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Questions tagged [nb-iot]

NB-IoT (Narrowband IoT) is a 3GPP Low Power Wide Area Network cellular radio technology standard designed to cover low cost/long battery life use cases, especially for the Internet of Things and M2M.

Narrowband IoT (NB-IoT) is a Low Power Wide Area Network (LPWAN) radio technology standard developed by 3GPP to enable a wide range of cellular devices and services. The specification was frozen in 3GPP Release 13 (LTE Advanced Pro), in June 2016. Other 3GPP IoT technologies include eMTC (enhanced Machine-Type Communication) and EC-GSM-IoT.

NB-IoT focuses specifically on indoor coverage, low cost, long battery life, and high connection density. NB-IoT uses a subset of the LTE standard, but limits the bandwidth to a single narrow-band of 200kHz. It uses OFDM modulation for downlink communication and SC-FDMA for uplink communications.

Source: Wikipedia : Narrowband IoT (under CC BY-SA license)

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What's the escape character in AT-commands?

Im using a BG96 modem to connect to AWS iot over MQTT. I'm trying to set my MQTT Last Will and Testament with the following AT-command: +QMTCFG:"will",(0-5),(0,1),(0-2),(0,1),"willtopic","willmessage" Which works great. But now I'm trying to add a…
Jelmer
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SIMCOM SIM7080G certificate conversion error on AT+CSSLCFG command

I am using sim7080g https://www.waveshare.com/wiki/SIM7080G_Cat-M/NB-IoT_HAT , I am experiencing this certificate conversion issue. AT commands I am passing are as…
Dinesh Kumar K
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【ESP32/ NBIOT / AWS IOT】how to set three certification to connect aws iot with nbiot sim card?(using arduino IDE)

This problem has been bothering me for a long time... I'm using sim7020c and trying to connect aws iot with their three certifications, I have tried so many solutions which I searched from internet, but none of them work... I just can connect to net…
TonyChou
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UDP packets over NB-IoT

I'm trying to send UDP packets over the t-mobile NB-IoT network using AT-commands on a SIM7020E chip. I used the product wiki as reference. The starter version of the sim card I have doesn't support TCP, but I'm planning on using that later if I can…
Hans Koene
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NB-IoT signal quality query (operator independent)

I'm currently developing an NB-IoT application using Quectel's BC66, however, I'm still trying to decide what operator to use. After a successful connection, I can use the command AT+CSQ or AT+CESQ to find signal quality. But all this is assuming I…
Eduardo Rodrigues
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Can't change baudrate in SARA-N2 modem

I am using Ublox evaluation kit with SARA-N210. The factory set baudrate is 9600 and I am trying to change it to 115200 with at+natspeed=115200, but it immediately goes back to 9600. I read through the manual, and it says that to store at+natspeed…
annabanana
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Azure IoT Hub MQTT username and password character length limitation

I am trying to get data into Azure Iot-Hub using a SARA-R410-02B module (NB-IoT) via MQTT or HTTPS. Microsofts MQTT guide for IoT-Hub states that: For the Username field, use {iothubhostname}/{device_id}/?api-version=2018-06-30, where…
Miertz
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SIM7020E responds on AT+COPS=? with ERROR

HW: SIM7020E NB-IoT HAT (from waveshare) + RPI3B + NB-IOT SIM from Vodafone CZ. I am trying connect to NB-IOT network without success (automatic, manual), AT+COPS command show behavior that I don't understood. AT OK ATI SIM7020E…
stenliis
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error when publish data to aws IoT using BG96 and MQTT protocol

I'm trying to publish my data to Amazon web services using BG96 (NB-IoT device that use AT commands) I'm following the official documentation (Quectel) so I configure SSL parameters ( with the command : at+ qsslcfg=...) and start MQTT SSL…
Zou Beir
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I dont know if i have connection into NB-IoT

T+CPSI? 20:25:39.168 -> +CPSI: GSM,Online,202-01,0x0b57,21239,995 EGConnected to NB-IoT network. Do I have register succesful with NB-IoT or no? I tried the AT + CPSI and the message for Serial Monitor IS this : T+CPSI? 20:25:39.168 -> +CPSI:…
giorgos_polizos
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How the get the real download time (not request time) in .NET core web api

We have a .NET core WEB-API which have an endpoint that provide a file. The endpoint is called from NB-IoT devices (very low bandwidth). The download takes up to 2 miuntes (for 90KB). We want to track how long the download takes on the server. But…
Michael Eckhart-Wöllkart
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Problems making a HTTP request with SIMCOM module

For the past few weeks, i have been trying to make a HTTP request on a SIMCOM7080. I'm controlling this module via AT Commands. Every path that i try, ends with an ERROR. Does anyone have experience on getting this module to talk with for example…
Nick
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How to get certificate and convert for ESP32 to connect to paid HiveMQ broker?

I am trying to connect to the HiveMQ broker using ESP32, a SIM7020 NB-IoT module and the library Magellan_SIM7020E found at:https://github.com/AIS-DeviceInnovation/Magellan_SIM7020E. It requires an SSL certificate to be pasted in a header file with…
Christian
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HERE Network Positioning API v2 - NB-IoT position not found

I´m using a SIM Modul attached to a µC, registered in Vodafone Germany LTE Narrowband IoT network (=NB-IoT). I got confimation from Vodafone that their SIM Card is a global one and because of this, it does roaming (=national roeaming) all the time.…
AndyK
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SIM7020 - Error during execution of AT+CHTTPCON (based on example)

I have ordered a SIM7020 NB-IoT HAT from waveshare and I try to open an HTTP connection by using the example from the wiki. I use the following AT commands to connect the device with the NB-IoT…
Kampi
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