Setup nRF Cloud with own boards by using AT commands

[Bernd]

We have developed our own application board with the nRF9160 on it according to the reference design.

The modem is connected to an application controller by UART (no HW Ctrl pins) and I have the same UART to connect from outside.

I wanted to know if it is possible to connect it to the nRF Cloud for test reasons (just send some packages)

For the moment I use the "Serial LTE modem" Software (removed RTS/CTS) to send AT commands from application controller.

In general I can get a connection with the LTE/NB-ioT and get an IP address.

Questions:

- Is it possible to connect to the nRF Cloud just using AT commands?

- How can I use / update a certificate (only AT)?

- How do the packages look like that must be sent (by AT)?

Thanks for helping...

Regards,

Bernd

[Jun Qing ZOU]

"I see for example a "#XMQTTEVT: 1,-128" response and can't work with SLM's MQTT anymore"

MQTT event type: MQTT_EVT_DISCONNECT, result: -128 (ENOTCONN)

MQTT client lose connection to the broker.

"I have tested this also with a public MQTT broker without TLS. Once I disconnect the MQTT client, I cannot restart another MQTT session"

Please wait to test MQTT in NCSv1.7.0 in which re-connect to MQTT broker is now possible.

Or you can try SLM in NCS master now.