Control LED or AC bulb using ESP32 Built-in Touch pins

Control LED or AC bulb using ESP32 Builtin Touch

This this video how to use Capacitiv touch features of ESP32 WiFi, Bluetooth Microcontroller baord.

00:40 Introduction
03:02 Wiring Explained
06:25 Code Explained
09:26 LED turned ON/OFF with Touch
11:28 AC Bulb turned ON/OFF

Arduino Code


 /*
 * ESP32 Touch usage to control AC bulb or LED
 * 
 * Written by Ahmad Shamshiri at 17:27
 * in Ajax, Ontario, Canada. 
 * www.Robojax.com
 * Watch video instruction for this:
 * https://youtu.be/S45upZ836vA
 * 
 * 10 touch pins. The pins are GPIO pins.
 * T0 is pin 4
 * T1 is pin 0
 * T2 is pin 2
 * T3 is pin 15
 * T4 is pin 13
 * T5 is pin 12
 * T6 is pin 14
 * T7 is pin 27
 * T8 is pin 32
 * T9 is pin 33
/*
 * 
 * 
 * www.Robojax.com 
 * 
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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
const int touchPin = T0;
const int relayPin = 23;
const int sensitivity = 50;// watch video for details
void setup()
{
  pinMode(relayPin, OUTPUT);
  Serial.begin(115200);
  delay(1000); // give me time to bring up serial monitor
  Serial.println("Robojax");
  Serial.println("ESP32 Touch Test"); 
  Serial.println(1);
  delay(1000);
  Serial.println(2);
  delay(1000); 
  Serial.println(3);
  delay(1000);
  Serial.println("Touch the touch pin");       
}

void loop()
{
  int touchValue =touchRead(touchPin);// get value using T6
  Serial.print("Value:");   
  Serial.println(touchValue); 
  if(touchValue <= sensitivity)
  {
  Serial.print("Touched:");
   digitalWrite(relayPin, HIGH);// turn ON Relay   

  }else{
   digitalWrite(relayPin, LOW);// turn ON OFF      
  }
  delay(300);
}