GPIO

The gpio module supports GPIO pin abstraction. Use require('gpio') to access this module.
Class: GPIO
An instances of GPIO represents a GPIO pin.
new GPIO(pin[, mode])
pin <number> The pin number which can support GPIO function.
mode <number> The pin mode INPUT (0) or OUTPUT (1). Default: INPUT
Instances of the GPIO class can be created using the new keyword or by calling gpio.GPIO() as a function.
// Javascript example: Create the GPIO instance 
var GPIO = require('gpio').GPIO;
var pin = new GPIO(0, OUTPUT);
​
// or, shortly
var pin = board.gpio(0, OUTPUT);
gpio.read()
Returns: <number> The return value is HIGH (1) or LOW (0)
Read the value from the GPIO pin.
// Javascript example: Read value from the pin 0.
var pin = board.gpio(0, INPUT);
var value = pin.read();
gpio.write(value)
value <number> The value could be HIGH (1) or LOW (0).
Writes a value to the GPIO pin.
// Javascript example: Write HIGH to the pin 0.
var pin = board.gpio(0, OUTPUT);
pin.write(HIGH);
gpio.toggle()
Toggles the output value of the GPIO pin.
// Javascript example: Write LOW to the pin 0 and toggling it.
var pin = board.gpio(0, OUTPUT);
pin.write(LOW); // Set to LOW
pin.toggle(); // HIGH
pin.toggle(); // LOW
gpio.low()
Set the GPIO pin to LOW.
var pin = board.gpio(0, OUTPUT);
pin.low();
gpio.high()
Set the GPIO pin to HIGH.
var pin = board.gpio(0, OUTPUT);
pin.high();
gpio.pin
<number>
Pin number of the GPIO object.
// Javascript example: Write LOW to the pin 0 and print the pin number.
var gpio0 = board.gpio(0, OUTPUT);
console.log(gpio0.pin) // Print pin number 0.
gpio.mode
<number>
Current mode of the GPIO pin. The value is INPUT (0) or OUTPUT (1).
// Javascript example: Write LOW to the pin 0 and print the mode.
var gpio0 = board.gpio(0, OUTPUT);
console.log(gpio0.mode) // Print pin number 0.
API Reference - Previous
Global
Next - API Reference
Graphics
Last updated 10 months ago