BoardPilotHM-10 Bluetooth Low Energy module with ESP32
Supply 3.3-5 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| STATE | Output (the part drives it) | D25 | HIGH when connected, optional |
| VCC | Power | 3V3 | Breakout with regulator: 3.3 to 6 V |
| GND | Ground | GND | |
| TXD | Output (the part drives it) | D26 | UART: the part sends data here. Connect to an ESP32 RX pin (9600 baud by default) |
| RXD | Input (the ESP32 drives it) | D27 | UART: the part receives data here. Connect to an ESP32 TX pin |
| BRK | Not wired to the ESP32 | — | Pull LOW to drop the connection, optional |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Sources
- JNHuaMao HM-10 Bluetooth 4.0 BLE module datasheet, UART 9600 baud default; AT commands; CC2541. Many clones exist (CC41-A, MLT-BT05)
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.