hello everybody, I am trying to read from this popular HX711 breakout board with an Adafruit Huzzah ESP8266 and a stock esp8266-20161110-v1. println("Remove all weight from scale"); Serial. Skip to content. After first putting this together I was getting wildly fluctuating readings. On the LCD whenever it has to display the value from the scale. Any help will be highly appreciated! DT to A1 SCK to A0 Thanks oh here is my code: Hi all, I intend to use few load cell sensors together with hx711 adc and arduino. Therefore, we have to filter the noise and stabilize the readings of every sensor before using it for applications. I wired 4 resistors in a wheatstone bridge config to the sensor, and was expecting readings of around 0 when printing on the uart terminal, but I get almost random values, ranging from -100 to 17000, back to 0 and -5000! Code: #include <HX711. I started out with a reading of 220991 and am now down to 204998 (an Currently I am running into an issue where I am running the calibration code that is in the hx711 library, but I cannot get any steady readings from my load cells no matter what calibration coefficient I use. Furthermore I To build the scale, im using 4 50kg strain gauges, a sparkfun load sensors combinator, and a sparkfun HX711 amplifier, and here are the problems. The library that I am using is the HX711_ADC by Olav Kallhovd (can be installed by searching in Manage Library). amazon. include "HX711. 1 Hello, I have put together an D1 mini pro with HX711 and 4 load cells and when I run the code from HX711_ADC (Olav Kallhovd) the weight stabilize at 0 and I jump on the bed and the weight increases and drop when I exit it, it works for hours. 9 in a matter of minutes. If you aren't familiar with the following concepts, we recommend /* ----- HX711_ADC Arduino library for HX711 24-Bit Analog-to-Digital Converter for Weight Scales Olav Kallhovd sept2017 ----- */ /* Settling time (number of samples) and data filtering can be adjusted in the config. First, to see if the connections are correct I have directly measured voltages in different points of the circuit, and even used different values of resistors and they seem alright. Using Arduino. double hello with arduino nano - HX711- load cell without weight on the scale or with weight sample without weight on the scale scale. Hot Network Questions I have four load cells connected in a quarter bridge to HX711 circuit. Try adjusting the HX711 gain in your code to 64 or 32, as the default 128 may not be suitable. 0 After setting up the scale: read: 4217602 read average: 4218342 I have been trying different channels, but just briefly, since I don't know what they mean. 2: 599: May 6, 2021 Home Hi, first of all: thanks for the great work on this. Place a known weight on the scale and HX711_call get_mean_units(10). void waitUntilReady Wait until the sensor is ready, this is a blocking function. PD_SCK - pin #A0 HX711 scale(A1, A0); // parameter "gain" is ommited; the default value 128 is used by the library void setup() { Serial. Each test consisted of taking 10,000 samples and then One is working as intended; however, the other is giving either extremely delayed or very, very inaccurate readings. 2: 630: May 5, 2021 Strain gauge issue! Not reading properly. 00000 with 0 decimals of accuracy [12:38:09][D][hx711:031]: 'Bed I am using an Arduino Uno and HX711 amplifier to collect data from a load cell. I am only getting readings around 1750 in the serial monitor. Hi people of AskElectronics, I have run into a problem I can't quite diagnose. My complete code is available here. - micropython_hx711/README. Project Guidance. com AuBreey Digital Load Cell Weight Sensor 1KG Portable Electronic Kitchen Scale + I'm really a newcomer to arduino and I'm trying to build a scale with four SEN-10245 load cells and a HX711. 4; You should be able to find these parameters based on your readings/numbers. begin(38400); Serial. It has the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value, sample rate, time stamp and units of precision. To use two of them you first need to have two objects - one for each HX711. PD_SCK - pin #A0 HX711 scale(A1, A0);// parameter "gain" is ommited; the default value 128 is used by the library. my question is how can i Hello, I'm designing - electronic part -for filling machine using UNO + BOSCH loadcell + HX711 Problem is that readings are fluctuating (up/down) while filling so this is affecting accuracy of threshold close gate decision. Note: VCC is the analog voltage to power the load cell. It works well, but when I opened the scale and connected its load cell to my HX711 amplifier and Arduino Uno, I'm getting unstable weight readings - the weight keeps changing. Actually I Hello, I'm currently making an arduino based digital scale with a standard 5kg load cell, a hx711 amp, lcd display, and a few buttons for basic interface now already made that calibration code that stores values in EEPROM but after calibration the weight seems to drift around 1. I did a The project, a weighting system to evaluate residual quantity in a container. get_units(10) return fluctuating values reading -2407. However when I setup my circuit as shown bellow, the readings fluctuate regularly slowly Hello, I posted here a short while ago about querying a HX711 amp I’m using to make a scale. I use typical load sensors routed through an HX711 for weight measurement, and I did some tests using the standard hx711 library available through pip, and it worked pretty well, modulo some wild measurements which could be removed through judicious filtering and the occasional failed weight request. read the value: Instead of: Serial. 3V & GND) HX711 An Arduino library to interface the Avia Semiconductor HX711 24-Bit Analog-to-Digital Converter (ADC) for Weight Scales. Documentation. If I use ESPEasy, without touching the scale, I get: Code: Selecteer alles In this case, I'd check that the power supply is stable, that the load cell is in good shape and that there isn't anything creating unstable shortcuts on the circuitry. It provides a power_down() function, to put the ADC into a Looking for Guidance: Load Sensors >> HX711 >> ESP32 >> Home Assistant, ESPHome A few months back I got this bed occupancy sensor working: https: Because the instructions in the documents don't address my questions - specifically if there's a I have 4x 50kg load cells connected to a HX711 to make weight scales, but I'm getting wildly different readings. The reading should be I built an Arduino Bathroom Scale With four 50 Kg Load Cells and HX711 Amplifier. Then I used the code I found here GitHub - newAM/LoadCellOccupany: Home automation occupancy sensor using load cells I need some help; At one time I got a load cell of 5kg + hx711 + nodemcu and If not, the excitation voltage is less than the designed ~4. VDD is the digital supply voltage used to set the logic level. Traditionally, HX711 sensors have official libraries available only in C++ for Arduino. The project also includes a push-button for taring (zeroing) the . Run Serial Monitor to write down the readings. IMG_1460. 3" I2C OLED display (PIN 5, PIN 4, 3. ) Suggested Reading. I've found the reference C program in the datasheet for hx711. Ask Question Asked 8 years, 2 months ago. Reload to refresh your session. it's not nice to say my images are useless and but just because YOU don't know something. For this the strain gauge is powered thorugh USC-C - 5 V - from the grid. The example code has . Scale is giving me 1)When use 4 loadcells together with the hx711 adc - and adjust the readings so when I have a load on the load cell of 61,9kg the Arduino show 61. 70 reading -2424. 3. begin(DOUT, CLK); is where it tells the HX711 object which pins the HX711 chip is connected to. Modified 8 years, Unstable ADC reading of HX711. 6. Hi, Ive been working on a HX711 project for over a month and Im stuck, my readings aren't changing when I apply force. get_units() to fetch the data and the I tested your code on a spare 2Kg load cell, HX711(without RF shield) and Arduino Uno, but without the LCD (just let it print to serial monitor). To troubleshoot this load cell problem, you might take temperature readings at Once readings are displayed place the weight on the scale: Press +/- or a/z to adjust the calibration_factor until the output readings match the known weight: Arduino pin 6 -> HX711 CLK: Arduino pin 5 -> HX711 DOUT: Arduino pin 5V -> HX711 VCC: Arduino pin GND -> HX711 GND: The HX711 board can be powered from 2. 3V? If so, try to set it up with a 5v board and see if it improves If we use these noisy and unstable readings for calculations and outputs, they also might contain errors. ı determine my calibration factor and using There are numerous HX711 boards out there, and they vary wildly in performance. Navigation Menu Toggle navigation. On the HX711 I have DT going to the arduino D3, and SCK to D2. So everything will be turned off all Hello and dear Forum, I am complete rookie so please excuse my rookie mistakes. 000 ± 0. It the data is signed format data then you would want to sign extend the 24-bit value into the 32-bit variable. Many of the code samples take numerous readings (about 10) and average the result, but I was wondering if the readings could be improved by simply adding a capacitor across the load cell's sense leads to form a low-pass filter? It is this "object" that is your interface to the HX711 physical device. I'm testing an hardware with HX711 with holder for Arduino Nano/Micro series and i'm trying to switch from normal Arduino Micro and Arduino Nano 33 BLE Sense. Here's a summary of my procedure: Connection of the Load Cell: I connected the wires of the load cell as follows: Excitation terminals to E+ Check the HX711 module’s gain settings and ensure that they are appropriate for your load cell. . We use optional cookies, as detailed in our cookie policy, to remember your settings and understand how you use our website. g. I'm interfacing a load cell using a HX711 ADC to read its results into a microcontroller. In this tutorial we will see how to It the data from the HX711 is unsigned data then just set the bits [31:24] of the variable to zeros. If I understand correct this code should work using your lib which I made more simple to understand what is going on in reading the raw values. , if the "raw" weight is HX711 module, last bits unstable. HX711 Load cell providing constant large and negative reading. h" // HX711. I've wired all the grounds as well as 5V powers together on a breadboard and the rest of the clocks and datas to pins 2-9. Go figure – but worth experimenting for all those with wild fluctuation problems. 001g to 500g. I’ve since managed to get readings from the scale but I’m noticing strange fluctuations. 3: 2423: SparkFun OpenScale (SEN-13261) The SparkFun OpenScale is a simple-to-use, open source solution for measuring weight and temperature. ino" The update() function checks for new data and The Hx711 is a popular choice for reading load cells and strain gauges due to its high accuracy and ease of use. There is no specified I've been getting readings of +/- 50g with occasional higher and lower spikes from the load cell at 10 SPS both loaded and unloaded. I can run BBC micro:bit MakeCode editor extension for HX711 connected to weight sensors. 3volt. The purpose of what created is like lab equipment for a particular experiment. 6 -> I disconnect at this moment Reading:0 lbs Reading:0 lbs Hi, I was trying to debug a HX711 to see if it is functioning correctly. Note that I connected the wires for Hi 1)When use 4 loadcells together with the hx711 adc - and adjust the readings so when I have a load on the load cell of 61,9kg the Arduino show 61. I have the bridge balanced to plus/minus 5 mV and is attached to the HX711 board using the attached schematic. Apparently it can happen that the scale is measuring negative values but the GUI will not display negativ kg values, so you only get 0kg, If you are planning on using load sensors 1 you will need to obtain or purchase four units. 3 lbs calibration_factor: After calibrating, I uploaded the Read 1x load cell, the value keep changing, drifting or unstable. so please help me for the codei want to used the NODEMCU. The output i’m getting isn’t stable. It worked fine with my friends arduino nano when he tested it. I have connected a load cell to a SparkFun HX711 Load Cell Amplifier and wired that to GPIO pins C0 and C1 on the FT232H BOB. I'm using an Arduino Nano and have the CLK of the HX711 connected to pin D5 and the DAT connected to pin D6. →I measured calibration factor already. I pretty much copied the code and it isn’t reading values just 0. Unfortunately, i can’t get any result with it Readings, if any are unstable, and there is no variation while putting some weight on the cell I only can get some variation in Hello everyone , I used HX711 ADC module with Arduino IDE in that i used HX711 Arduino Library → In that i used this code for measure weight. For one, the readings come out very scattered around for the same weight, and I can't seem to really zero it out (it's always like -0. 2 g continuously displayed on the LCD. Hi All, First of all let me thank you for your time to read this post and potentially help. The final measurements are converted using a basic linear regression to get a calibrated values in decagrams. Sign in Product Call calibrate_scale(20000) to map the raw reading to 20000 µV = 20 mV. But I don't get any readings, I tried changing the uno,loadcell and hx711 ,still no readings. Hi All, I'm working on a project that requires an accurate but small weight measurements, so I've been using a single 50KG load cell with a HX711 amplifier as I've been told they give the most accurate measurements for small sensors measuring in the range of 10N-50N. Knowing that I have 24bits of resolution My project includes Atmega328 along with 74HC595 for driving 5 7segment displays (multiplexed). The cheap boards are so noisy they never really settle down, so are incapable of precise performance. Use calibrate linear to map a few different values, no load to zero, then use things of known weights, generally something significant like 15 lbs and 40 lbs. x is the raw value from the HX711 - from scale. println("Before setting up Here is some example Python code I wrote for use with pigpio. While with the Micro, the HX711 library responded with good and stable values, with BLE i see strange and unstable values. 80 reading -2681. mvg weaoj oly rvgaxqb zclasyt zkbxz vtie ucilkq thdtr qqd