#include "HX711.h"

int s0 = 21;
int s1 = 19;
int s2 = 18;
int s3 = 5;
int inputSignalPin = 17;
int echoPin = 2;
int dataPin = 17; 
int clockPin = 12 ; 
HX711 scale;

int readMux(int channel){
  int controlPin[] = {s0,s1,s2,s3};

  int muxChannel[16][4]={
    {0,0,0,0}, // channel 0
    {0,0,0,1}, // channel 1
    {0,0,1,0}, // channel 2
    {0,1,0,0}, // channel 3
    {1,0,0,0}, // channel 4
    {0,0,1,1}, // channel 5
    {0,1,0,1}, // channel 6
    {1,0,0,1}, // channel 7
    {0,1,1,0}, // channel 8
    {1,0,1,0}, // channel 9
    {1,1,0,0}, // channel 10
    {0,1,1,1}, // channel 11
    {1,0,1,1}, // channel 12
    {1,1,0,1}, // channel 13
    {1,1,1,0}, // channel 14
    {1,1,1,1}, // channel 15
   };


// lop through the 4 sig
for(int i = 0; i < 4; i++){
  digitalWrite(controlPin[i], muxChannel[channel][i]);
}

// read the value at the SIG pin
int val = analogRead(inputSignalPin);

// return value
return val;

// Kirim sinyal trigger
digitalWrite(inputSignalPin, LOW);
delayMicroseconds(2);
digitalWrite(inputSignalPin, HIGH);
delayMicroseconds(10);
digitalWrite(inputSignalPin, LOW);

// Baca sinyal echo
int duration = pulseIn(echoPin, HIGH);

// Konversi durasi ke jarak
int distance = duration * 0.034 / 2;

return distance;

scale.begin(dataPin, clockPin);
return scale.read();
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(s0, OUTPUT);
  pinMode(s1, OUTPUT);
  pinMode(s2, OUTPUT);
  pinMode(s3, OUTPUT);
  pinMode(inputSignalPin, INPUT);
  pinMode(echoPin, INPUT);

  digitalWrite(s0, LOW);
  digitalWrite(s1, LOW);
  digitalWrite(s2, LOW);
  digitalWrite(s3, LOW);
} 

void loop() {
  // Put your main code here, to run repeatedly:
  for (int i = 0; i < 16; i++) {
    int inputSignal = readMux(i);
    Serial.print("Channel ");
    Serial.print(i);
    Serial.print(": ");
    Serial.println(inputSignal);
    int distance = readMux(i);
    Serial.print("Distance : ");
    Serial.print(distance);
    Serial.println(" cm");
    long weight = readMux(i);
    Serial.print("Weight : ");
    Serial.print(weight);
    Serial.println(" units");

    analogWrite(inputSignalPin, 0);    // Off
    analogWrite(inputSignalPin, 64);    // Off
    analogWrite(inputSignalPin, 127);  // Medium brightnes
    analogWrite(inputSignalPin, 191);  // Medium brightness
    analogWrite(inputSignalPin, 235);  // Full brightness
    analogWrite(inputSignalPin, 255);  // Full brightness
  }
  
}