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Programing with Arduino as proxy


it will be good, that we could prgram Nextion with Arduino as a proxy. For example :

My arduino have some work, but when i push 3 buttons, the program will stop, and one think, what the arduino will do is :



  while (true)


   if (Serial3.available()) { Serial.print(; }

   if (Serial.available()) { Serial3.print(; }


Then, after update Nextion LCD, user will off/on arduino with new lcd firmware.

I tried that, but there is conenction failed after lot of Serial speed variations.

Is it possible this to develop in Nextion Editor ? (Using only one speed of lcd in firmware and etc ?

1 person likes this idea

We are trying to offer similar functions. You will be able to directly update Nexiton through your own MCU,

This soundlikes very good. An estimate of the time ?

Hello, i have an error in my proxy program (not cast to char), so this time, i can say, that this steps is needed :

1) Set bauds=115200

2) create arduino function

void UploadFW()


  while (true)


   if (Serial3.available()) { Serial.print(char(; }

   if (Serial.available()) { Serial3.print(char(; }



3) run this method when you need

4) Upload from nextion editor.

And sorry, but your answer, that this is planed is very bad, when it is allready possible.

Posted a python script to upload to the modules in

The arduino version is a wip...

I am now reviewing all of the Feature Requests, this will take some time, patience please.

Multiple ways to accomplish with a good programmer.  C, basic, python, pascal.

It's not a language debate - but users require skills.

Arduino Library certainly needs work - carried forward.