Compact breakout combining a quad-band GSM module (850/900/1800/1900 MHz) with an MT3336 GPS receiver (2.5 m accuracy, 30 s cold start) on a single board. UART interface, 2.8–5V logic, onboard LiPo charging, and TRRS audio jack.
| Pin | Type |
|---|---|
| VIO | Power |
| 5V | Power |
| GND | Ground |
| KEY | Control |
| RST | Control |
| RX | UART |
| TX | UART |
| RTS | UART |
| CTS | UART |
| DTR | Signal |
| RI | Signal |
| PS | Signal |
| NS | Signal |
| SPK+ | Signal |
| SPK- | Signal |
| MIC+ | Signal |
| MIC- | Signal |
UART · I2C · USB · 3.3 – 5 V · Breakout
Confirm the data interface matches your host board.
Module pins: VIO, 5V, GND, RX, TX, RTS, CTS, DTR. Schematik maps them to your board in the app.
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