Load Cell to control Actuator movement

philmac19913 · November 18, 2022, 6:18pm

I am confused on why i get an are at pinmode asking for a constructor.
The code should read the load cell for mass, once mass has been removed, the actuator should extend.

#include <HX711_ADC.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>
#endif

//pins:
const int HX711_dout = 4; //mcu > HX711 dout pin
const int HX711_sck = 5; //mcu > HX711 sck pin
const int A1B = 10;
const int A1A = 11;
pinMode(HX711_dout, INPUT);
pinMode( HX711_sck, INPUT);
pinMode(A1A, OUTPUT);
pinMode(A1B, OUTPUT);
//HX711 constructor:
HX711_ADC LoadCell(HX711_dout, HX711_sck);

const int calVal_eepromAdress = 0;
unsigned long t = 0;
float i
void setup() {
Serial.begin(57600); delay(10);
Serial.println();
Serial.println("Starting...");

LoadCell.begin();
//LoadCell.setReverseOutput(); //uncomment to turn a negative output value to positive
float calibrationValue; // calibration value (see example file "Calibration.ino")
calibrationValue = 696.0; // uncomment this if you want to set the calibration value in the sketch
#if defined(ESP8266)|| defined(ESP32)
//EEPROM.begin(512); // uncomment this if you use ESP8266/ESP32 and want to fetch the calibration value from eeprom
#endif
//EEPROM.get(calVal_eepromAdress, calibrationValue); // uncomment this if you want to fetch the calibration value from eeprom

unsigned long stabilizingtime = 2000; // preciscion right after power-up can be improved by adding a few seconds of stabilizing time
boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
LoadCell.start(stabilizingtime, _tare);
if (LoadCell.getTareTimeoutFlag()) {
Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
while (1);
}
else {
LoadCell.setCalFactor(calibrationValue); // set calibration value (float)
Serial.println("Startup is complete");
}
}

void scale()
{
static boolean newDataReady = 0;
const int serialPrintInterval = 0; //increase value to slow down serial print activity

// check for new data/start next conversion:
if (LoadCell.update()) newDataReady = true;

// get smoothed value from the dataset:
if (newDataReady) {
if (millis() > t + serialPrintInterval) {
i = LoadCell.getData();
Serial.print("Load_cell output val: ");
Serial.println(i);
newDataReady = 0;
t = millis();
}
}

// receive command from serial terminal, send 't' to initiate tare operation:
if (Serial.available() > 0) {
char inByte = Serial.read();
if (inByte == 't') LoadCell.tareNoDelay();
}

// check if last tare operation is complete:
if (LoadCell.getTareStatus() == true) {
Serial.println("Tare complete");
}

}

void loop ()
{
if (i < 8.00)
{ analogWrite(A1B, 0);
analogWrite(A1A, 255);
}
else if (i >= 8.01)
{
scale();
analogWrite(A1B, 0);
analogWrite(A1A, 0);
}
}

horace · November 18, 2022, 7:03pm

use code tags </> when uploading code - it makes it easy read
upload the error complete messages?
upload a schematic of the circuit?

philmac19913 · November 18, 2022, 7:14pm


#include <HX711_ADC.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>
#endif

unsigned long t = 0;
float calibrationValue = 431;
float i = 0.0;
//pins:
const int HX711_dout = 2; //mcu > HX711 dout pin
const int HX711_sck = 3; //mcu > HX711 sck pin
HX711_ADC LoadCell(HX711_dout, HX711_sck);
const int A1B = 11;
const int A1A = 10;


void setup() {
  Serial.begin(57600); delay(10);
  pinMode(HX711_dout, INPUT);
  pinMode( HX711_sck, INPUT);
  pinMode(A1B, OUTPUT);
  pinMode(A1A, OUTPUT);

  Serial.println();
  Serial.println("Starting...");


  LoadCell.begin();
  //LoadCell.setReverseOutput(); //uncomment to turn a negative output value to positive
  float calibrationValue; // calibration value (see example file "Calibration.ino")
  calibrationValue = -431.0; // uncomment this if you want to set the calibration value in the sketch
#if defined(ESP8266)|| defined(ESP32)
  //EEPROM.begin(512); // uncomment this if you use ESP8266/ESP32 and want to fetch the calibration value from eeprom
#endif
  //EEPROM.get(calVal_eepromAdress, calibrationValue); // uncomment this if you want to fetch the calibration value from eeprom

  unsigned long stabilizingtime = 2000; // preciscion right after power-up can be improved by adding a few seconds of stabilizing time
  boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
    while (1);
  }
  else {
    LoadCell.setCalFactor(calibrationValue); // set calibration value (float)
    Serial.println("Startup is complete");
  }
}

void scale()
{
  static boolean newDataReady = 0;
  const int serialPrintInterval = 0; //increase value to slow down serial print activity

  // check for new data/start next conversion:
  if (LoadCell.update()) newDataReady = true;

  // get smoothed value from the dataset:
  if (newDataReady) {
    if (millis() > t + serialPrintInterval) {
      i = LoadCell.getData();
      Serial.print("Load_cell output val: ");
      Serial.println(i);
      newDataReady = 0;
      t = millis();
    }
  }

  // receive command from serial terminal, send 't' to initiate tare operation:
  if (Serial.available() > 0) {
    char inByte = Serial.read();
    if (inByte == 't') LoadCell.tareNoDelay();
  }

  // check if last tare operation is complete:
  if (LoadCell.getTareStatus() == true) {
    Serial.println("Tare complete");
  }

}
void loop ()
{
  if (i > 43.00)
  { scale();
    analogWrite(A1B, 0);
    analogWrite(A1A, 0);
  }
  else if (i <= 40.00)
  {
    scale();
    analogWrite(A1B, 50);
    analogWrite(A1A, 0);
  }
}

philmac19913 · November 18, 2022, 7:18pm

no longer getting the erro message. program runs, now i having an issue with it completing the task i need. continuously reading the scale and activating when weight is removed

philmac19913 · November 18, 2022, 7:19pm

horace · November 18, 2022, 7:23pm

can you upload the Serial Monitor output indicating where you think it is going wrong?
what happens if i > 40 or <= 43? scale() is not called

philmac19913 · November 21, 2022, 1:35pm

right now, the scale is reading in negatives for some reason and yes. i believe it is going wrong as it is reading for both motor functions.

horace · November 21, 2022, 2:27pm

put in Serial.println() statements during the program so you can trace program flow and results at each stage
then upload the serial monitor output
edit: there is this statement in setup()

  //LoadCell.setReverseOutput(); //uncomment to turn a negative output value to positive

what happens if you uncomment it?

philmac19913 · November 28, 2022, 7:21pm

//Library inclusions
#include <HX711_ADC.h>
#if defined(ESP8266)|| defined(ESP32) || defined(AVR)
#include <EEPROM.h>
#endif


unsigned long t = 0;
float calibrationValue = 431;// calibration offset
float i = 0.0;

const int HX711_dout = 2; //mcu > HX711 dout pin
const int HX711_sck = 3; //mcu > HX711 sck pin
HX711_ADC LoadCell(HX711_dout, HX711_sck);//Defined from HX711 library
const int switch_pin = 4;
int Act_Push = 10;
int Act_Pull = 11;
int switch_pin_n = 5;

void setup() {
  Serial.begin(57600); delay(10);
  pinMode(switch_pin, INPUT);
  pinMode(switch_pin_n, INPUT);
  pinMode(Act_Push, OUTPUT);
  pinMode(Act_Pull, OUTPUT);
  digitalWrite(Act_Push, LOW);
  digitalWrite(Act_Pull, LOW);

  Serial.println();
  Serial.println("Starting...");

  //Program begins and LoadCell begins reading output

  LoadCell.begin();
  //LoadCell.setReverseOutput(); //uncomment to turn a negative output value to positive
  float calibrationValue; // calibration value (see example file "Calibration.ino")
  calibrationValue = 431.0; // uncomment this if you want to set the calibration value in the sketch
#if defined(ESP8266)|| defined(ESP32)
  //EEPROM.begin(512); // uncomment this if you use ESP8266/ESP32 and want to fetch the calibration value from eeprom
#endif
  //EEPROM.get(calVal_eepromAdress, calibrationValue); // uncomment this if you want to fetch the calibration value from eeprom

  unsigned long stabilizingtime = 2000; // preciscion right after power-up can be improved by adding a few seconds of stabilizing time
  boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
    while (1);
  }
  else {
    LoadCell.setCalFactor(calibrationValue); // set calibration value (float)
    Serial.println("Startup is complete");
  }
}
//Able to run scale function continuously inside the loop function
void scale()
{
  static boolean newDataReady = 0;
  const int serialPrintInterval = 0; //increase value to slow down serial print activity

  // check for new data/start next conversion:
  if (LoadCell.update()) newDataReady = true;

  // get smoothed value from the dataset:
  if (newDataReady) {
    if (millis() > t + serialPrintInterval) {
      i = LoadCell.getData();
      Serial.print("Load_cell output val: ");
      Serial.println(i);
      newDataReady = 0;
      t = millis();
    }
  }

  // receive command from serial terminal, send 't' to initiate tare operation:
  if (Serial.available() > 0) {
    char inByte = Serial.read();
    if (inByte == 't') LoadCell.tareNoDelay();
  }

  // check if last tare operation is complete:
  if (LoadCell.getTareStatus() == true) {
    Serial.println("Tare complete");
  }

}
void loop() {
  scale();
  //Seat is occupied
  if ( i >= 40) {
    digitalWrite(Act_Push, LOW);
    digitalWrite(Act_Pull, LOW);
  }
  //Seat occupied with manual control (Extend)
  if (digitalRead(switch_pin) == LOW && i >= 40) {
    digitalWrite(Act_Push, LOW);
    digitalWrite(Act_Pull, HIGH);
  }
  //Seat is empty, Actuator Retracts
  if ( i < 40) {
    digitalWrite(Act_Push, LOW);
    digitalWrite(Act_Pull, HIGH);
  }
  //Seat occupied with manual control (Retract)
  if (digitalRead(switch_pin) == HIGH && i >= 40) {
    digitalWrite(Act_Push, HIGH);
    digitalWrite(Act_Pull, LOW);
  }
  // Seat occupied with manual cruise control
 if (digitalRead(switch_pin_n) == HIGH && i >= 40) {
   digitalWrite(Act_Push, LOW);
    digitalWrite(Act_Pull, LOW);
 }
}

philmac19913 · November 28, 2022, 7:22pm

this is a new code that does what i want except the middle pin of my 3 position toggle switch does not hold the actuator in place.

system · May 27, 2023, 7:23pm

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Load Cell to control Actuator movement

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