For touchscreen applications it is recommended to use 1 Arduino for touch display and 1 Arduino for data acquisition and process control. Data transfer between Arduino's should be through serial port.
In this project I used :
1 Arduino Mega;
1 2,4" LCD TFT Touchscreen display;
1 DHT 11.
Code and library for this application: https://github.com/valentinandrei91/2...