Hello! So I am currently working on a project to combine a load cell, ultrasound sensor and a peristaltic pump to dispense some water until the glass reaches a certain weight. Individually, all three components are working fine and I have been able to integrate the ultrasound sensor and the pump without any problems however, when I try to integrate all 3, I seem to face a problem. The tare function in my void setup is somehow not executing and as a consequence, the serial monitor is stuck at the code before the tare function. I am wondering if this is a programming error and if so, why is it not working?
//author of ultrasound code: www.elegoo.com
//author of load code: Nathan Seidle
#include "SR04.h"
#define TRIG_PIN 12
#define ECHO_PIN 11
#include "HX711.h"
#define RST 4
#define DOUT 3
#define CLK 2
HX711 scale(DOUT, CLK);
float calibration_factor = -2680.00; //-7050 worked for my 440lb max scale setup
float oldCal_factor;
float oldWeight;
SR04 sr04 = SR04(ECHO_PIN,TRIG_PIN);
long petriDish;
int pushButton = 2;
int motorControl = 9;
void setup() {
Serial.begin(9600);
Serial.println("test line");// wrote these testlines to see which part of my setup is holding up the program
pinMode(pushButton, INPUT);
pinMode(motorControl, OUTPUT);
Serial.println("HX711 calibration sketch");
Serial.println("Remove all weight from scale");
Serial.println("After readings begin, place known weight on scale");
scale.set_scale();
scale.tare(); //Reset the scale to 0
//Get a baseline reading
long zero_factor = scale.read_average();
//This can be used to remove the need to tare the scale.
// Useful in permanent scale projects.
Serial.print("Zero factor: ");
Serial.println(zero_factor);
// Reset pin (to rezero the weight not reset the board!)
pinMode(RST, INPUT_PULLUP);
delay(1000);
}
void loop() {
scale.set_scale(calibration_factor);
// Read an average of X readings
float weight = scale.get_units(10);
// An intermediate weigth value that we round according to some rules
int netWeight = 0 ;
// Make scale more sensitive at lower end
// Weight > X then just round to nearest integer
if (weight >= 5.0) {
netWeight = (weight * 10.0);
weight = (int)(0.5 + (netWeight / 10.0));
}
// Weight < Y then call it zero
else if (weight > -0.01 && weight <= 0.01) {
weight = 0;
}
// Any other weight will have 1 dec. place of precision
else {
netWeight = (weight * 10.0);
weight = (netWeight / 10.0);
}
// Only print something out if it has changed (weight or cal. factor)
if (calibration_factor != oldCal_factor || weight != oldWeight) {
oldCal_factor = calibration_factor;
oldWeight = weight;
Serial.print("Reading: ");
Serial.print(weight, 2);
Serial.print(" g");
Serial.print(" calibration_factor: ");
Serial.print(calibration_factor);
Serial.println();
}
petriDish=sr04.Distance();
Serial.print(petriDish);
Serial.println("cm");
if ( petriDish <= 10){
do {
digitalWrite(motorControl, HIGH);
Serial.println("motoring");
} while( weight <=30);
}
digitalWrite(motorControl, LOW);
delay(100);
}
