Arduino Mega 2560, BME280, GPS Neo 6M, GSM module sim900, 2 chanel relay module
Municipal potable water tank monitoring: the system consists of a Raspberry B+ with UPIS power backup, a Teltonika twct22 controller, a USB<-->RS232 converter and a 3G USB stick (huawei modem firm), recorded parameter is 3G signal, refresh rate ~20sec