The LILYGO TTGO T-Call V1.3 ESP32 Wireless GPRS Antenna SIM Card SIM800H Module is a compact yet powerful development board that combines the ESP32 microcontroller with the SIM800H GSM/GPRS module. This versatile board is perfect for IoT applications that require both Wi-Fi and cellular connectivity. With built-in support for SIM cards, it allows for mobile data communication, including SMS, voice calls, and GPRS-based internet access. Key features include the integration of the ESP32’s dual-core processor for efficient computing and multitasking, paired with the SIM800H module for reliable 2G GSM communication. The SIM800H module supports data transfer over GPRS networks, enabling a wide range of remote connectivity applications. The module also includes a built-in antenna for improved signal reception, ensuring better performance in communication tasks. This board is ideal for creating mobile-connected IoT devices, remote monitoring systems, and real-time communication applications, all while being compatible with the Arduino IDE for easy development and deployment.