ESPTestLoadCell2.ino

#include "HX711.h"  //You must have this library in your arduino library folder
//#include "soc/rtc.h"
#define DOUT  25
#define CLK  26
 
HX711 scale;
 
//Change this calibration factor as per your load cell once it is found you many need to vary it in thousands
float calibration_factor = 100; //Change this with your choosen range
//=============================================================================================
//                         SETUP
//=============================================================================================
void setup() {
  Serial.begin(115200);
  Serial.println("HX711 Calibration");
  Serial.println("Remove all weight from scale");
  Serial.println("After readings begin, place known weight on scale");
  Serial.println("Press a,s,d,f to increase calibration factor by 10,100,1000,10000 respectively");
  Serial.println("Press z,x,c,v to decrease calibration factor by 10,100,1000,10000 respectively");
  Serial.println("Press t for tare");
  scale.begin(DOUT, CLK);
  scale.set_scale();
  scale.tare(); //Reset the scale to 0
 
  long zero_factor = scale.read_average(); //Get a baseline reading
  Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects.
  Serial.println(zero_factor);
  
}
 
//=============================================================================================
//                         LOOP
//=============================================================================================
void loop() {
 
  scale.set_scale(calibration_factor); //Adjust to this calibration factor
 
  Serial.print("Reading: ");
  Serial.println(scale.get_units(), 3);
  Serial.print(" kg"); //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person
  Serial.print(" calibration_factor: ");
  Serial.println(calibration_factor);
  Serial.println();
 
  if(Serial.available())
  {
    char temp = Serial.read();
    if(temp == '+' || temp == 'a')
      calibration_factor += 10;
    else if(temp == '-' || temp == 'z')
      calibration_factor -= 10;
    else if(temp == 's')
      calibration_factor += 100;  
    else if(temp == 'x')
      calibration_factor -= 100;  
    else if(temp == 'd')
      calibration_factor += 1000;  
    else if(temp == 'c')
      calibration_factor -= 1000;
    else if(temp == 'f')
      calibration_factor += 10000;  
    else if(temp == 'v')
      calibration_factor -= 10000;
    else if(temp == 'g')
      calibration_factor += 100000;  
    else if(temp == 'b')
      calibration_factor -= 100000;   
    else if(temp == 't')
      scale.tare();  //Reset the scale to zero
  }
  delay(1000);
}