No changing in output value from HX711 module

Hi everyone,
I'm new to using Arduino, I'm working to get the deformation of an object by two strain gauges, so with an half-bridge.
The problem is that I don't have any variation in the output from the HX711 module.
Would be great if I could get some advice as to why I'm not getting any results and do let me know if I can provide more information to get assistance.

#include "HX711.h"

// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 2;
const int LOADCELL_SCK_PIN = 3;

HX711 scale;

void setup() {

void loop() {

  if (scale.is_ready()) {
    long reading =;
    Serial.print("HX711 reading: ");
  } else {
    Serial.println("HX711 not found.");


Are you sure it is connected correctly? From your Frizzy picture I can understand why, you have no power connected to the Arduino? Posting a schematic would help a lot. You state a HX711 module, which one? There are several with different pinouts.

You have another thread on this topic Strain gages wheat-stone bridge
I showed you that your scheme is wrong.
You dropped that stream and opened a new one.
I know that cross-posting is not welcomed on the forum.
Why are you doing this?

Thanks for the answer, what you mean with no power connection to Arduino?
Hope this schematic could be helpful.

I'm using your scheme but still not working so I thought that the problem should be on a different component like the HX711 Module or the code.

The fritzing shows you are combining strain elements and fixed resistors in an asymmetrical manner - this will account for the HX711 output being jammed to the rail.

You have to have accurate resistance match in a bridge like this, using 0.1% resistors or better, so the voltage difference going into the HX711 is a few millivolts only.

Unless the resistors are high precision and low tempco, the output will drift all over the place as the temperature fluctuates.

Can you please draw your circuit with pen(cil) and paper?
It will be clearer than the mass of crossed line Fritzy has provided.

Do you have a DMM?

Have you tried the HX711 example in the IDE?

Thanks.. Tom.. :smiley: :+1: :coffee: :australia:

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.