MQTT AT-Commands

RE: MQTT AT-Commands

Ashvin Makwana — Tue, 26 Apr 2022 12:12:48 GMT

Hi Pieterk

I have check your thread and I am new into nRF9610 platform.

I am working on same application as yours difference is I have STM32 mcu in place of nrf52.

I am trying to build serial lte modem application for nRF9610 for MQTT purpose over STM32.

I have installed necessary software and tested some pre-build images and example on dk board over usb connection.

if possible can you help me to share some information on how would I building this serial lte application and list of at command that you used in nrf52 it would be helpful.

Any help will be appreciated.

Thanks & Regards,

Ashvin

RE: MQTT AT-Commands

Øyvind — Fri, 08 Apr 2022 12:32:30 GMT

Happy to hear that your issue is solved!

[quote user="PieterK"]I do see that the command AT+CLAC does not return any of the MQTT commands[/quote]

Yes, this is correct as the SLM AT commands are proprietary AT commands, while the modem-specific AT commands are documented in the nRF91 AT Commands Reference Guide.

RE: MQTT AT-Commands

PieterK — Thu, 07 Apr 2022 14:07:21 GMT

Good day. I seem to have resolved my problem.

I removed the following line from my project config and came right.

CONFIG_SLM_MQTTC=y

I do see that the command AT+CLAC does not return any of the MQTT commands

RE: MQTT AT-Commands

PieterK — Thu, 07 Apr 2022 13:55:56 GMT

The nrf52832 is working correctly as we have a few running the codeset we have made for them. We chose to have the nrf52 as the "Master" of the two as we require BLE in our application.

I am still developing on a nRF9160DK. I am currently using the device through a UART serial port to get all my AT-Commands ready for getting the device attached to the networks and to read GPS.

All my other commands are currently useable, But the MQTT commands do not show when I send the command AT+CLAC then I get the reply in the file "AT-Commands.txt"

When I send the AT command for MQTT connect I only get error.

AT#XMQTTCON=1,"3001","MyUseName","MyPassword","MyBrokerDetails",1883

devzone.nordicsemi.com/.../6471.serial_5F00_lte_5F00_modem.zip

RE: MQTT AT-Commands

Øyvind — Thu, 07 Apr 2022 13:41:11 GMT

The Serial LTE Modem is configured to work out of the box when it comes to MQTT. Have you read the MQTT AT Commands documentation?

Can you please elaborate what is failing on your side? From the log output you provided: "AT-commands.txt", the output does not reflect what the Serial LTE Modem prints.

[quote user="PieterK"]CONFIG_SLM_MQTTC=y[/quote]

This is not a configuration available in the nRF Connect SDK

[quote user="PieterK"]The nRF52832 is working correctly. I have zero issues when it comes to this.[/quote]

How do you know this is working correctly?

RE: MQTT AT-Commands

PieterK — Thu, 07 Apr 2022 12:11:14 GMT

The nRF52832 is working correctly. I have zero issues when it comes to this.

My problem is that the AT-Commands for MQTT are not currently in my command set. The MQTT commands are not part of the firmware on the nrf9160. I have added the following to my project config file for MQTT and they are still not in my command set

CONFIG_SLM_MQTTC=y

# MQTT
CONFIG_MQTT_LIB=y
CONFIG_MQTT_LIB_TLS=n
CONFIG_MQTT_CLEAN_SESSION=y

RE: MQTT AT-Commands

Øyvind — Thu, 07 Apr 2022 11:20:39 GMT

Could you elaborate exactly where it fails on your side? What are you running on the nRF52832? Please provide more information for me to reproduce this issue.

Thank you!

Kind regards,
Øyvind

RE: MQTT AT-Commands

PieterK — Wed, 06 Apr 2022 14:31:58 GMT

Good day, Thank you for responding.

I am using a nrf52832 as a microcontroller to communicate to the nRF9160 using UART.

We plan to use the nRF9160 as a modem via AT-Commands from the nRF52832.

RE: MQTT AT-Commands

Øyvind — Wed, 06 Apr 2022 13:15:29 GMT

Hello,

Do you mean controlling the Serial LTE Modem via internet? The intention of the SLM is that is receives the AT Commands over UART from an external computer or MCU.

Could you please elaborate more on your intention?

Thanks.

Kind regards,
Øyvind