Gpio I Business

Apr 11, 2014 - This guide will require a careful eye to catch any mistakes, and a bit of courage, especially if you are new to the GPIO connectors. I would like to. Provides access to GPIO on the Raspberry Pi from Node.js - nebrius/raspi-gpio.

Following is a handy reference that you can use to control and access your BeagleBone’s general purpose input/output (GPIOs) with the file system, BoneScript, and Python.

Controlling the GPIO with the file system

You can use the following commands to control the GPIO with the file system.

  • Exporting a pin:

  • Setting a pin OUTPUT:

  • Writing a pin HIGH:

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  • Writing a pin LOW:

  • Setting a pin INPUT:

  • Reading the value from an INPUT pin (returns 1 for HIGH and 0 for LOW):

Controlling the GPIO with BoneScript

You can use the following BoneScript commands to control the GPIO.

  • Loading a BoneScript module:

  • Setting a pin OUTPUT:

  • Writing a pin HIGH:

  • Writing a pin LOW:

  • Setting a pin INPUT:

  • Reading the value from a digital INPUT pin (returns HIGH or LOW):

  • Setting a pin for pulse-width modulation (PWM) with 50 percent duty cycle:

  • Reading the value from an analog INPUT pin (returns a value between 0 and 1):

Controlling the GPIO with Python

You can use the following Python commands to control the GPIO.

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  • Importing Adafruit’s BeagleBone Input Output Library:

  • Setting a pin OUTPUT:

  • Writing a pin HIGH:

  • Writing a pin LOW:

  • Setting a pin INPUT:

  • Reading the value from a digital INPUT pin (returns HIGH or LOW):

  • Setting a pin for PWM with 50 percent duty cycle:

  • Setting an analog INPUT:

  • Reading the value from an analog INPUT pin (returns a value between 0 and 1):