Cannot play with serial

Support
1

I have a lilygo T3 v1.6.1 with the latest firmware 2.2.7

It is attached using bluetooth to my Ipad and using usb to power from PC.
I can use the webpage https://client.meshtastic.org/ as well as the Ipad to control the device.

However, I’d like to play with a serial output.
To that end, I attached a ftdi cable to io 15 and gp13.
Using 115200 baud and echo on, I cannot get anything in my (putty) terminal.
No matter which options I click on or off using the webpage or Ipad.

Sometimes messages will even not be acknowledged.

I think I am missing something.

I also tried using a rp2040 and could also not get any response on the serial terminal.

Anyone out there to give me some directions?

Thanks

2

Why did you chose those two pins?

Seems that JP1.RXD[11] and JP1.TXD[12] serve the purpose you’re looking for:

3

Thanks for the reply.
Apparantly that uart0 is used for the serial to usb. See ESP32 Pinout: How use GPIO pins ?

It needs a different uart.

Does someone know which physical pins to use and their corresponsing settings in the software?

4

@Dingdong - did you ever get your serial I/F on the T3-1.6.1 to work? I’ve been using serial well with the T-Beam (including using the Serial-to-USB to transfer the received serial data into my computer), but am also having difficulties on the T3-1.6.1. I’ve tried not modifying the RxTx pins, or setting them to 11/12, but neither passes any input on those pins onto the mesh. Please let me know if you were successful. Thanks!