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 · GPIO - 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 · Control - BOOTOfficial table 2 row 9
Used for update BLE Firmware
Type · Control
| Pin | Position | Type | Function |
|---|---|---|---|
| +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 | GPIO | 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 | Control | ATmega328P Reset button |
| BOOT | Official table 2 row 9 | Control | Used for update BLE Firmware |
Pin details
9 connections- +VIN-Official table 2 row 1
Servo & Motor power input 6.5~10v
Power - +Servo-Official table 2 row 2
Digital port power input 5~12V
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)
GPIO - I2COfficial table 2 row 4
I2C interface (A4 & A5)
I2C - A 5V GNDOfficial table 2 row 5
Gravity Analog Interface: A0, A1, A2, A3
Ground - D VCC GNDOfficial table 2 row 6
Gravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13；
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
Power - RESETOfficial table 2 row 8
ATmega328P Reset button
Control - BOOTOfficial table 2 row 9
Used for update BLE Firmware
Control
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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