Overview — Named after the Greek god of war, ARIS is a 10×10 cm, under-500-gram mini sumo robot built to spot its rival, maneuver, and strike. The brains behind it? An EBYTE-sponsored ESP32-C3-MINI-1. This collaboration between Chengdu EBYTE and the University of Peloponnese Robotics Team (UoP Robotics) is a vivid example of how STEM education and competitive robotics reinforce each other.

Background: A Two-Way Partnership for UGV & STEM Robots

In August 2025, Chengdu EBYTE Electronic Technology Co., Ltd. signed a sponsorship agreement with the University of Peloponnese Robotics Team (UoP Robotics Team) to support "UGV and Educational STEM Robots Development." EBYTE supplied a range of core hardware spanning ESP32-C6, ESP32-C3, and LoRa communication modules. Among them, the E101-C3MN4-PS-TB (ESP32-C3 development board) — valued for its cost-effectiveness and compact size — became the cornerstone of this project, which runs on moderate compute requirements.

The Project: A Competitive Mini Sumo Robot in the Name of the God of War

As the flagship outcome of Project ARIS (named after Ares, the Greek god of war), the team designed and built a highly competitive mini sumo robot:

• Standard spec: 10×10 cm footprint, max weight 0.5 kg — fully compliant with international mini sumo competition rules;

• Core mission: inside the circular arena (the dohyo), detect, confront, and push the opponent out of the ring while staying in bounds itself;

• Systems engineering: a blend of disciplines — infrared sensors for precise opponent and edge detection, fast and reliable decision-making algorithms, and efficient motor control delivering the right torque and speed during a fight.

Beyond competition, the mini sumo robot serves a serious educational purpose: it helps enthusiasts and students sharpen their programming skills and build knowledge across electronics, signals & systems, wireless communication, mechanics, and power management — learning to think, cooperate, and solve problems with their hands.

Under the Hood: Why the ESP32-C3-MINI-1 Is the Robot's "Brain"

In the system, EBYTE's ESP32-C3-MINI-1 acts as the robot's "brain." The team chose it for its rare balance of processing power, connectivity, and energy efficiency — and for its tiny footprint, which suits the constrained dimensions of a mini sumo robot.

• Strong wireless: built-in Wi-Fi 6 and Bluetooth 5 enable robust wireless communication for system monitoring, configuration, and diagnostics, removing the need for extra Bluetooth LE hardware;

• Flexible I/O: rich GPIO supporting I2C, UART, Tx/Rx, and I2S, plus on-chip ADC and PWM, covering sensor integration and motor control;

• Ample storage: on-chip SRAM for real-time tasks during matches and testing, and up to 4MB of integrated flash for firmware, control logic, and communication routines — no external memory dependency.

Three features proved especially critical in practice:

Tx/Rx start/stop interface — in sumo competition, the referee must remotely start and stop the robot. Dedicated Tx/Rx serial lines provide clean, low-latency data exchange, letting a start/stop module integrate seamlessly for safe, precise control at the beginning and end of each match.

ADC analog-to-digital conversion — the sensors used to detect opponents and arena edges are mostly analog (infrared distance sensors, line-detection sensors, battery-monitoring circuits), outputting continuously varying voltages. The ESP32-C3-MINI-1's ADCs translate these voltages into precise digital values, letting the control software reliably interpret how close the opponent is, whether the robot is near the ring edge, or whether battery voltage is dropping — and adjust movement and motor power dynamically.

PWM motor control — by adjusting the duty cycle of PWM signals, the microcontroller finely regulates motor speed, acceleration, and turning, letting the robot maneuver aggressively and accurately during a match.

Real-World Testing: Verified from Sensor to Decision

To validate opponent detection, the team equipped the robot with four digital sensors, each returning a high or low value, read in real time to determine which sensors see the opponent and drive match decisions.

In testing, a hand was moved toward and away from the sensor array at varying distances (up to about 15 cm) to observe each sensor's response and confirm its detection range and consistency. The team then watched all four digital signal waveforms live via the Arduino IDE Serial Plotter. The results matched expectations exactly — no significant noise, no false triggers — confirming the sensors performed accurately and were fit for the robot's live match behavior.

Team Feedback: A Front-Line Developer's Endorsement

In the article's acknowledgements, the UoP Robotics Team thanked EBYTE sincerely:

"We want to express our sincere gratitude to EBYTE for generously providing us with ESP32-C3-MINI-1 modules, which have played a vital role in the development and implementation of our projects. Their support has allowed us to work with high-quality, reliable hardware that significantly enhances both the performance and capabilities of our design… Their contribution has not only strengthened our work but has also inspired us to continue exploring new possibilities in robotics, the IoT, and embedded systems."

Project ARIS stands as a clear example of how the ESP32-C3-MINI-1 encouraged the team to push ideas further and achieve its goals.

Looking Ahead

From a single development board to a competition-ready mini sumo robot, the partnership between EBYTE and the UoP Robotics Team shows the value of academia–industry collaboration: enterprises empower students with hardware and ecosystem resources; students feed creativity and engineering back into the products; frontier embedded technology finds its way into real engineering practice.

EBYTE remains committed to supporting university teams and research institutions worldwide. As more STEM robot projects take shape, EBYTE looks forward to working with more students and educators to turn IoT and embedded technologies into visible, tangible innovation — and to advance engineering education and the smart-hardware industry together.