See LICENSE.md for license terms and conditions.
This sample application is distributed as part of the Intel® XDK. It can also be downloaded or cloned directly from its git repo on the public Intel XDK GitHub* site.
For help getting started developing applications with the Intel XDK, please start with the Intel XDK documentation.
See also, the mraa library documentation for details regarding supported boards and the mraa library API and the upm library documentation for information regarding the upm sensor and actuator library APIs.
A simple Node.js application that reads an onboard digital input (a GPIO input), on select Intel IoT development boards, and displays the result of that read on the console log.
The app initializes a single pin to digital input mode, so it can be read;
samples that digital input at a regular basis; and prints the result of each
read to the console. The specific pin that is read is configured in
cfg-app-platform.js and can be identified by looking for lines similar to the
following line of code, in the cfg.init method:
io = opt.altPin ? io : 7 ; // use alternate pin?
In the example shown above, digital "pin 7" will be used for the digital input.
IMPORTANT: the pin that is configured by the sample is a function of the detected board. You must inspect the code to determine which pin is being configured for use on your board!!
If you are using a NUC (aka "gateway") with an attached Arduino 101 board (aka
"firmata" configuration), the I/O pin is identified by adding 512 to the
respective I/O pin number, as it would be identified on the Arduino 101
device. See the comments in the cfg-app-platform.js module for details.
Once you have identified the GPIO pin that is being read, you can use a jumper wire to change the input value of that digital input to a one or zero, by connecting one end of the jumper wire to the initialized digital input and the other end of the jumper to a +3.3V or GND point on your board's header.
Most boards have many pins that can be configured for use as a digital input.
The cfg-app-platform.js module has been designed so you can override the pin
that is used, by passing it an alternate pin during the init call (see the module
documentation). Or, you can simply modify the code to change the default value.
- main.js
- package.json
- README.md
- LICENSE.md
- <project-name>.xdk
- Intel® Galileo Board for Arduino
- Intel® Edison Board for Arduino
- Intel® Joule™ 570x Developer Kit
- Intel® NUC DE3815 + Arduino 101
- Intel® NUC5i7RYH + Arduino 101
See the Intel® NUC support page and the Intel Product Specifications search tool for detailed hardware specifications and support.
This sample can run on other IoT Node.js development
platforms, but they must include the appropriate sensor hardware or have an
attached Arduino 101 board and utilize the imraa service. If you use an IoT
device that is not listed above you may have to make changes to the I/O
initialization and configuration code in the cfg-app-platform.js module
before it will work on those other platforms. See this
device software prerequisites page for help configuring the software on
your IoT device so it can be used with the Intel XDK.