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Seithan / EasyNextionLibrary

A simple library for Nextion display that uses only four functions. You can easily benefit from Nextion's wide range of features and advantages in just a few easy steps. The library uses a custom protocol that can prove to be a powerful tool for advanced users as it can be easily modified to meet one’s needs.
MIT License
116 stars 29 forks source link

NEXTION is not displaying the data sent to it #48

Closed mphohio closed 1 year ago

mphohio commented 1 year ago

I am working on a project using an ESP32-S3 and Nextion display. I found your library and felt is was a perfect fit for my minimal coding skills. Everything works when using the NEXTION simulator, but when I interface with the display nothing I send gets displayed.
I submitted a detailed explanation in a request for help on the arduino forum and was wondering if you can talk a look and LMK if you have any advice/suggestion on how to fix my problem. The details start with post #3. The link is: https://forum.arduino.cc/t/esp32-s3-and-nextion-7-intelligent-display/1091880/

Seithan commented 1 year ago

Hello @mphohio

The problem you are experiencing is that you do not have a common ground between Nextion and ESP

mphohio commented 1 year ago

Not the problem, but the issue has been resolved. Thanks!

Giorgiofossati commented 1 year ago

Not the problem, but the issue has been resolved. Thanks!

Hello, @mphohio how you solved your problem?

mphohio commented 1 year ago

@Giorgiofossati My problem was when using the ESP32-S3 I needed to assign the Serial Rx & Tx pins in the begin statement, but the Easy Nextion Library would throw an error when I added anything other than the baud rate. The solution was to assign myNex to Serial2, then in Setup I started Serial2 with the pin assignments and then started myNex (see below).

`EasyNex myNex(Serial2);

(in Setup) Serial2.begin(9600, SERIAL_8N1, RXp2, TXp2); myNex.begin(9600);`

I am not a programmer so I was not aware that you could start a Serial port and then assign it to an object.

Mike