Guru
Joined: 07/08/2011
Location: AustraliaPosts: 6108
| Posted: 01:35am 27 Oct 2024 |
The first thing I would do is remove the ESP-01 module and link the Tx and Rx pins.
Then you can test the port by sending data and looking for the data echoed.
That proves the correct port and the physical board traces are correct.
You can use the ESP-01 from your PC so you know the correct baud rate etc.
I can't think of anything else to test.
Jim