Product Introduction #
Button module is a common electronic component used to achieve key operation in electronic devices.
The Button module is composed of two electrodes and a spring-type button, which is located between the two electrodes. When the button is not pressed, the two electrodes of the button are disconnected, and the circuit is in the disconnected state; When the key is pressed, the two electrodes touch to form a closed circuit.
Application reference: keyboard, control switch, etc.
Parameter Specification #
| Parameters | Value/Description |
| Operating voltage | 3.3V~5V |
| Operating temperature | -10°C~+50°C |
| Output signal | Digital signal |
| Size | 3.16cm*2.38cm |
Wiring Diagram #
Note：Expansion board is attached to esp32 controller board.
| Button Module | ESP32 |
| VCC | 5V |
| GND | GND |
| S | Pin 32 |
Sample Code #
void setup() {
pinMode(32,INPUT);//Set pin 32 to input mode
Serial.begin(115200);//Set baud rate to 115200
}
void loop() {
Serial.println(digitalRead(32));//Read the state of pin 32 and print it to the serial monitor
delay(1000);
}
Note: If you are using an Arduino board, then change the pin in the program to PIN7, set the baud rate to 9600, and then connect the hardware pin to PIN7 and upload the program.
Test Result #
After uploading the code to the controller board, open the serial port monitor of the Arduino IDE, set the baud rate to 9600, and switch to scroll mode.
When we press the key, the serial port returns data 0; When the key is released, the serial port returns data 1.
Related Resources #
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