Data sent to Serial2 shows up in Serial Monitor

[Lukas]

Hi Max,

have you tried to supply the display from the 5V at the CONTROLLINO pinheader? If you are using external 5V adapter – have you interconnected GND of CONTROLLINO and GND of the display?

From your description it seems that RX and TX are interconnected at the display side …

Any progress so far?

Thanks,

Lukas

[Max]

Hi Lukas,

thank you for your reply. It pointed me to the problem.
As the Nextion Display requires more power than the pinheader supplies I connected it to an external 5V power supply.

Now, I connected the 5V GND’s of the external power supply and the Controllino pinheader.
Now i am getting a clean signal.

Thank you for directing me towards the solution!

Best Regards,

Max