The Zumo 2040 is a highly integrated, user-programmable and customizable tracked robot. It measures less than 10 cm on each side and weighs approximately 275 g with batteries (160 g without), so it is both small enough and light enough to qualify for Mini-Sumo competitions, but its versatility makes it capable of much more than just robot sumo battles.

At the heart of the Zumo 2040 is a Raspberry Pi RP2040 microcontroller (like the one on the Raspberry Pi Pico), a 32-bit dual-core Arm Cortex-M0+ processor running at 125 MHz, which can be programmed with C, C++, Arduino, or Python. The Zumo 2040 has 16 MB (128 Mbit) of flash memory that ships preloaded with a MicroPython interpreter, so you can get started right away by plugging into its USB-C port and editing the included example Python programs. For advanced users who want to customize or enhance their robots with additional peripherals, the robot’s power rails and microcontroller’s I/O lines can be accessed via 0.1″-spaced through-holes along the sides and front of the main board. A 4-pin JST SH-compatible connector provides access to the RP2040’s I2C0 bus and can be used with many Sparkfun Qwiic and Adafruit STEMMA QT devices.

Assembled Zumo 2040 robot, front view.

Assembled Zumo 2040 robot, side view.

Assembled Zumo 2040 robot, back view.

The Zumo 2040 features two H-bridge motor drivers and a variety of integrated sensors, including a pair of quadrature encoders for closed-loop motor control, a complete inertial measurement unit (3-axis accelerometer, gyro, and magnetometer), five downward-facing reflectance sensors for line-following or edge-detection, and front- and side-facing proximity sensors for obstacle detection and ranging. Three on-board pushbuttons offer a convenient interface for user input, and a 128×64 graphical OLED display, buzzer, and six RGB LEDs allow the robot to provide feedback.

Zumo 2040 Robot features, top view.

Zumo 2040 Robot features, bottom view.

The Zumo 2040 robot is available fully assembled with three different motor options (see the Motors section below for more information on how these different gear ratios perform):

• Assembled with 50:1 HP motors — highest speed and lowest torque of the three options
  
• Assembled with 75:1 HP motors — average speed and torque
• Assembled with 100:1 HP motors — highest torque and lowest speed

The Zumo 2040 robot is also available as a kit (without motors) for those who would prefer to assemble it themselves or who want to use different motors than those in the three assembled versions.

Contents of the Zumo 2040 robot kit.

With the exception of motors, batteries, and a USB-C cable, this kit contains everything necessary to build and operate a Zumo 2040 robot:

• Zumo Chassis Kit
  
• Zumo 2040 Main Board (this includes two magnetic encoder discs that work with encoder sensors integrated into the main board and a through-hole buzzer)
• Zumo 2040 Front Sensor Array
• stainless steel Zumo Windowed Blade and plastic IR LED holder
• graphical OLED display

See the Zumo 2040 robot user’s guide for detailed assembly instructions.

Details for item #5011:

The Pololu Zumo 2040 robot is a versatile tracked robot based on the Raspberry Pi RP2040 MCU. This version includes two 50:1 HP micro metal gearmotors along with integrated dual motor drivers, quadrature encoders, line sensors, side and front proximity sensors for detecting objects, a full IMU for detecting impacts and tracking orientation, six RGB LEDS, and a graphical OLED display. The low-profile robot is less than 10 cm × 10 cm—small enough to qualify for Mini Sumo. No soldering or assembly is required; just add 4 AA batteries and connect it to a computer with a USB-C cable and your Zumo is ready for programming.

This version of the Zumo 2040 robot (item #5011) ships fully assembled with a pair of 50:1 HP micro metal gearmotors (with extended motor shafts). As described above, two assembled versions are also available with higher gear ratios (so they are both slower but able to deliver more torque).

Assembled Zumo 2040 robot.

Details for item #5012:

The Pololu Zumo 2040 robot is a versatile tracked robot based on the Raspberry Pi RP2040 MCU. This version includes two 75:1 HP micro metal gearmotors along with integrated dual motor drivers, quadrature encoders, line sensors, side and front proximity sensors for detecting objects, a full IMU for detecting impacts and tracking orientation, six RGB LEDS, and a graphical OLED display. The low-profile robot is less than 10 cm × 10 cm—small enough to qualify for Mini Sumo. No soldering or assembly is required; just add 4 AA batteries and connect it to a computer with a USB-C cable and your Zumo is ready for programming.

Assembled Zumo 2040 robot.

This version of the Zumo 2040 robot (item #5012) ships fully assembled with a pair of 75:1 HP micro metal gearmotors (with extended motor shafts). As described above, two assembled versions are also available, one with a higher gear ratio that is slower but can deliver more torque and one with a lower gear ratio that is faster but delivers less torque.

Details for item #5013:

The Pololu Zumo 2040 robot is a versatile tracked robot based on the Raspberry Pi RP2040 MCU. This version includes two 100:1 HP micro metal gearmotors along with integrated dual motor drivers, quadrature encoders, line sensors, side and front proximity sensors for detecting objects, a full IMU for detecting impacts and tracking orientation, six RGB LEDS, and a graphical OLED display. The low-profile robot is less than 10 cm × 10 cm—small enough to qualify for Mini Sumo. No soldering or assembly is required; just add 4 AA batteries and connect it to a computer with a USB-C cable and your Zumo is ready for programming.

This version of the Zumo 2040 robot (item #5013) ships fully assembled with a pair of 100:1 HP micro metal gearmotors (with extended motor shafts). As described above, two assembled versions are also available with lower gear ratios (so they are both faster but cannot deliver as much torque).

Assembled Zumo 2040 robot.

Batteries (not included)

The Zumo robot runs off of four AA batteries. It works with both alkaline and NiMH batteries, though we recommend using rechargeable AA NiMH cells.

Optional accessories:

• Even more sensors
• Connectors (headers, jumper wires, etc) for adding those sensors or other peripherals
• Tools (diagonal cutters, pliers, screwdrivers, etc) to help with kit assembly
• Replacement sprockets in red or white. The Zumo 2040 robot includes black sprockets, but other colors can be purchased separately if you want to add a bit of personalization to your robot. (The pictures below show how these sprockets look on the similar Zumo 32U4 robot.)

Zumo 32U4 robot with black sprockets.

Zumo 32U4 robot with red sprockets.

Zumo 32U4 robot with white sprockets.

Package Includes:

• 1 x Pololu 5011 / 5012 / 5013 Zumo 2040 Robot (Assembled with  50:1/ 75:1/ 100:1 HP Motors)