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Evaluating NB-IoT and LTE-M with Raspberry Pi Part-2
The first part of this post explains how to set up a Raspberry Pi with a Sixfab “Cellular IoT HAT” extension board and prepare it for custom evaluation of an LTE-M or NB-IoT network. For this purpose, we introduced a Python program template that allows users to submit a sequence of AT control commands to the sixfab LTE-M/NB-IoT modem which is based on a Quectel BG96 network interface module. In this post, I will describe my own experience with cellular IoT trials in a difficult-to-reach area which represents a typical IoT location for device deployment: a room located below ground level with concrete walls where no standard cellular network can be used.
4 ways to send SMS to your devices manually and automatically
While Short Message Service (SMS) is increasingly less relevant for consumer communication thanks to the availability of messenger services such as Facebook, Whatsapp, and Threema, it remains relevant for communication between Things. One big reason being that SMS can be sent to a device even if no data connection is possible.
How access any IoT device or web server behind a Teltonika Networks router
Cellular connectivity is the most favorable way of connecting IoT devices. However, other use cases may encompass many local devices that do not need a SIM card but communicate with a gateway/router. The IoT router is therefore equipped with an emnify SIM and sends the aggregated data through a cellular network to the desired cloud service. Common examples are utility sensors in a building communicating with a smart meter gateway or web servers running in a local network behind a router. Having one device communicating with a platform via cellular connectivity increases efficiency and reduces complexity. But what if you wanted to remotely access a specific device behind the router, for troubleshooting or configuration purposes?