AT Commands Guide for GSM
Let's take a deep dive into the world of AT Commands: what are they and what are the most common AT commands for 2G, 3G and 4G cellular modules? We will try to answer these and many more questions in this complete guide about AT commands for cellular networks. AT Command Guide - Table of Contents What are AT commands? What can AT commands be used for? What is the syntax of AT commands? Do different modules and vendors have different AT commands? How do I identify proprietary AT commands? How do I find the AT commands my modem supports? My AT-command only responds with ERROR - how do I get more info? Basic commands to get information about the modem and SIM card Removing or adding SIM PIN via AT commands AT commands for network selection and configuration AT commands for radio signal quality analysis AT commands to establish a PDP context / data session Final thoughts
AT Commands Cheat Sheet for Cellular IoT Communication
The very thing that provides connectivity to your IoT devices is: a modem. Naturally the first step of entering the Internet of Things is connecting your hardware to a modem. This connection is achieved with the help of a set of commands called AT commands. In this blog post, you will find a cheat sheet of AT commands to get started with your cellular IoT solutions.
Evaluating NB-IoT and LTE-M with Raspberry Pi
LPWAN (Low Power Wide Area Network) technologies are key enablers for IoT applications and Cellular IoT (“CIoT)” is considered one of the most attractive approaches. CIoT works in the licensed frequency spectrum and current main streams are based on LTE technology and tailored to the needs of IoT. In particular, NB-IoT ("Narrowband – IoT") and LTE-M ("Long Term Evolution for Machines") are good choices for mission-critical monitoring or object tracking applications which are infrequently transmitting small data packages and also can be used for wearable devices with an extremely low power budget. In this post, we will explain an approach to evaluate an NB-IoT or LTE-M network with a Raspberry Pi - Installation and User Interface.