Arduino Mega

Arduino Mega for Roaster Controller

Connect:

PWM for heater output to SSR (done)

MAX6675 to read thermocouple

I2C to LCD (done)

Pot to analog input (done)

Push buttons to interruptible pins

PWM16 libarary

Hardcoded on PWM16, pwm output pins and D3 for clock function

#define pwmOutA 9   // pin 9

#define pwmOutB 10  // pin 10

// definitions for PWM frequency selection on IO3

#define IO3_PIN 3 // pin DIO3 for IO3

Pins

D2 = But 0

D3 = Do not use, for PWM clock

D4 = S0  (MAX6675)

D5 = CS  (MAX6675)

D6 = SCLK (MAX6675)

D9 = Heater Output (PWM)

D10 = Fan Output (not used)

D16 = TX2 For Bluetooth HC-05 TX pin to voltage divider to HC-05 RX

D17 = RX2 Serial2 on pins 17 (RX) and 16 (TX)

D18 = But 1

D19 = But 2

D20 = SDA

D21 = SCL

A0 = Pot

Mega, Mega2560. Digital iins can be used for interrupts
2 , 3, 18, 19, 20, 21

Bluetooth

https://www.martyncurrey.com/using-an-arduino-mega-with-a-hc-05-zs-040-at-mode/ 

The Arduino Mega has three additional serial ports: Serial1 on pins 19 (RX) and 18 (TX), Serial2 on pins 17 (RX) and 16 (TX), Serial3 on pins 15 (RX) and 14 (TX)

  Serial2.begin(9600); //for bluetooth

Setup info

https://www.martyncurrey.com/hc-06-hc01-comv2-0/ 

https://www.martyncurrey.com/arduino-and-hc-06-zs-040/