#include "HX711.h"
#include "Adafruit_ILI9341.h"
#include "SPI.h"
#include "Wire.h"
#include "Adafruit_FT6206.h"

#define TFT_CLK 18   // CLK pin for TFT display
#define TFT_MISO 12  // MISO pin for TFT display
#define TFT_MOSI 23  // MOSI pin for TFT display
#define TFT_CS 5    // CS pin for TFT display
#define TFT_DC 21     // DC pin for TFT display
#define TFT_RST 22    // RST pin for TFT display

#define DOUT_PIN 2   // Data out pin for HX711
#define SCK_PIN 4    // Clock pin for HX711

HX711 scale;
float calibration_factor = 420; // this value is obtained by calibrating the scale with known weights


Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

void setup() {
  Serial.begin(115200);
  tft.begin();
  scale.begin(DOUT_PIN, SCK_PIN);
  scale.set_scale(calibration_factor);  // Use getDefaultCalibration() for more accuracy
  
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextSize(2);
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(10, 10);
  tft.println("Weight Measurement");
}

void loop() {
  if (scale.is_ready()) {
    long weight = scale.get_units(10)*1000;  // Read weight in grams (adjust as needed)

    tft.fillScreen(ILI9341_BLACK);  // Clear previous readings
    tft.setCursor(10, 10);
    tft.setTextSize(2);
    tft.print("Weight: ");
    tft.print(weight);
    tft.println(" g");
    
    Serial.print("Weight: ");
    Serial.print(weight);
    Serial.println(" g");
    
    delay(0.1);  // Update every second
  } else {
    tft.fillScreen(ILI9341_BLACK);
    tft.setCursor(10, 10);
    tft.setTextSize(2);
    tft.setTextColor(ILI9341_RED);
    tft.println("Error: HX711 not found.");
    
    Serial.println("Error: HX711 not found.");
    delay(5000);  // Wait for 5 seconds before retrying
  }
}