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MQTT AT-Commands

PieterK

Good Day. I am wondering if anyone could maybe assist me in where I am going wrong with my software.

I have the intention of using a Nrf9160 as a serial modem through AT commands. As a chosen communication protocol we would like to use MQTT. 

Background info

Hardware : NRF9160

Firmware : mfwnrf9160120  (2020-04-29)

Software Image : Serial LTE Modem

I am attaching my project config file and the current AT-Commands that the modem will accept

My problem is that I cant seem to get the MQTT AT commands for the modem in.

When I started the GPS commands were initially not useable in the modem. So I modified the project config file and then the GPS commands became useable through AT-Commands. 

I am lost as to where I could be going wrong,  If any one would be able to help me out that would be very kind.

Fullscreen 4101.Project Config.txt Download 
#
# Copyright (c) 2020 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
# General config
CONFIG_LOG=y
CONFIG_LOG_DEFAULT_LEVEL=3
CONFIG_STACK_SENTINEL=y
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_RING_BUFFER=y

# Segger RTT
CONFIG_USE_SEGGER_RTT=n
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

# Network
CONFIG_NETWORKING=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_NATIVE=n
CONFIG_SLM_MQTTC=y

# MQTT
CONFIG_MQTT_LIB=y
CONFIG_MQTT_LIB_TLS=n
CONFIG_MQTT_CLEAN_SESSION=y

# Modem library
CONFIG_NRF_MODEM_LIB=y
# Align the max FD entry to NRF_MODEM_MAX_SOCKET_COUNT(8)
CONFIG_POSIX_MAX_FDS=8
# Enable below for modem trace
#CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=y

# Use GPIO
CONFIG_GPIO=y
CONFIG_GPIO_NRFX=y
CONFIG_GPIO_NRF_P0=y

# UART interface
CONFIG_SERIAL=y
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_TIMER2=y

# Stacks and heaps
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

# Device power management
CONFIG_PM_DEVICE=y

# FOTA
CONFIG_HTTP_PARSER_URL=y
CONFIG_FOTA_DOWNLOAD=y
CONFIG_FOTA_DOWNLOAD_PROGRESS_EVT=y
CONFIG_DFU_TARGET=y
CONFIG_DOWNLOAD_CLIENT=y
CONFIG_DOWNLOAD_CLIENT_STACK_SIZE=4096
CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_IMG_MANAGER=y

# FLASH
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_MPU_ALLOW_FLASH_WRITE=y
CONFIG_IMG_ERASE_PROGRESSIVELY=y

# Settings
CONFIG_SETTINGS=y
CONFIG_SETTINGS_FCB=y
CONFIG_FCB=y

# nRF Cloud
CONFIG_CLOUD_API=y
CONFIG_NRF_CLOUD_MQTT=y
CONFIG_NRF_CLOUD_FOTA=n
CONFIG_NRF_CLOUD_AGPS=y
CONFIG_NRF_CLOUD_PGPS=y
CONFIG_NRF_CLOUD_CELL_POS=y
CONFIG_NRF_CLOUD_LOG_LEVEL_INF=y
CONFIG_DATE_TIME=y
CONFIG_MODEM_INFO=y
CONFIG_MODEM_INFO_ADD_DATE_TIME=n
CONFIG_AT_MONITOR=y
CONFIG_MODEM_JWT=y
# Use "nrf-<IMEI>" as the default device_id format
# Use "<device_uuid>" as the device_id format by below
#CONFIG_NRF_CLOUD_CLIENT_ID_SRC_INTERNAL_UUID=y

#
# SLM-specific configurations
#

CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS_OFFLOAD=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_POSIX_NAMES=y

CONFIG_SLM_CUSTOMIZED=y
CONFIG_SLM_LOG_LEVEL_INF=y
CONFIG_SLM_EXTERNAL_XTAL=n
CONFIG_SLM_START_SLEEP=n
# Use UART_0 (when working with PC terminal)
CONFIG_UART_0_NRF_HW_ASYNC_TIMER=2
# Use UART_2 (when working with external MCU)
#CONFIG_SLM_CONNECT_UART_2=y
#CONFIG_UART_2_NRF_HW_ASYNC_TIMER=2


# nRF Cloud based location services
CONFIG_SLM_AGPS=y
CONFIG_SLM_PGPS=y
CONFIG_SLM_CELL_POS=y

Fullscreen 2047.AT-Commands.txt Download 
(0.000) *** Booting Zephyr OS build v2.7.0-ncs1  *** (44)
(0.000) Flash regions		Domain		Permissions (34)
(0.000) 00 01 0x00000 0x10000 	Secure		rwxl (35)
(0.000) 02 31 0x10000 0x100000 	Non-Secure	rwxl (39)
(0.000)  (0)
(0.000) Non-secure callable region 0 placed in flash region 1 with size 32. (67)
(0.000)  (0)
(0.185) SRAM region		Domain		Permissions (32)
(0.000) 00 07 0x00000 0x10000 	Secure		rwxl (35)
(0.000) 08 31 0x10000 0x40000 	Non-Secure	rwxl (38)
(0.000)  (0)
(0.000) Peripheral		Domain		Status (26)
(0.000) 00 NRF_P0               Non-Secure	OK (37)
(0.000) 01 NRF_CLOCK            Non-Secure	OK (37)
(0.000) 02 NRF_RTC0             Non-Secure	OK (37)
(0.000) 03 NRF_RTC1             Non-Secure	OK (37)
(0.000) 04 NRF_NVMC             Non-Secure	OK (37)
(0.000) 05 NRF_UARTE1           Non-Secure	OK (37)
(0.000) 06 NRF_UARTE2           Secure		SKIP (36)
(0.000) 07 NRF_TWIM2            Non-Secure	OK (37)
(0.000) 08 NRF_SPIM3            Non-Secure	OK (37)
(0.000) 09 NRF_TIMER0           Non-Secure	OK (37)
(0.000) 10 NRF_TIMER1           Non-Secure	OK (37)
(0.000) 11 NRF_TIMER2           Non-Secure	OK (37)
(0.000) 12 NRF_SAADC            Non-Secure	OK (37)
(0.000) 13 NRF_PWM0             Non-Secure	OK (37)
(0.000) 14 NRF_PWM1             Non-Secure	OK (37)
(0.000) 15 NRF_PWM2             Non-Secure	OK (37)
(0.000) 16 NRF_PWM3             Non-Secure	OK (37)
(0.000) 17 NRF_WDT              Non-Secure	OK (37)
(0.000) 18 NRF_IPC              Non-Secure	OK (37)
(0.000) 19 NRF_VMC              Non-Secure	OK (37)
(0.000) 20 NRF_FPU              Non-Secure	OK (37)
(0.000) 21 NRF_EGU0             Non-Secure	OK (37)
(0.000) 22 NRF_EGU1             Non-Secure	OK (37)
(0.000) 23 NRF_EGU2             Non-Secure	OK (37)
(0.000) 24 NRF_EGU3             Non-Secure	OK (37)
(0.000) 25 NRF_EGU4             Non-Secure	OK (37)
(0.000) 26 NRF_EGU5             Non-Secure	OK (37)
(0.000) 27 NRF_DPPIC            Non-Secure	OK (37)
(0.000) 28 NRF_REGULATORS       Non-Secure	OK (37)
(0.000) 29 NRF_PDM              Non-Secure	OK (37)
(0.000) 30 NRF_I2S              Non-Secure	OK (37)
(0.000) 31 NRF_GPIOTE1          Non-Secure	OK (37)
(0.000)  (0)
(0.000) SPM: NS image at 0x10000 (24)
(0.000) SPM: NS MSP at 0x200185f0 (25)
(0.000) SPM: NS reset vector at 0x11ff5 (31)
(0.000) SPM: prepare to jump to Non-Secure image. (41)
(0.191) *** Booting Zephyr OS build v2.7.0-ncs1  *** (44)
(0.024) The AT host sample started (26)
(3.005) AT+Clac (7)
(0.017) AT+CFUN (7)
(0.000) AT%CONEVAL (10)
(0.146) AT+COPS (7)
(0.000) AT%COPS (7)
(0.000) AT+CGDCONT (10)
(0.000) AT+CGACT (8)
(0.000) AT+CEMODE (9)
(0.000) AT+CGATT (8)
(0.000) AT+CGEQOSRDP (12)
(0.000) AT+CPINR (8)
(0.000) AT+CPIN (7)
(0.000) AT+CPSMS (8)
(0.000) AT+CEDRXS (9)
(0.000) AT%XPTW (7)
(0.000) AT+CEDRXRDP (11)
(0.000) AT+CEREG (8)
(0.000) AT%XNEWCID (10)
(0.000) AT%XGETPDNID (12)
(0.000) AT+CLAC (7)
(0.000) AT+CMEE (7)
(0.000) AT+CGMI (7)
(0.000) AT+CGMM (7)
(0.000) AT+CGMR (7)
(0.000) AT+CGSN (7)
(0.000) AT+CIMI (7)
(0.000) AT+CSCON (8)
(0.000) AT+CMGS (7)
(0.000) AT+CNMA (7)
(0.000) AT+CNMI (7)
(0.000) AT+CMGF (7)
(0.000) AT+CPMS (7)
(0.000) AT+CGSMS (8)
(0.000) AT%XSMMA (8)
(0.000) AT%CMNG (7)
(0.000) AT+CNEC (7)
(0.000) AT+CGEREP (9)
(0.000) AT%MDMEV (8)
(0.000) AT%CESQ (7)
(0.000) AT%XPCO (7)
(0.000) AT+CESQ (7)
(0.000) AT%XSIM (7)
(0.000) AT%XBANDLOCK (12)
(0.000) AT+CGPIAF (9)
(0.000) AT+CPAS (7)
(0.000) AT+COPN (7)
(0.000) AT+CSQ (6)
(0.000) AT+CEER (7)
(0.000) AT+CNUM (7)
(0.000) AT+CRSM (7)
(0.000) AT+CIND (7)
(0.000) AT+CLCK (7)
(0.000) AT+CPWD (7)
(0.000) AT%XCBAND (9)
(0.000) AT+CGPADDR (10)
(0.000) AT+CGCONTRDP (12)
(0.000) AT%NBRGRSRP (11)
(0.000) AT+CSIM (7)
(0.000) AT%XOPNAME (10)
(0.000) AT%XTIME (8)
(0.000) AT%XRAI (7)
(0.000) AT%XCONNSTAT (12)
(0.000) AT+CEPPI (8)
(0.000) AT%XDATAPRFL (12)
(0.000) AT%XMAGPIO (10)
(0.000) AT%XANTDETMAGPIO (16)
(0.000) AT%XMIPIRFFEDEV (15)
(0.000) AT%XMIPIRFFECTRL (16)
(0.000) AT%XCOEX0 (9)
(0.000) AT%XCOEX2 (9)
(0.000) AT%XANTCFG (10)
(0.000) AT%XEMPR (8)
(0.000) AT%XSUDO (8)
(0.000) AT%XPMNG (8)
(0.000) AT%XRFTEST (10)
(0.000) AT%XAPNCLASS (12)
(0.000) AT%XTEMPHIGHLVL (15)
(0.000) AT%XTEMP (8)
(0.000) AT%XPRODDONE (12)
(0.000) AT%XMODEMTRACE (14)
(0.000) AT%XEPCO (8)
(0.000) AT%XVBATLOWLVL (14)
(0.000) AT%XVBATLVL (11)
(0.000) AT%XVBAT (8)
(0.000) AT+CCLK (7)
(0.000) AT%CCLK (7)
(0.000) AT%XOPCONF (10)
(0.000) AT%XIPV6FAIL (12)
(0.000) AT%XUSIMLCK (11)
(0.000) AT%XOPERID (10)
(0.000) AT%XSMSFALLBACK (15)
(0.000) AT%XSYSTEMMODE (14)
(0.000) AT%XSNRSQ (9)
(0.000) AT+CGAUTH (9)
(0.000) AT%XMONITOR (11)
(0.000) AT%SHORTSWVER (13)
(0.000) AT%HWVERSION (12)
(0.000) AT%XMODEMUUID (13)
(0.000) AT%2DID (7)
(0.000) AT%XICCID (9)
(0.000) AT+ODISNTF (10)
(0.000) AT+ODIS (7)
(0.000) AT%ODIS (7)
(0.000) AT%XFACTORYRESET (16)
(0.000) AT%XNETTIME (11)
(0.000) AT%XDEEPSEARCH (14)
(0.000) AT+CEINFO (9)
(0.000) AT%XPDNCFG (10)
(0.000) AT%XPOFWARN (11)
(0.000) AT%XFILEWRITE (13)
(0.000) AT+CSODCP (9)
(0.000) AT%XDATASTOP (12)
(0.000) AT%XAPNSTATUS (13)
(0.000) AT%XMODEMSLEEP (14)
(0.000) AT%XT3412 (9)
(0.000) AT%XCOUNTRYDATA (15)
(0.000) AT%RAI (6)
(0.000) AT%NCELLMEASSTOP (16)
(0.000) AT%NCELLMEAS (12)
(0.000) AT%JWT (6)
(0.000) AT%ATTESTTOKEN (14)
(0.000) AT%KEYGEN (9)
(0.000) AT%KEYINJECT (12)
(0.000) AT%REL14FEAT (12)
(0.000) AT%PERIODICSEARCHCONF (21)
(0.000) AT%APNRATECTRL (14)
(0.000) AT+CCHO (7)
(0.000) AT+CCHC (7)
(0.000) AT+CGLA (7)
(0.000) OK (2)

  • 0 in reply to Øyvind

    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

    6471.serial_lte_modem.zip

  • +1 in reply to PieterK

    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

  • 0 in reply to PieterK

    Happy to hear that your issue is solved!

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

    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. 

  • 0 in reply to PieterK

    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 

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