Unofficial Nextion/TJC User Forum

Communications Protocol

Just a general question:

Can I communicate RS232 with the Nextion display?
Do I need some special hardware?

Can someone point me to an example?


You can’t. “True” RS232 has bipolar (positive and negative) signal levels while the Nextion’s and most MCU’s UARTs use unipolar signals. A negative voltage at the input would destroy them. There are specific level converters like the MAX232 by Maxim Integrated for that.

Thank you so much for your answer.
I am going to get some hardware to properly convert RS232 to UART so I don’t have to worry about these things.


This forum is in no way affiliated with NEXTION®, ITEAD STUDIO®, TJC®, or anyone else really. All product names, logos, and brands are property of their respective owners. All company, product, and service names used in this website are for identification purposes only. Use of these names, logos, and brands does not imply endorsement from the respective rights holder(s).