Communication module with R800C chip designed for Raspberry Pi minicomputers. It allows you to add support for 2G GSM/GPRS networks to your project. It supports SMS, GPRS, TCP/IP, DTMF, HTTP, FTPI and phone call communication. The HAT module communicates via the UART interface (via AT commands), so it can also work with other development boards. In addition, a built-in 3.3V/5V voltage level converter adds to the flexibility. The module's operating status is indicated by two LED indicators. It will find application in projects requiring cellular network communications. Full documentation is available on the product page.

| 1. Moduł R800C | 8. Złącze audio Jack 3,5 mm |
| 2. Stabilizator 3,3 V | 9. Złącze goldpin R800C |
| 3. Układ zasilania MIC29302 | 10. Złącze anteny GSM |
| 4. Konwerter poziomów napięć 3,3V/5V | 11. Gniazdo karty SIM |
| 5. Złącze GPIO 40-pin | 12. Przełącznik zasilania R800C |
| 6. Zworka wyboru napięcia | 13. Wskaźnik połączenia GSM |
| 7. Zworka zasilania | 14. Wskaźnik zasilania |
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