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RC Robot Tutorial

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Alex B.
2025-07-21 02:05:36 -04:00
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HOW DOES IT WORK?
=================
The BitByteRider RC car is powered by ESP32-C3 Breadboard & Power adapter developmemt board.
The Schematic and KiCAd PCB board are available on GitHub_: https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter
The bitByteRider RC car is powered by ESP32-C3 bitBoard. The Schematic and KiCAd PCB board files are available
on GitHub_: https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter
The bitByteRider RC car operates using two main units: the *transmitter*, which reads and sends the joystick's X and Y values, and
the *receiver*, which interprets these values and converts them into PWM signals to control the DC motors. Both units communicate
via **ESP-NOW**, a low-latency, connectionless wireless protocol that requires no Wi-Fi network or pairing.
In addition to enabling real-time control, using ESP-NOW introduces to key networking concepts such as **data encapsulation** and
structured communication. By using data structures to group control variables, you gain hands-on experience with how information
is packaged and transmitted — laying the groundwork for understanding the fundamentals of network communication in embedded systems.
.. _GitHub: https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter
@@ -16,7 +24,7 @@ The GPIO numbers correspond to those on the ESP32-C3 WROOM microcontroller. The
Reading the Joystick x- and y- axis
~~~~~~~~~~~~~~~~~~~~~~
To determine the position of the Joystick, the BitRider RC car uses ADC to measure voltage on two GPIOs connected to the joystic
To determine the position of the Joystick, the BitRider RC car uses ADC to measure voltage on two GPIOs connected to the joystick
x- and y- axis potentionometers (**GPIO0** and **GPIO1**).
Controlling the Direction and Speed

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<section id="how-does-it-work">
<h1><span class="section-number">2. </span>HOW DOES IT WORK?<a class="headerlink" href="#how-does-it-work" title="Link to this heading"></a></h1>
<p>The BitByteRider RC car is powered by ESP32-C3 Breadboard &amp; Power adapter developmemt board.
The Schematic and KiCAd PCB board are available on <a class="reference external" href="https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter">GitHub</a>: <a class="reference external" href="https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter">https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter</a></p>
<p>The bitByteRider RC car is powered by ESP32-C3 bitBoard. The Schematic and KiCAd PCB board files are available
on <a class="reference external" href="https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter">GitHub</a>: <a class="reference external" href="https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter">https://github.com/alexandrebobkov/ESP32-C3_Breadboard-Adapter</a></p>
<p>The bitByteRider RC car operates using two main units: the <em>transmitter</em>, which reads and sends the joystick’s X and Y values, and
the <em>receiver</em>, which interprets these values and converts them into PWM signals to control the DC motors. Both units communicate
via <strong>ESP-NOW</strong>, a low-latency, connectionless wireless protocol that requires no Wi-Fi network or pairing.</p>
<p>In addition to enabling real-time control, using ESP-NOW introduces to key networking concepts such as <strong>data encapsulation</strong> and
structured communication. By using data structures to group control variables, you gain hands-on experience with how information
is packaged and transmitted — laying the groundwork for understanding the fundamentals of network communication in embedded systems.</p>
<section id="reserved-pins-gpios">
<h2><span class="section-number">2.1. </span>Reserved Pins &amp; GPIOs<a class="headerlink" href="#reserved-pins-gpios" title="Link to this heading"></a></h2>
<p>The following table summarizes GPIOs and pins reserved for operations purposes.</p>
<p>The GPIO numbers correspond to those on the ESP32-C3 WROOM microcontroller. The Pin number corresponds to the pin on the Breadboard and Power adapter development board.</p>
<section id="reading-the-joystick-x-and-y-axis">
<h3><span class="section-number">2.1.1. </span>Reading the Joystick x- and y- axis<a class="headerlink" href="#reading-the-joystick-x-and-y-axis" title="Link to this heading"></a></h3>
<p>To determine the position of the Joystick, the BitRider RC car uses ADC to measure voltage on two GPIOs connected to the joystic
<p>To determine the position of the Joystick, the BitRider RC car uses ADC to measure voltage on two GPIOs connected to the joystick
x- and y- axis potentionometers (<strong>GPIO0</strong> and <strong>GPIO1</strong>).</p>
</section>
<section id="controlling-the-direction-and-speed">

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