4-bit Button Touch Proximity Sensor Features
This module has 4 fingerprint touch inputs and 4 digital output pins. It also has 5 LEDs. One for power supply and 4 LEDs indicate fingerprint sensors. If you touch each sensor, the output becomes HIGH and the LED turns on. If you don’t touch, the output will be LOW and the LED turns off.
This module can be used on glass, ceramic, plastic and other surfaces.
4-bit Button Touch Proximity Sensor Pinout
This module has 6 pins:
- VCC: Module power supply – 2-5.5 V
- GND: Ground
- OUT1: Digital output 1
- OUT2: Digital output 2
- OUT3: Digital output 3
- OUT4: Digital output 4
You can see the pinout of this module here.
Required Materials
Hardware Components
Software Apps
Interfacing 4-bit Button Touch Proximity Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to this sensor. Connect wires accordingly.
Step 2: Code
Upload the following code to your Arduino.
/*
CJMCU-0401-4bit-Touch-ُSensor-Module
made on 08 Nov 2020
by Amir Mohammad Shojaee @ Electropeak
Home
*/
#define out1 8
#define out2 9
#define out3 10
#define out4 11
void setup()
{
Serial.begin(9600);
Serial.println("begin to touch");
pinMode(out1,INPUT);
pinMode(out2,INPUT);
pinMode(out3,INPUT);
pinMode(out4,INPUT);
}
void loop()
{
if(digitalRead(out1)==HIGH){
Serial.println("button1 is touched");
while(digitalRead(out1)==HIGH){}
}
if(digitalRead(out2)==HIGH){
Serial.println("button2 is touched");
while(digitalRead(out2)==HIGH){}
}
if(digitalRead(out3)==HIGH){
Serial.println("button3 is touched");
while(digitalRead(out3)==HIGH){}
}
if(digitalRead(out4)==HIGH){
Serial.println("button4 is touched");
while(digitalRead(out4)==HIGH){}
}
}
By touching each fingerprint sensor, its digital output becomes HIGH and the phrase “button is touched” appears in the Serial Monitor.
The output is as follows. We accidentally touched 4 sensors.
