Pololu 4991 / 4992 / 4993 Zumo 32U4 OLED Robot - Assembled
Pololu 4991 / 4992 / 4993 Zumo 32U4 OLED Robot - Assembled
Pololu 4991 / 4992 / 4993 Zumo 32U4 OLED Robot - Assembled
The Pololu Zumo 32U4 OLED is a fully assembled, Arduino-compatible mobile robot platform built around the ATmega32U4 microcontroller with integrated OLED display for real-time feedback and diagnostics. Roboticists, embedded systems engineers, and educational institutions use this platform to develop autonomous navigation algorithms, line-following systems, and obstacle avoidance behaviors with immediate visual monitoring capabilities. This assembled unit eliminates construction complexity while delivering a production-ready platform for testing motor control algorithms, sensor fusion techniques, and competitive robot programming without soldering or assembly delays.
Product Overview
The Zumo 32U4 OLED combines a powerful 16 MHz ATmega32U4 processor with dual micro metal gearmotors, a 128x32 pixel OLED display, and comprehensive onboard sensor integration in a compact 10 cm chassis. The microcontroller features native USB connectivity for programming and debugging, eliminating the need for external programmers. The OLED display provides real-time sensor readings, battery voltage monitoring, and program status visualization, enabling rapid development iteration and troubleshooting without serial terminal dependencies. The platform includes a 3-axis accelerometer, gyroscope, compass, and proximity sensors for sophisticated autonomous behaviors.
Pre-assembled construction means the motor drivers, power distribution, and sensor calibration are factory-optimized, reducing setup time from hours to minutes. The dual-motor configuration with individual PWM speed control enables precise differential steering for maze navigation and line-following competitions. The 100 mAh lithium polymer battery provides 2-3 hours of continuous operation, while the integrated charging circuit supports USB-powered development sessions. The open-source Arduino IDE compatibility and extensive Pololu libraries enable rapid prototyping of complex robotic behaviors without proprietary development environments.
Key Specifications
| Specification | Details |
| Product Type | Assembled Mobile Robot Platform |
| Brand | Pololu |
| Microcontroller | ATmega32U4 at 16 MHz with 32 KB Flash, 2.5 KB SRAM |
| Display | 128x32 pixel monochrome OLED with I2C interface |
| Motors | Dual 50:1 micro metal gearmotors with 6V rated voltage |
| Motor Drivers | Integrated DRV8838 dual H-bridge with PWM speed control |
| Sensors | 3-axis accelerometer, 3-axis gyroscope, compass, 5x IR proximity sensors |
| Battery | 100 mAh lithium polymer with integrated charging circuit |
| Connectivity | Native USB 2.0 for programming and power |
| Dimensions | 100 mm x 80 mm x 40 mm chassis |
| Weight | Approximately 65 grams with battery |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- Fully Assembled and Tested: Factory-calibrated motors, sensors, and electronics eliminate construction time and ensure consistent performance from first power-on
- OLED Display Integration: Real-time sensor monitoring and program status visualization without external serial connections, enabling rapid algorithm debugging
- Arduino-Compatible Programming: Native ATmega32U4 processor runs standard Arduino IDE sketches with extensive Pololu-provided libraries for motor control and sensor access
- Comprehensive Sensor Suite: Integrated accelerometer, gyroscope, magnetometer, and five IR proximity sensors enable autonomous navigation and obstacle detection without external modules
- Dual Motor PWM Control: Independent speed control of each motor via integrated DRV8838 driver for precise differential steering and maze navigation
- USB Powered Development: Direct USB connectivity supports programming, debugging, and power delivery for extended development sessions without battery swapping
- Compact Chassis Design: 100 mm x 80 mm footprint optimized for competition courses and educational robotics challenges
- Lithium Polymer Battery: 100 mAh capacity with integrated charging circuit provides 2-3 hours runtime and charges via USB
Applications and Use Cases
- Line-Following Robotics Competitions: Use integrated IR sensors and OLED display to develop and test line-detection algorithms with real-time feedback on sensor readings and motor speeds for IEEE or school robotics competitions
- Autonomous Maze Navigation: Implement simultaneous localization and mapping using the 3-axis gyroscope and accelerometer to navigate unknown maze environments with wall-following and dead-reckoning algorithms
- Educational Robotics Curriculum: Teach embedded systems, motor control, and sensor fusion to engineering students with a complete, pre-assembled platform requiring only software development and algorithm optimization
- Obstacle Avoidance Research: Develop reactive control algorithms using the five IR proximity sensors to implement collision avoidance behaviors and test different sensor fusion techniques for autonomous mobile robots
- Swarm Robotics Prototyping: Deploy multiple Zumo units for multi-robot coordination experiments, utilizing the compact form factor and Arduino compatibility for distributed control algorithms
- Gesture and Motion Recognition: Leverage the 3-axis accelerometer and gyroscope to detect robot orientation, collision impacts, and movement patterns for interactive robotics applications
How to Use
Begin by charging the integrated lithium polymer battery via USB connection to your computer or USB power adapter for 2-3 hours until the charging LED indicates completion. Connect the Zumo 32U4 to your computer via the USB cable, which will appear as a COM port and allow the Arduino IDE to recognize it as an ATmega32U4 board. Install the Pololu AVR C/C++ Library and example sketches from the Pololu GitHub repository, which include pre-written code for motor control, sensor reading, and OLED display management. The OLED display will show battery voltage and sensor values once powered, confirming successful hardware initialization.
Program the robot using the Arduino IDE with standard C++ syntax, utilizing the Pololu libraries to access motors via PWM commands, read sensor values from the accelerometer and IR sensors, and display debug information on the OLED screen. Test motor functionality by uploading simple speed control sketches that display motor PWM values on the OLED, allowing you to verify both motors operate at expected speeds. Develop your autonomous behavior algorithms incrementally, using the OLED display to monitor sensor readings and motor commands in real-time, then refine parameters based on observed robot performance. Place the robot on your target surface (line-following course, maze, or open area) and execute your program, using the OLED feedback to adjust sensor thresholds and motor speeds until the desired behavior is achieved.
Frequently Asked Questions
What programming languages and development environments does the Zumo 32U4 OLED support?
The Zumo 32U4 OLED is fully compatible with the Arduino IDE and supports standard C++ sketches. Pololu provides comprehensive Arduino libraries that abstract the ATmega32U4 hardware, including motor control functions, sensor reading routines, and OLED display drivers. Advanced users can also program directly in AVR C using Atmel Studio or WinAVR toolchains, accessing lower-level hardware registers for performance-critical applications. The native USB interface provides both programming capability and serial communication for debugging without external hardware programmers.
How accurate are the integrated sensors for autonomous navigation?
The 3-axis accelerometer and gyroscope provide sufficient accuracy for dead-reckoning over short distances, typically maintaining 5-10% positional error over 1-2 meter traversals before drift becomes significant. The magnetometer enables heading reference with approximately 5-10 degree accuracy depending on local magnetic field disturbances. The five IR proximity sensors detect obstacles at 10-30 cm range with reasonable consistency for reactive obstacle avoidance, though performance varies with surface reflectivity. For competition-grade maze navigation, most teams combine these onboard sensors with line-detection algorithms using the IR sensors, achieving reliable performance without external positioning systems.
Can I extend the Zumo 32U4 OLED with additional sensors or modules?
Yes, the ATmega32U4 exposes multiple GPIO pins, I2C and SPI buses, and analog inputs through the robot's header connectors, enabling integration of additional sensors such as ultrasonic rangefinders, temperature sensors, or external communication modules. The I2C bus already serves the OLED display and magnetometer, so additional I2C devices can be daisy-chained on the same bus with unique addresses. SPI and analog pins are available for other sensor types. However, power budget is limited by the 100 mAh battery, so external modules should be low-power or require USB power supplementation for extended operation.
What is the battery runtime and how do I optimize power consumption?
The 100 mAh lithium polymer battery provides approximately 2-3 hours of continuous operation at full motor speed, or 4-6 hours with moderate motor usage and reduced OLED brightness. To optimize runtime, reduce motor PWM duty cycles when maximum speed is not required, disable the OLED display when visual feedback is not needed, and implement sleep modes during idle periods. The USB connection can power the robot indefinitely for development and testing without battery drain, making it ideal for algorithm refinement before field deployment.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
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