Sparkfun Thing Plus Matter MGM240P help needed.

Development Boards Development Tools
1

Hello everyone,

I encounter the following issue with the subject:

Integrated JLink OB on the board shall work as USB-to-TTL (UART) converter but it can’t do it reliably.

It misses a lot of transmitted by MGM240P data and sends unexpected obscure data to it every 2 seconds.

This completely breaks some important usage scenarios such as Radio Co-Processor or Network Co-Processor

also any OpenThread example with CLI is unusable.

Using external USB-to-TTL converter fixes the issue but I want to use integrated JLink OB for this purpose.

So, any suggestions on that, maybe newer firmware for JLink OB exists?

2

Sometimes, issues with data transmission can be due to buffer sizes and lack of flow control. Check if the JLink OB supports hardware flow control (RTS/CTS) and configure it accordingly.