serialTFT-test.ino is file to control serial tft (Aduino uno + 3.5inch TFT Shield) by SERIAL (PIN 0,1) of ARDUINO UNO
tft3.5serial.ino is firmware of diy serial tft (Aduino uno + 3.5inch TFT Shield) to read command by SERIAL (PIN 0,1) of arduino
you must not connect before upload code because it will error when upload (pin 0,1 same as a SERIAL USB port) you must connect after upload code
On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board.
| device | serial tft | <-----> | arduino uno |
|---|---|---|---|
| pin | 0 | <-----> | 1 |
| pin | 1 | <-----> | 0 |