NRF9160 returning "ERROR" for specific mqtt-subscribe command

[LarsV]

Dear Forum,

Im sending at-command's from the nrf52840dk over UART to the NRF9160dk.

Hooking up the NRF9160 to the pc directly, every command works fine, but when sending the commands from the nrf52840, 1 specific command doesnt work.

The MQTTCON command works, the ping command works, just sending AT works. Everything except the subscribe command. I've verified again that is does work when sent from the computer. The other commands work as well so i have to idea what the problem could be.

Kind regards,

Lars

[Hakon]

Hello,

any logs, error codes or other information about the problem is appreciated. It is kind of difficult to tell what's going on from what you have described. Also, it would be nice if you could post the code for the nrf52840 as well.

[LarsV]

Hello,

Unfortunately the logs dont show the MQTT commands in j-link rtt-viewer. Im using arduino based code to send the UART commands. That shouldn't be the issue as the other commands seem to come across just fine.

i have lowered the baudrate to 38400 on both sides to aid stability on the test-setup, but i dont think that should be it either. 

[Hakon]

What sort of error do you receive? Does the at command timeout? Is the error returned immediately? If it is, maybe there is a syntax error for the command.