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32 lines
2.7 KiB
ReStructuredText
32 lines
2.7 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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At the core of this project lies a shared data structure that encapsulates the control parameters for the DC motors, specifically their rotation speeds,
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which are modulated using Pulse Width Modulation (PWM). This structure ensures consistent interpretation of control signals between the transmitter
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and receiver.
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The system employs ESP-NOW, a low-latency, connectionless communication protocol developed by Espressif, to facilitate wireless data exchange between
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the transmitter and receiver modules. Both devices are based on ESP32 microcontrollers and maintain a synchronized understanding of the data structure
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to ensure seamless communication.
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On the transmitter side, joystick input is continuously read and translated into control values. These values are then encapsulated into the
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predefined data structure and transmitted via ESP-NOW to the receiver.
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The receiver module listens for incoming ESP-NOW packets, de-encapsulates the joystick data, and converts the received values into PWM signals.
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These signals are then used to control the speed and direction of the DC motors, enabling real-time remote operation of the vehicle. |