Hello, i'm trying to setup my NEXTION dsicovery 3.5"
The problem is that the Nextion can't send command to the arduino, but if arduino send a string to nextion it display the value.
The strange is that in the Nextion simulator with MCU connected everything work perfectly.
I read everything online about Nextion so GND is common (otherwise ardu couldn't send to nextion)
i tried with arduino nano and UNO which have 1 serial so i tested on arduino mega on serial1. tried several libraries with the same results.
Could be a defected nextion device? so it can't send command?
Could be a Editor version problem? or i need to update nextion firmware?
Maybe a serial communication problem? nextion send serial data at 3.3v but arduino shouldn't have problem with that, read 1 above 2.5v...
My mind is blowing! Help me please!
Thankyou