Description Waveshare R800C GSM/GPRS HAT is a compact Raspberry Pi GSM HAT built for 2G calling, GPRS communication, and dependable SMS control. This Waveshare board uses the onboard R800C GSM/GPRS HAT design to give Raspberry Pi and other embedded hosts a practical way to send text alerts, open basic data sessions, and build low-bandwidth mobile nodes where 2G service is still available. The Waveshare R800C GSM/GPRS HAT is especially useful when SMS control matters more than high-speed data. As a Raspberry Pi GSM HAT, it gives you UART access, a SIM slot, an audio interface, and easy AT-command control for alarms, remote terminals, simple telemetry, and GPRS communication in the field. Waveshare R800C GSM/GPRS HAT overview for a compact Raspberry Pi GSM HAT deployment. Features Waveshare R800C GSM/GPRS HAT with onboard R800C 2G module. Raspberry Pi GSM HAT layout with standard 40PIN GPIO header. Supports calls, SMS control, text messaging, and GPRS communication. AT-command workflow for alarm systems, remote switching, and low-bandwidth data links. UART interface for Raspberry Pi, Arduino, STM32, Jetson Nano, and other embedded hosts. SIM card slot, audio jack, indicator LEDs, and switchable 3.3V / 5V logic support. Specifications Item Details Brand Waveshare Model R800C GSM/GPRS HAT Board Type Raspberry Pi GSM HAT Main Module R800C Network GSM / GPRS Frequency Bands 850 / 900 / 1800 / 1900 MHz GPRS Speed Up to 85.6 kbps uplink / downlink Functions Calls, SMS control, text messaging, GPRS communication, AT commands Host Interface UART + Raspberry Pi 40PIN header Logic Level 3.3V / 5V selectable Power Supply 5V Dimensions 30.2 x 65 mm Applications SMS control nodes for alarms, message alerts, and remote switching. Raspberry Pi GSM HAT projects in regions with active 2G coverage. GPRS communication for telemetry, remote monitoring, and lightweight cloud reporting. Waveshare text-alert systems and embedded phone-call terminals. R800C GSM/GPRS HAT projects that need stable 2G mobile communication without a larger LTE modem. Product List R800C GSM/GPRS HAT x1 GSM antenna x1 RPi screws pack (2 pcs) x1 Other Content SMS control and call handling on the Waveshare R800C GSM/GPRS HAT. Waveshare R800C GSM/GPRS HAT hardware overview. Raspberry Pi GSM HAT pinout and interface definition for the Waveshare R800C GSM/GPRS HAT. Waveshare R800C GSM/GPRS HAT dimensions. Resources Waveshare R800C GSM/GPRS HAT Wiki R800C Hardware Design PDF R800C AT Command Manual R800C Series Specification PDF Schematic PDF FAQ What does this Waveshare board do?The Waveshare R800C GSM/GPRS HAT adds calling, SMS control, and GPRS communication to Raspberry Pi and other embedded controllers. Is this a Raspberry Pi GSM HAT or a 4G board?This is a Raspberry Pi GSM HAT for 2G GSM/GPRS networks, not a 4G LTE board. Can the R800C GSM/GPRS HAT be controlled with AT commands?Yes. The R800C GSM/GPRS HAT supports standard AT command workflows for SMS control, calls, and GPRS communication. Where is this Waveshare board best used?It is best used in regions with active 2G coverage where simple SMS control and low-bandwidth GPRS communication are still practical.
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