digital Read

Read a digital false or true from a pin.

pins.A0.digitalRead()

Digital pins read one of two values: false or true. Often the false means something connected to the pin is turned off or its status is false. In a similar way, true means something connected to the pin is on or has a status of true.

Returns

• a boolean value that is either false or true. The meaning of the value depends on how something connected to the pin decides on what value to give.

Example

See if a switch on your bread board is on or off. The switch is connected to pin D4. Write the position of the switch to the console.

let mySwitchOn = pins.D4.digitalRead();

if (mySwitchOn) {
    console.log("Switch at D4 is ON")
} else {
    console.log("Switch at D4 is OFF")
}

See also

digital write