ESP32 4WD Smart Robot Car Setup Guide

This guide is for the ESP32 WiFi multifunction 4WD smart robot car kit. Build it in stages: chassis, motor direction, battery, WiFi control, then sensors. Do not debug the app before the motors and power path are stable.

Assembly order

1. Build the chassis without wheels first and check all screws.
2. Mount motors in the same orientation on each side.
3. Install the motor driver and ESP32 controller with enough space for USB access.
4. Connect only one motor side for the first direction test.
5. Add wheels after both sides rotate correctly while the car is lifted off the table.

Power and battery checks

• Use the specified 18650 battery type and correct polarity.
• Do not power motors from the ESP32 USB port.
• If the board resets when motors start, check battery voltage and motor-driver wiring.
• Keep a physical power switch reachable during first tests.

First drive test

Run a fixed low-speed forward command, then stop, reverse, left, and right. If the car spins during forward, one side is reversed. Fix wiring or firmware direction one side at a time. After direction is correct, add WiFi control and then obstacle or line sensors.

Troubleshooting

• One side does not move: swap motor outputs to separate motor failure from driver failure.
• WiFi control lags: test near the router and remove sensor polling from the first drive sketch.
• Car drifts: trim motor speed in firmware and check wheel friction.

Related products and references

ESP32 4WD Smart Robot Car Kit / Camera vision guide / Sensor dashboard guide

External reference: Arduino official documentation.