Unable to receive messages from UART (COM) from ESP 5.4.2 onwards
Posted: Tue Sep 30, 2025 6:47 am
We were using ESP IDF 5.4.1 for our project and recently we migrated to ESP IDF 5.5.1. After migration our COM port functionality stopped working. The issue is we are able to send data to RS485 COM port and the other end we are able to receive but the data from outside is not receiving by my device. I tried with default echo_RS485 example. Same issue there also. Later we observed that it's not working from ESP 5.4.2 version onwards. I have attached the example code which I tried in both ESP IDF 5.4.1 and 5.4.2