RMonitoringUnit - device for collecting data from refrigerators

A device was developed for collecting data from sensors of refrigeration systems and transmitting this data to a server for further visualization and analysis. Elecrow Arduino Leonardo IoT sim800C and ESP32 GSM/GPRS sim800H microcontrollers, thermistors, and Danfoss pressure sensors were used, as well as sd-card modules (connected via SPI) and RTC (connected via I2C), as well as LCD (connected via I2C). The firmware was written in C++ using the Arduino framework.