Compact quad-band GSM breakout (850/900/1800/1900 MHz) based on the SIM800, supporting voice, SMS, and GPRS data over UART at 2.8–5V logic. Includes FM radio, LiPo charging, and a headphone jack; requires an external SIM card and battery.
| Pin | Type |
|---|---|
| Vio | Power |
| VBAT | Power |
| GND | Ground |
| Key | Control |
| PS | Signal |
| NS | Signal |
| Reset | Control |
| RX | UART |
| TX | UART |
| RI | Signal |
| SPK+ | Signal |
| SPK- | Signal |
| MIC+ | Signal |
| MIC- | Signal |
| PWM | PWM |
| Buzzer | Control |
| ADC | Analog |
| 5V | Power |
UART · USB · Breakout
Verify supply voltage and logic levels before powering up.
Module pins: Vio, VBAT, 5V, GND, PS, NS, RX, TX. Schematik maps them to your board in the app.
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