GPRS-A is a universal monitoring module that can work as a stand-alone device or as part of intruder alarm systems as well as automation systems. The device is provided with a GSM telephone that supports data transmission in 2G technology.

In the alarm systems, this module can be used to implement reporting, in conjunction with any alarm control panel. It connects to the control panel with the control panel dialer or appropriately configured outputs.

The device has 8 inputs, which can be set as digital (NO, NC) or analog. Those that work as analogue ones can be used in automation systems or to monitor a wide range of external devices, such as temperature, pressure and humidity sensors. Additionally, GPRS-A has a 1-Wire bus, to which up to 8 DS-T1 digital temperature sensors can be connected. The module can send measurement data using the MQTT, JSON and MODBUS RTU open communication protocols, via GPRS. It is possible to create a server that will collect data from many modules. Gathered informations can be used for processing and visualization – e.g. to supervise environmental parameters prevailing in a group of cold stores, warehouses or production halls. This fits in with the concept of the so-called Internet of Things (IoT). In response to exceeding the preset threshold values of signals on analog inputs or from 1-Wire sensors, GPRS-A may respond by reporting such events to the monitoring station or send a notification to the indicated users. It allows to program an automatic reaction consisting in changing the status of selected outputs, e.g. by switching on the heating system due to a significant temperature drop.