Romeo BLE Quad - A STM32 Robot Controller with Quad DC Motor Driver/Encoder/BLE

Introduction
Romeo BLE Quad is an arduino compatible robot controller based on STM32 ARM chip. It inherits all features from the Bluno M3, including wireless programming support, wireless communication between iOS/Android apps and remote control. Beyond this it also includes a 4-way DC motor driver and encoder interfaces. You can implement a robot with PID closed-loop feedback control directly with our TT Geared Motor.
As well as this the Romeo BLE Quad offers powerful performance thanks to the STM32 ARM 32-bit microcontroller with more storage space and more interface resources. DFRobot has developed bespoke firmware to make it compatible with Arduino IDE and accessible to beginners to robotics.
The board includes 10 digital and 5 analog I/O pins that are independent of the motor driver pins. The board also includes a series of "Gravity"interface pins that are marked with different colors to easily differentiate analog and digital I/O pins as well as including extra power and ground connections for devices. The Gravity interface is colored as follows:
Redindicates power
Black indicates ground
Blue indicates Analog Input Pin
Green indicates Digital I/O Pin
The Gravity interface is directly compatible with DFRobot Gravity sensors and modules. An external servo barrel jack connector supplies power for higher power devices. If you want to build your own robot, this is probably the best robot controller board available!
Note: The Operating voltage of Romeo BLE Quad is 3.3V, please read the wiki Board Overview carefully before usage!
Features
Supports Arduino IDE/Arduino C
Supports Bluetooth Wireless Communications/Programming
Supports Android and iOS applications, open source code, suitable for secondary development by the user
Supports AT commands to configure BLE
Upgradable firmware
4WD Support
Specification
Microcontroller: STM32 F103RET6
Clock Speed: 72 MHZ
Bluetooth Chip: TI CC2540 (Bluetooth 4.0)
Communication Range: 30m
Operating Voltage: 3.3V
DC Supply: USB Powered or External 7V~10V DC
DC Motor: 4 way
Supports USB and external power supply automatic switching
Digital I/O Pins: 10
Analog I/O Pins: 5
I2C/IWC: 30 (Default SDA), 29 (Default SCL)
SRAM: 64k
Flash: 512K (Customizable Flash assignment, refer to Flash chapter for more info)
Default User Code repository: 492K
Default User Data repository: 20KA
Serial Port: 2 (Serial1, Serial3)
Serial1 0 (Rx1) and 1 (Tx1)
Serial3 30 (Rx3), and 29 (Tx3)
Size: 67 x 42 (mm)
Weight: 54g
Shipping List
Romeo BLE Quad - A STM32 Robot Control Board x1
JST PH2.0-4Pin encoder wire x4
JST PH2.0-2Pin motor wire x4
PH2.0-2Pin to XH2.54-2Pin power wire x2