ESP32 - Touch Sensor - Servo Motor

This tutorial instructs you how to use ESP32 to . In detail:

That process is repeated.

Hardware Used In This Tutorial

1×ESP-WROOM-32 Dev Module
1×Micro USB Cable
1×Touch Sensor
1×Servo Motor
n×Jumper Wires
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Introduction to Servo Motor and Touch Sensor

We have specific tutorials about servo motor and touch sensor. Each tutorial contains detailed information and step-by-step instructions about hardware pinout, working principle, wiring connection to ESP32, ESP32 code... Learn more about them at the following links:

Wiring Diagram

wiring diagram between esp32 touch sensor servo motor

This image is created using Fritzing. Click to enlarge image

ESP32 Code - Touch Sensor Controls Servo Motor

/* * This ESP32 code is created by esp32io.com * * This ESP32 code is released in the public domain * * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-touch-sensor-servo-motor */ #include <Servo.h> #define TOUCH_SENSOR_PIN 18 // ESP32 pin GIOP18 connected to touch sensor's pin #define SERVO_PIN 26 // ESP32 pin GIOP26 connected to servo motor's pin Servo servo; // create servo object to control a servo // The below are variables, which can be changed int angle = 0; // the current angle of servo motor int lastTouchState; // the previous state of touch sensor int currentTouchState; // the current state of touch sensor void setup() { Serial.begin(9600); // initialize serial pinMode(TOUCH_SENSOR_PIN, INPUT); // set ESP32 pin to input mode servo.attach(SERVO_PIN); // attaches the servo on pin 9 to the servo object servo.write(angle); currentTouchState = digitalRead(TOUCH_SENSOR_PIN); } void loop() { lastTouchState = currentTouchState; // save the last state currentTouchState = digitalRead(TOUCH_SENSOR_PIN); // read new state if(lastTouchState == LOW && currentTouchState == HIGH) { Serial.println("The sensor is touched"); // change angle of servo motor if(angle == 0) angle = 90; else if(angle == 90) angle = 0; // control servo motor arccoding to the angle servo.write(angle); } }

Quick Instructions

  • If this is the first time you use ESP32, see how to setup environment for ESP32 on Arduino IDE.
  • Do the wiring as above image.
  • Connect the ESP32 board to your PC via a micro USB cable
  • Open Arduino IDE on your PC.
  • Select the right ESP32 board (e.g. ESP32 Dev Module) and COM port.
  • Copy the above code and paste it to Arduino IDE.
  • Compile and upload code to ESP32 board by clicking Upload button on Arduino IDE
  • Touch the touch sensor several times.
  • See the change of servo motor

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