Issue with Peripheral UART sample on Thingy53

[MarioStoica]

Hello. I am trying to use the Peripheral UART sample to transmit data from a Thingy53 board to another Thingy53 board (which is running Central UART sample). The boards connect successfully, but the data cannot be transmitted using the NRF serial terminal. 

However, if I connect to a phone instead, I can transmit data from the phone to the board successfully, but I cannot do from the board to the phone. 

Am I understanding it wrong? Isn't typing the text that I want to transmit into the serial terminal supposed to work?

Thank you.

I am using the v2.8.0 Toolchain with v2.7.0 SDK, on MacOS 15.4 arm version.

[Amanda Hsieh]

Hi, 

I am using the v2.8.0 Toolchain with v2.7.0 SDK, on MacOS 15.4 arm version.

The versions of the toolchain and SDK are not consistent. I would suggest you use the same version to work. 

The latest version of NCS is v2.9.1 if it's possible for you.

Am I understanding it wrong? Isn't typing the text that I want to transmit into the serial terminal supposed to work?

Did you attach the debug board (nRF5340DK) and connect an external USB to UART converter as the doc? 

If you attach the debug board, it would show the second serial port for transmission. 

Regards,
Amanda H.

[MarioStoica]

Hello Amanda. Thank you for your reply. I attached the debug board now, and indeed I get a new Serial Port, from which I can see what I transmit from the Phone to the Board. But, I cannot transmit from the board to a board. 

However, I am not sure that I did attach the USB-UART converter properly. I attached The RX to P6-08, TX to P6-09, and GND to GND. Is that correct or am I missing something?

[Amanda Hsieh]

What debug board are you using? I suggest you use the nRF5340DK with a JTAG 10-pin cable, something like this: 
https://www.amazon.nl/10-Pin-Pitch-Socket-Extension-Ribbon/dp/B09T5YBJSJ

[MarioStoica]

I have the PCA64142, which is included in the box. Is it possible to do it with that debug board?

[Amanda Hsieh]

No, you need the nRF5340DK or a J-LINK supporting M33 core.