I'm building an automatic aquarium which isn't related to my question, but I have already filled up too many pins to bring a 16x2 LCD screen into play. I was wondering what I can do to move the pins around. I have only used PWM pins so far and none of the digital pins on my Arduino Mega.
Basically, my pins that I have filled already are PWM2-9, which only leaves my TX & RX pins, and 10-13, but for the LCD, all the examples I have watched/tried use 5 PWM pins and the TX pin. So I am 1 pin short.
I have: - RGBW LED strip which requires 4 - Switch which requires 1 - A double relay module which requires 2 - A temperature sensor that requires 1
Can any of these pins be moved to digital so I can add the LCD screen?