load_singular.ino

#include <FastLED.h>
#include <HX711_ADC.h>

//HX711 constructor (dout pin, sck pin)
HX711_ADC LoadCell(4, 5);

long t;

// How many leds in your strip?
#define NUM_LEDS 64 

// For led chips like Neopixels, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806, define both DATA_PIN and CLOCK_PIN
#define DATA_PIN 6
#define CLOCK_PIN 13

#define COMM_PIN 7

CRGB leds[NUM_LEDS];

void setup() { 
  Serial.begin(9600);
  Serial.println("resetting");
  LEDS.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
  LEDS.setBrightness(84);

  Serial.println("Wait...");
  LoadCell.begin();
  long stabilisingtime = 4000; // tare preciscion can be improved by adding a few seconds of stabilising time
  LoadCell.start(stabilisingtime);
  LoadCell.setCalFactor(696.0); // user set calibration factor (float)
  Serial.println("Startup + tare is complete");

  pinMode(COMM_PIN, OUTPUT);
  digitalWrite(COMM_PIN, LOW);
}

void loop() { 
  LoadCell.update();

  //get smoothed value from data set + current calibration factor
  bool isHuggerPresent = false;
  
  if (millis() > t + 400) {
    float i = LoadCell.getData();
    Serial.print("Load_cell output val: ");
    Serial.println(i);
    t = millis();
    if(i > 180.0){ 
      isHuggerPresent = true;
     }
  }

  if(isHuggerPresent){
    loadBlue();
    digitalWrite(COMM_PIN, HIGH);
  }else {
    clearLed();
    digitalWrite(COMM_PIN, LOW);
  }

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

void fadeall() { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(250); } }

void loadBlue() {
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Blue;
    // Show the leds
    FastLED.show(); 
    fadeall();
//    delay(10);
  }
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Blue;
    // Show the leds
    FastLED.show(); 
//    delay(10);
  }
}

void clearLed() {
  for(int i = 0; i < NUM_LEDS; i++) { 
    leds[i] = CRGB::Black;
    FastLED.show(); 
    fadeall();
//    delay(10);
  }
}