Product Description: SIM7028 Expansion Board for Raspberry Pi 2 2B 3B 3B+ 4B Unlock the full potential of your Raspberry Pi with the SIM7028 Expansion Board, designed to provide seamless global communication capabilities. This versatile board is perfect for developers and hobbyists looking to enhance their projects with GSM connectivity. 1. Scope of Application The SIM7028 expansion board is compatible with Raspberry Pi models 2, 2B, 3, 3B+, and 4B. It supports a wide range of communication protocols, including TCP, UDP, LWM2M, COAP, DTLS, DNS, NTP, HTTP(S), MQTT(S), and TLS/SSL. This extensive functionality allows you to create robust IoT applications, remote monitoring systems, and more. 2. Type C Interface Equipped with a Type C interface, this expansion board facilitates easy software debugging and firmware updates. The onboard UART interface allows for straightforward AT command sending and receiving, making it simple to manage your GSM communication and ensure optimal performance. 3. USB to UART Chip The SIM7028 features a built-in USB to UART chip, providing flexible communication options. The UART communication pins can be configured via a jumper cover, allowing for customization based on your project needs. Additionally, the onboard nano SIM card slot supports special cards, and control pins can be accessed for integration with STM32 and other main control boards. 4. Support AT Command Control This expansion board fully supports AT command control, adhering to 3GPP TS 27.007 and 27.005 standards, as well as an enhanced AT command set. It also supports the SIM Application Toolkit (SAT Class 3, GSM 11.11, USAT), enabling advanced functionalities for your applications. 5. Support Serial Baud Rate The HAT expansion board accommodates a wide range of serial baud rates, from 2400bps to 460900bps, with a default setting of 115200bps. This flexibility ensures compatibility with various devices and applications, allowing you to tailor the communication speed to your specific requirements. Elevate your Raspberry Pi projects with the SIM7028 Expansion Board. Whether you're developing IoT solutions, remote monitoring systems, or any application requiring reliable GSM communication, this expansion board is your gateway to global connectivity. Order now and take your projects to the next level!