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28 lines
2.5 KiB
ReStructuredText
28 lines
2.5 KiB
ReStructuredText
OVERVIEW
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At the heart of this project is a customizable remote-controlled car that responds to real-time control inputs, capable of handling speed adjustments,
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directional changes, and even extended features like lights or sensors. The foundational setup uses ESP-NOW for transmitter and receiver devices,
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allowing you to wirelessly guide the car's behaviour. While the design and physical appearance of the RC car can vary wildly depending on your
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creativity and available hardware, the control system remains elegantly efficient. To facilitate wireless communication between devices, the system employs
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ESP-NOW is a lightweight and connection-free protocol ideal for fast, low-latency data transmission between ESP32 microcontrollers. Though ESP-NOW is used under
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the hood, the spotlight remains on the RC car itself: how it moves, adapts, and evolves with your ideas.
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An ESP-NOW-based remote controller sends control data wirelessly using the ESP-NOW protocol to the remote-controlled car. ESP-NOW enables fast and
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efficient communication between ESP32 devices without the need for a Wi-Fi router, network, or pairing. The provided tutorial demonstrates a functional
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setup where a transmitter sends data to a receiver to define the car's speed and direction, forming the core communication loop. While the baseline
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implementation focuses on movement, additional features like lights, sensors, or telemetry can easily be integrated by expanding the source code. This
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modular design gives users the freedom to customize both the appearance and behaviour of their RC car, resulting in endless creative possibilities.
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ABSTRACT
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--------
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To enable real-time remote operation of the RC car, the system translates joystick inputs into PWM (Pulse Width Modulation) signals that control the DC motors.
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These PWM values are stored in a predefined data structure, which is then transmitted wirelessly using ESP-NOW — a low-latency, connectionless
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communication protocol developed by Espressif. Both the transmitter and receiver modules are based on ESP32-C3 microcontrollers.
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On the transmitter side, the joystick's X and Y coordinates are continuously monitored and converted into PWM parameters. These values are packed into the
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data structure and sent via ESP-NOW to the receiver.
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The receiver module listens for incoming ESP-NOW packets, extracts the PWM control data, and applies it directly to the DC motors. This communication flow
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allows the RC car to respond instantly to user input, managing speed and direction without any physical connection between the devices. |