nRF9160 mqtt server published message is split in chunks by 120 bytes by UART

[Spartak]

Hello, Guys.

I just wondered why max UART exchange when we receive mqtt buffer that is let's say 1707 bytes is splited bu uart in chunks max of 120 bytes.

Is there some UART transfer limitation in serial LTE modem?

[Spartak]

I show you that host receive only msx 120 bytes of info. Is it somewhere predefined?

Question is simple - which logs you want - from RTT?

[Didrik Rokhaug]

Add CONFIG_SLM_LOG_LEVEL_DBG=y to your prj.conf, rebuild the program, and re-flash the nRF9160.

Then, with the debugger still connected to the nRF9160, follow this guide to get RTT logs from the nRF9160: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/gs_testing.html#connecting-using-rtt