ESP32 smart remote control car with OLED display and supports Bluetooth 4G remote control

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Core Selling Point Label

✅ ESP32-WROOM-32UE master control, WiFi + Bluetooth dual-mode communication, supports LAN/remote network control

✅ Equipped with the same ESP32 dual-stick wireless remote control handle, low-latency control

✅ 0.96-inch OLED real-time display, distance/speed/device data visualization

✅ SG90 steering gear rotating gimbal, equipped with HC-SR04 ultrasonic ranging and obstacle avoidance

✅ Widened rubber track chassis, strong ability to climb and overcome obstacles on complex roads

✅ Onboard WS2812 ambient light, charging management, DC motor driver, integrated motherboard

✅ Completely open source code, Arduino environment, suitable for entry into microcontrollers, college training, and competition development

Full set of real-shot introduction to the product

1. The overall structure of the crawler trolley

Powered walking system

• The widened anti-skid rubber tracks + large-size drive wheels have strong friction and can drive smoothly on carpets, wooden boards, and uneven desktops. It supports forward, reverse, left and right differential steering, and in-situ drift. The mainboard integrates a high-power motor driver chip, eliminating the need for an external drive board. The output torque is sufficient, and there is no lag or loss of steps.

Core controller: ESP32-WROOM-32UE

• Onboard WiFi + Bluetooth dual-mode wireless module, external high-gain glue stick antenna, stable signal transmission; Type-C high-speed power supply/program download interface, compatible with two mainstream programming environments, Arduino and MicroPython, all reserved pads for expansion IO, and cameras, sensors, and 4G modules can be freely installed.

Visual OLED display module

• The front of the car is equipped with a 0.96-inch I2C high-definition OLED screen, which refreshes ultrasonic ranging values, equipment communication status, driving speed, and online signal quality in real time. Operating data can be viewed intuitively without a serial monitor, and the debugging and demonstration effects are intuitive.

Rotating servo gimbal + ultrasonic obstacle avoidance module

• SG90 micro servo servo 360° adjustable angle gimbal, equipped with HC-SR04 ultrasonic sensor; the gimbal can be programmed to rotate left and right to scan for obstacles, and automatically measures distance to achieve intelligent obstacle avoidance, tracking, and anti-collision warning. The detection range is 2cm~400cm, and the data is transmitted back to the OLED screen in real time.

Integrated integrated motherboard (no need for Dupont wiring)

• Dual DC motor drive circuit
• TP4056 charging management chip, built-in battery compartment, supports lithium battery charging
• WS2812 programmable RGB ambient light, can be used for lighting special effects and status prompts
• SG90 steering gear dedicated power supply interface
• OLED screen standard I2C interface
• Ultrasonic sensor plug-in terminal
• Multiple expansion GPIO pins are reserved for external infrared, tracking, temperature and humidity, and 4G modules.

Ambient lighting system

• There are on-board programmable RGB lights on both sides of the car body. Effects such as running water lights, breathing lights, warning flashing, etc. can be customized through code. The visual effect is better for competition displays and classroom demonstrations.

2. Equipped with ESP32 wireless remote control handle

The handle is also equipped with an ESP32 master control, which communicates with the car one by one, and has a complete control layout:

• Dual large-sized joysticks: the left joystick controls forward and backward straight movement, and the right joystick controls left and right steering. The control feels smooth and without lag;
• 4-way independent key switch: custom function keys that can be bound to light switches, gimbal rotation, automatic obstacle avoidance mode start and stop, and speed gear switching;
• 2-way adjustable potentiometer: can be used as a stepless speed adjustment knob to accurately control the car's driving speed;
• The same 0.96-inch OLED display: real-time display of the communication distance between the two vehicles, signal strength, and ranging data returned by the car;
• Built-in rechargeable lithium battery, Type-C charging, long-lasting wireless battery life, and Bluetooth long-distance control without delay.

Detailed explanation of core functional highlights divided into modules

Highlight 1: Dual communication mode, local/remote dual control

• The handle is paired with the car via Bluetooth for stable control within 10 meters indoors. It can be used without a router and is suitable for classroom teaching and desktop debugging;
• ESP32 comes with WiFi that can be connected to the router, and can be remotely controlled by computer/mobile web pages and small programs; the motherboard has a reserved 4G module expansion interface, which after installation can realize cross-network remote control, long-distance monitoring, and car image transmission expansion.

Highlight 2: Manual remote control + automatic intelligent dual mode

• Manual remote control mode: real-time control of the joystick, manual rotation of the gimbal to scan for obstacles;
• Automatic intelligent mode: Turn on the ultrasonic obstacle avoidance program with one click. The car automatically recognizes obstacles ahead and steers around autonomously. It supports customizing obstacle avoidance thresholds and driving speeds; it can secondary develop intelligent algorithms such as tracking, line patrol, following, and automatic parking.

Highlight 3: Fully visual OLED data interaction

Both ends of the trolley and handle are equipped with display screens for two-way data exchange:

• Car terminal: real-time display of obstacle distance, motor speed, battery power, WiFi and Bluetooth signals;
• Handle end: synchronously receives the sensing data returned by the car without connecting to the computer serial port, making offline debugging and on-site demonstration more convenient.

Highlight 4: Integrated wiring-free design, zero threshold for novices

• The split-type kits on the market require a large amount of DuPont wire wiring, which is prone to poor contact and wiring errors; this product has an integrated PCB motherboard, and all sensors, motors, and screens are plug-in terminals, plug and play, reducing wiring failures, and even students with no basic knowledge can quickly assemble and burn codes.

Highlight 5: Crawler chassis with strong passability and wide scene adaptability

Advantages of rubber anti-skid tracks compared to ordinary wheeled trolleys:

• Desktops, carpets, and building blocks can all drive smoothly on uneven surfaces;
• Small steps and gaps have basic obstacle surmounting capabilities;
• Differential speed steering, flexible U-turn on the spot, and free movement in small indoor spaces.