Board map
Pin Definition:
| Pins | Note | Logic |
|---|---|---|
| DTX / DRX | Debug TXD and RXD | (via logic shifter) |
| TXD / RXD | UART Serial TXD and RXD (AT commands) | (via logic shifter) |
| ATX / ARX | RXD and TXD AUX | |
| 1PPS | (via logic shifter) | |
| RI / DCD / RTS / CTS | RS-232 Pins | (via logic shifter) |
| DM / DP | USB Port | |
| VUSB3 | VDD USB 3.3V | |
| USBM | USB_MODE | |
| ADC | ||
| MKEY MRST MINT | MCU Control Boot pin, Reset pin, Interrupt pin | |
| +5V | need external supply | |
| 3V3 | from board LDO |
Quick Wiring
- Connect VIN GND TXD RXD to send AT Commands
LEDs
- Both on board LEDs may NOT work due to the module developing firmware, LEDs reserved for future functions only
Specifications
- Hardware version - BC20NA-04-STD
- Band B5 B8
- Location supports GPS Beidou SBAS
Usage
Sleep Mode
- Module should automatically enter into sleep mode periodically 60 seconds
- Wake up by AT commands serial input, or pressing button
- Please check relevants documents or contact us if you have any other questions.
ref
-
SDK documents - https://github.com/Edragon/quectel-BC20
-
at commands refer to quectel-at-dat
-
legacy wiki page - https://w.electrodragon.com/w/Category:BC20