EC200U + STM32F103C8T6 + ESP32-S3 Development Board is an integrated cellular IoT development platform combining 4G LTE, real-time STM32 control and Wi-Fi/Bluetooth connectivity. The board provides a flexible architecture for developing connected industrial, automation and IoT applications with local control, wireless communication and cloud connectivity.
SIM800C GSM/GPRS Development Board is a 2G cellular communication platform that provides SMS, voice and GPRS data connectivity to embedded systems. With UART and AT-command support, it can be easily interfaced with Arduino, ESP32, STM32 and other microcontrollers for remote monitoring and IoT applications.
The M66 provides reliable 2G GSM/GPRS connectivity for applications that need cellular communication without Wi-Fi or wired Internet. It supports GPRS data rates up to 85.6 kbps and includes built-in Internet protocols such as TCP/UDP, FTP and PPP.