//#include <Wire.h>
#include <TinyDebug.h>

// void setup() {
//   Debug.begin();
//   //Wire.begin(I2C_ADDRESS);      /* join i2c bus with address 8 */
//   //Wire.onRequest(requestEvent); /* register request event */
//   pinMode(1, OUTPUT);
//   pinMode (THERMISTORPIN, INPUT);         // thermistor ON ATtiny85 PIN4!
// }

// function that executes whenever data is requested from master
void requestEvent() {
  //Wire.write("24.33;"); /*send string on request */
  // send the current data as 16bits representing milliamps, first 2 bytes for sensor

  //unsigned short mAmps = presteinhart;
  //byte bytes[2] = { (byte)((mAmps >> 8) & 0xff), (byte)(mAmps & 0xff) };
  //Wire.write(bytes, 2);
  char buffer[5];
  //dtostrf(Tc, 4, 2, buffer);
  //Wire.write(buffer);
}

#define I2C_ADDRESS 0x08
const float BETA = 3950; // should match the Beta Coefficient of the thermistor

void setup(void) {
  Debug.begin();
}

void loop(void) {
  float temp_ntc_0 = cacl_temp(analogRead(A3));
  float temp_ntc_1 = cacl_temp(analogRead(A2));
  float temp_ntc_2 = cacl_temp(analogRead(A0));
  Debug.println("");
  Debug.print("temp_ntc_0=");
  Debug.println(temp_ntc_0);
  Debug.print("temp_ntc_1=");
  Debug.println(temp_ntc_1);
  Debug.print("temp_ntc_2=");
  Debug.println(temp_ntc_2);

  char buffer[20]; // 18
  char temp[10];

  memset(buffer, 0, sizeof(buffer));

  dtostrf(temp_ntc_0, 5, 2, temp);
  strcat(buffer, temp);
  strcat(buffer, ";");

  dtostrf(temp_ntc_1, 5, 2, temp);
  strcat(buffer, temp);
  strcat(buffer, ";");

  dtostrf(temp_ntc_2, 5, 2, temp);
  strcat(buffer, temp);
  strcat(buffer, ";");

  Debug.println(buffer);
  char hexBuffer[3 * sizeof(buffer)];  // Allocate enough space for 2 hexadecimal characters per byte and a null terminator

  for (int i = 0; i < sizeof(buffer) - 1; i++) {  // Subtract 1 to avoid printing the null terminator
    sprintf(hexBuffer + 3 * i, "%02X ", buffer[i]);  // Format each byte as a 2-digit hexadecimal value with leading zeros
  }
  hexBuffer[3 * (sizeof(buffer) - 1)] = '\0';  // Add null terminator at the end of the hexBuffer
  Debug.println(hexBuffer);

  delay(1000);
}

float cacl_temp(int analogValue) {
  return 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
}