GSM

Integrated solution for IoT projects with 4G connectivity and external load control, based on STM32F103 and Air780E LTE Cat.1 bis module with AT firmware and low idle power consumption. Includes two 5V relays controlled from PA4 and PA5, flip-up Nano SIM slot with 4G antenna and network status LED. Simple 5V power supply via USB Type-C or KF128 terminal, easy programming via SWD or USART.

Compact solution for GSM connectivity in automation and prototyping projects, it allows SMS, voice calls, and GPRS data transfer via AT commands. It connects directly to a PC via 5V USB thanks to the CH340T and appears as a virtual serial port. It works globally on quad band 850 900 1800 1900 MHz, includes Bluetooth and an SMA connector for the antenna, compatible with Arduino, STM32 and ESP32.

Development board for communications and localization, ideal for IoT and telemetry projects. It offers quad-band GSM GPRS, precise GPS with fast fix, and Bluetooth, with control via AT commands over UART with autobaud. The UART logic level is selectable at 1.25V, 3.3V, or 5V via VMCU, compatible with Arduino, STM32, ESP32, and Raspberry Pi. Includes GSM and GPS antennas.