array-gpio

array-gpio is a low-level javascript library for Raspberry Pi using direct register access.

It maps the ARM peripheral registers in memory using /dev/mem for PWM, I2C, SPI and /dev/gpiomem for GPIO control.

One of its features is the use of array objects for GPIO input/output control.

ARM Peripheral Support

• GPIO
• PWM
• I2C
• SPI

GPIO pin numbers

All pin numbering used on this module are based on the RPI's board pinout diagram numbers 1~40.

Table of contents

1. Supported Raspberry Pi Devices
2. Node.js version requirement
3. Supported OS
4. Installation
5. Quick Tour
   • Creating a GPIO input and output object
   • Monitoring the state of a GPIO input object
   • Using isOn and isOff to get the current state of a GPIO input/output object
   • Monitoring multiple GPIO input objects
   • Turning on and off a GPIO output with a delay
   • Create a GPIO input/output array object
   • Create a GPIO output pulse
6. API
   • GPIO
     • Input
     • Output
   • PWM
   • I2C
   • SPI

Supported Raspberry Pi Devices

• Model: Pi Zero & Zero W, Pi 3 Model B+, Pi 4, Compute Module 3 & 4 (Generally most of the 40-pin models)

Supported OS

• Raspberry Pi OS (32 and 64-bit)
• Raspbian
• 64-bit Ubuntu 20+ (Only GPIO peripheral is supported)

Nodejs Requirements

• Node.js version: 10.x, 12.x, 14.x, 16.x, 18.x (Ideally, the latest LTS version)

Installation

$ npm install array-gpio