Romeo BLE Mini Control Board (DFR0351)
Compact ATmega328P robot controller with TI CC2540 Bluetooth 4.0, 8 digital and 4 analog pins, and dual H-bridge motor drivers rated 1.2 A continuous per channel. Designed for small mobile robots controllable via smartphone app; board measures 45×38.5 mm.
Pinout
- +VIN-Official table 2 row 1
Servo & Motor power input 6.5~10v
Type · power - +Servo-Official table 2 row 2
Digital port power input 5~12V
Type · power - M1 & M2 TerminalsOfficial table 2 row 3
2-Way Motor Controller: Motor 1 : PIN4 (Direction), PIN5 (PWM Speed) Motor 2 : PIN7 (Direction), PIN6 (PWM Speed)
Type · digital io - I2COfficial table 2 row 4
I2C interface (A4 & A5)
Type · i2c - A 5V GNDOfficial table 2 row 5
Gravity Analog Interface: A0, A1, A2, A3
Type · ground - D VCC GNDOfficial table 2 row 6
Gravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13；
Type · ground - LED lightOfficial table 2 row 7
PWR-power indicator TX/RX-Data transmissing/receiving indicator L-D13 led * LINK-Bluetooth link indicator PAIR-Bluetooth pair indicator
Type · power - RESETOfficial table 2 row 8
ATmega328P Reset button
Type · digital io - BOOTOfficial table 2 row 9
Used for update BLE Firmware
Type · pin
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| +VIN- | Official table 2 row 1 | power | Servo & Motor power input 6.5~10v | |
| +Servo- | Official table 2 row 2 | power | Digital port power input 5~12V | |
| M1 & M2 Terminals | Official table 2 row 3 | digital io | 2-Way Motor Controller: Motor 1 : PIN4 (Direction), PIN5 (PWM Speed) Motor 2 : PIN7 (Direction), PIN6 (PWM Speed) | |
| I2C | Official table 2 row 4 | i2c | I2C interface (A4 & A5) | |
| A 5V GND | Official table 2 row 5 | ground | Gravity Analog Interface: A0, A1, A2, A3 | |
| D VCC GND | Official table 2 row 6 | ground | Gravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13； | |
| LED light | Official table 2 row 7 | power | PWR-power indicator TX/RX-Data transmissing/receiving indicator L-D13 led * LINK-Bluetooth link indicator PAIR-Bluetooth pair indicator | |
| RESET | Official table 2 row 8 | digital io | ATmega328P Reset button | |
| BOOT | Official table 2 row 9 | pin | Used for update BLE Firmware |
Start wiring
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: +VIN-, +Servo-, LED light, A 5V GND, D VCC GND, I2C. Schematik maps them to your board in the app.
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