Analog Signals with BeagleBone BoneScript

Using the Beaglebone Black ADC

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As I’ve mentioned, one of the advantages of the Beaglebone Black over the Raspberry Pi is the presence of an analog-to-digital converter. There are 7 analog inputs, all at P9:

To read analog signals, we’ll be using the analogRead() function. Note that the analog pins can only read as much as 1.8 V. Levels higher than 1.8 V will damage the pins so be wary!

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The following script reads an analog signal on pin P9_40 and displays it on the Output log on the Cloud9 IDE:

var b = require('bonescript');
inputPin = "P9_40";
loop();
function loop() {
    var value = b.analogRead(inputPin);
    console.log(value);
    setTimeout(loop, 1);
};