Guys, I have communication between serial TX and RX between an ATtiny85 and a Nextion HMI. Can I put a led on the TX and another on the RX on these lines to indicate the communication?
Sure. Include series resistors to keep current low (~5mA). But the port0 tx/rx usually have onboard led's for just that reason.
I saw that on the Arduino Uno R3 board the TX and RX LEDs are on different pins from the TX and RX that communicates with the ATmega328.
But in the case of ATtiny85 I have few available pins.
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