UART Communication echo problem

[MichelD]

I want to make serial connection in between an nRF52833 and a LPC1752.

When I use the UART in a firmware without using the SoftDevice for Mesh 4.0.1, everything is working just fine. Communication is good between the two controllers. No echo from the nRF52833.

But if I use the UART in a firmware using SoftDevice for Mesh 4.0.1, when the nRF52833 receives a message from the LPC1752, it sends an echo on the TX pin.

And this even if I disable the TX function.

Any though on this?

[awneil]

You need to look carefully at that firmware to see where it's doing the echo!

Is it the nRF52833 doing it locally, or is it something in the Mesh sending back an echo?

[MichelD]

Oups.Found the problem on my FW.  The one with a Mesh app. It was echoing each received chars.

Sorry to bother with this.

[awneil]

No worries.