Reference

Library

• Arduino libraries for Romeo BLE Quad: Motor.h arduino library and PID_V1.h Arduino library
• How to install Libraries in Arduino IDE

Communication Protocol Description

• Supports AT commands to configure BLE

Other Supplementary Information

• Schematic
• Bluno M3 wiki page
• HR8833 motor driver

Note: Romeo BLE Quad integrates 2x HR8833 motor driver, the driving method is a little different to the common L298 motor controller, you can check the detail here: Dual 1.5A Motor Driver - HR8833 SKU: DRI0040
Recommend fast decay mode. (Encapsulated in the library)
Forward: GPIO 1 = Low (Direction); GPIO 2 = PWM (Speed)
Reverse: GPIO 2 = Low (Direction): GPIO 1 = PWM (Speed)