#include "SevSeg.h"
SevSeg sevseg;

const int lm35Pin = A1; // LM35 sensor connected to analog pin A1

void setup() {
  Serial.begin(9600);
  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_ANODE; // See README.md for options

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments);
  sevseg.setBrightness(90);
}

void loop() {
  int lm35Value = analogRead(lm35Pin); // Read the analog value from the LM35
  float voltage = lm35Value * (5.0 / 1023.0); // Convert the analog value to voltage
  float temperature = voltage * 100.0; // Convert the voltage to temperature in Celsius

  // Convert temperature to string with one decimal place
  char tempStr[6];
  dtostrf(temperature, 4, 1, tempStr); // 4 is width, 1 is precision

  // Create an array to hold the segment values for each digit
  byte segments[4];

  // Convert temperature string to segments
  sevseg.setChars(tempStr);

  // Get the segment values from the converted temperature string
  sevseg.getSegments(segments);

  // Custom character for segments AFGB (A=1, F=1, B=1, G=1, others=0)
  segments[2] = 0b1100011; // Bit pattern for AFGB

  // Set the last digit to 'C'
  segments[3] = 0b0111001; // Bit pattern for 'C' on a common anode display

  // Turn on the decimal point of the 3rd digit
  segments[2] |= 0b10000000; // Set the MSB to 1 to turn on the decimal point

  // Update the display with the custom segments
  sevseg.setSegments(segments);

  sevseg.refreshDisplay();
}