TCP Socket Keepalive Astra Telematics IoT devices, like many others, communicate with the host server using TCP sockets.  Once the socket has been opened, the connection is maintained between the IoT device and the server, so that either side can send and receive data at any moment.  A TCP socket can therefore be described as

Roaming SIMs and Automatic Network Selection Open roaming SIMs are widely used today in IoT and telematics applications, for good reasons.  Coverage is extended by allowing access to all (or at least several) network operators in any given country, with obvious benefits for real-time communications in almost any location.  However, there can be problems with

Lets talk about batteries Astra Telematics devices are powered-on by inserting the SIM, and should not be left for long periods with SIM inserted without external power, to avoid deep discharge of the battery. However, this aspect still regularly gets overlooked and we see a lot of devices returned for RMA repair with SIM inserted,