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Lesson 34: TT Motor

In this lesson, you’ll learn how to control a motor with the ESP32 Development Board and an L9110 motor control board. We’ll cover defining and initializing motor pins, setting them as outputs, and adjusting the motor’s speed using the analogWrite function. This project is ideal for those seeking to grasp motor control and pulse-width modulation (PWM) on the ESP32 platform, providing a hands-on demonstration of output operations in a microcontroller environment.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
Universal Maker Sensor Kit	94	Universal Maker Sensor Kit

You can also buy them separately from the links below.

Component Introduction	Purchase Link
ESP32 & Development Board (ESP32 Board)	BUY
TT Motor	-
L9110 Motor Driver Module	-
Breadboard	BUY

Wiring

Code

Code Analysis

The first part of the code defines the motor control pins. These are connected to the L9110 motor control board.
```
// Define the motor pins
const int motorB_1A = 26;
const int motorB_2A = 25;
```
The setup() function initializes the motor control pins as output using the pinMode() function. Then it uses analogWrite() to set the speed of the motor. The value passed to analogWrite() can range from 0 (off) to 255 (full speed). A delay() function is then used to pause the code for 5000 milliseconds (or 5 seconds), after which the motor speed is set to 0 (off).
```
void setup() {
  pinMode(motorB_1A, OUTPUT);  // set motor pin 1 as output
  pinMode(motorB_2A, OUTPUT);  // set motor pin 2 as output

  analogWrite(motorB_1A, 255);  // set motor speed (0-255)
  analogWrite(motorB_2A, 0);

  delay(5000);

  analogWrite(motorB_1A, 0);
  analogWrite(motorB_2A, 0);
}
```