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General Mobile Robot Controller

SKU: DFR0271

The General Mobile Robot Controller (GMR) is a versatile control board designed for mobile robotics, supporting up to three microcontrollers including two Arduino Nano and one Arduino Mega or Mega ADK. The board is equipped with slots for wireless communications such as Xbee, Bluetooth, and Wifi, allowing simultaneous usage. One Arduino Nano is dedicated to controlling motors and encoders while the other manages up to six URM sensors. The main microcontroller, either Mega or Mega ADK, is responsible for data collection and executing control logic, making the GMR an ideal solution for developing sophisticated robotic systems.

Overhead shot of GMR controller motherboard with Ethernet and USB ports-DFRobot product sku:DFR0271 image.

Downloadable Resources

  • Tech Specs

    • Specification

    Parameter Value
    Operating Voltage (logic level) 5 V & 3.3V
    Input Voltage (recommended) 12-23 V
    Input Voltage (limits) 9-26 V
    Digital I/O Pins 8
    Analog Input Pins 8
    DC Current: 10A@5V

    Note: The lastest version has been compatible with the newest Arduino Nano V3 & V4.

    Pinout

    GGMR

    GMR2

    Motor and motor control

    G1

    This part includes some I/O pins of one of the Nano controllers which could be put into the GMR. The users can use them to connect the encoder and two kinds of motor controllers, D10 and D9 with a GND pin can be used for Saber tooth motor controller another 6pins together D9 D10 D8 with VCC and GND used for DC Motor Driver 2×15A - Lite D2 –D6 are used for the encoders.

    Nano slots

    G2

    There are 2 Nano slots on the GMR. For general mobile robot, this two micro controllers can help you to solve the motor control and driver some special sensors. And they all have connected with the main micro controller Mega ADK or Mega 2560. The communication way is the I2C.

    Mega ADK/2560

    G4

    The main controller of this GMR board. Because of the high performance of the Arduino Mega ADK/2560. For the GMR, 8 I/O and 8 analog pins can be used. 3 groups of I2C pins can communicated with other controllers and 2 groups of RS485 belongs to another nano controller。

    SD card slot

    G3

    Extra memory for the Mega

    Wireless slots

    G6

    Two wireless slots available which allow Xbee, blusteeth/Wifi to be used at the same time.

    Adjustable output

    G7

    An adjustable output

    Power Supply

    G5

    use 2 4 6 pins for Vin and 1 3 5 pins for GND Input Voltage (recommended) 7-20 V

    Diagram N2

    On board Nano2 is connected to the I2C stream, and (with jumpers plugged in) to the URM sensors via 485 protocol. GMR board integrates a 485 protocol encoder/decoder, and our URM ultrasonic sensors are also capable, thus allowing for an array of Ultrasound sensors to be connected. Nano on socket 2 will then process this information accordingly. If you wish, you can unplug the jumpers and directly connect 485 with jumper wires, to other pins, Allowing a different controller to drive the Ultrasound sensors.

    Nano2URM_wiring

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