<![CDATA[ATOM DTU NB MQTT Example dosn't work]]>Hello Community,

i have an ATOM DTU NB iot device and i try the example flow in UIFlow Base - DTU - NB-iot - Load Example. I changed the mqtt-Server and credentials but i get an error.

Serial Output:

"rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:5228
load:0x40078000,len:12908
ho 0 tail 12 room 4
load:0x40080400,len:3512
entry 0x4008063c

   _  __ _

_ ()/ | | _____ __
| | | | | || |/ _ \ \ /\ / /
| || | | | | () \ V V /
_,||| ||___/ _/_/

APIKEY: XXXXXXXX
Traceback (most recent call last):
File "main.py", line 36, in <module>
File "base/DTU_NB.py", line 50, in mqtt_to_connect
File "base/DTU_NB.py", line 75, in mqtt_ischeck_connect
IndexError: list index out of range
MicroPython f78d1e78a-dirty on 2022-11-24; M5Stack with ESP32
Type "help()" for more information.
"

SIM is inserted. What i'm doing wrong? Can somebody help?

]]>https://community.m5stack.com/topic/4864/atom-dtu-nb-mqtt-example-dosn-t-workRSS for NodeFri, 08 May 2026 07:40:54 GMTMon, 05 Dec 2022 15:02:23 GMT60<![CDATA[Reply to ATOM DTU NB MQTT Example dosn't work on Wed, 07 Dec 2022 17:24:23 GMT]]>Hello @BennoB

I can confirm that the UiFlow example doesn't work for me either. The block to connect to MQTT seems to be broken or not properly adapted for the SIM7020.

@m5stack : please fix. Thank you.

Thanks
Felix

]]>https://community.m5stack.com/post/19466https://community.m5stack.com/post/19466Wed, 07 Dec 2022 17:24:23 GMT<![CDATA[Reply to ATOM DTU NB MQTT Example dosn't work on Tue, 06 Dec 2022 13:27:26 GMT]]>Same issue with downgraded V1.9.9

]]>https://community.m5stack.com/post/19451https://community.m5stack.com/post/19451Tue, 06 Dec 2022 13:27:26 GMT<![CDATA[Reply to ATOM DTU NB MQTT Example dosn't work on Tue, 06 Dec 2022 13:21:24 GMT]]>The same. Nothing changed. Load example, Download to device, open Terminal and reset device with button B.

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:5228
load:0x40078000,len:12908
ho 0 tail 12 room 4
load:0x40080400,len:3512
entry 0x4008063c

   _  __ _

_ ()/ | | _____ __
| | | | | || |/ _ \ \ /\ / /
| || | | | | () \ V V /
_,||| ||___/ _/_/

APIKEY: XXXXXXXX
Traceback (most recent call last):
File "main.py", line 36, in <module>
File "base/DTU_NB.py", line 50, in mqtt_to_connect
File "base/DTU_NB.py", line 75, in mqtt_ischeck_connect
IndexError: list index out of range
MicroPython f78d1e78a-dirty on 2022-11-24; M5Stack with ESP32
Type "help()" for more information.

]]>https://community.m5stack.com/post/19450https://community.m5stack.com/post/19450Tue, 06 Dec 2022 13:21:24 GMT<![CDATA[Reply to ATOM DTU NB MQTT Example dosn't work on Mon, 05 Dec 2022 16:28:11 GMT]]>Hello @BennoB

have you tried to run the example without modification, e.g. connecting to mqtt.m5stack.com as a test? Does that work?

Thanks
Felix

]]>https://community.m5stack.com/post/19443https://community.m5stack.com/post/19443Mon, 05 Dec 2022 16:28:11 GMT