DFRobot DFR0351 Romeo BLE Mini Arduino Robot Control Board with Bluetooth 4.0

The Romeo BLE mini is a simplified version of the Romeo board. It inherits all the functions of the Romeo BLE. Moreover, it's smaller.

It has 8 digital pins, 4 analogue pins and integrates Bluetooth 4.0 wireless communication function. It can easily drive a mobile platform using two 1.2A H-bridged motor drivers to meet the needs of small scale robots. The Romeo BLE mini will prove to be a very good assistant to Makers. You can also check out the Bluetooth micro-controller selection guide to get more information.

Version update: V2.0 has an upgraded motor driver IC. It replaces the HR8833 with a TB6612 motor driver chip. The TB6612 has the same control logic as the L298 motor driver and the code is compatible with the Romeo robot control board. It also has 2 interrupt pins now, so you can connect encoders to make a PID motor control.

• Features:
• Supports Gravity 3-pin interface, colour-coded, compatible with servos and Gravity sensors & modules
• Supports external power supply automatic switch, can simultaneously use USB and external power supply
• Supports wireless download program / wireless communication function
• Supports mobile phone APP control
• Two-way H-bridged Motor Driver
• Support servo external power input
• Supports AT commands to configure BLE
• Supports serial transmission
• Supports master and slave switch

• Specification:
• BLE chip: TI CC2540
• Transmission distance: 30m (open area)
• Microprocessor: ATmega328P
• Board selection: Arduino UNO
• Flash: 32 KB (ATmega328P) of which 0.5KB used by boot-loader
• SRAM2: KB (ATmega328P)
• EEPROM: 1KB (ATmega328P)
• Clock frequency: 16MHz
• Digital I/O pins: 8
• PWM digital I/O pins: 4 (D3, D9, D10, D11)
• Analog input pins: 4
• Output current: 1.2A single-channel continuous drive current
• Start / peak current: 2A (continuous pulse) / 3.2A (single pulse)
• Motor drive pins: D4, D5, D6, D7
• microUSB connector 2x 2A H-bridge motor driver
• Size: 45 x 38.5mm