This repo is outdated, please check the nodeGPIOdemo repositories from my github to get up-to-date codes!
Demo 1 - Control GPIO using Node.js
Demo 2 - Control one GPIO via web using Node.js
Demo 3 - Control multiple GPIO via a friendly web UI, using Node.js
Using Node.js and the Express framework to Access the Toradex Colibri VF61 GPIO via web
This directory contains the code files needed to run the demo described step-by-step in the article "Using Node.js and the Express framework to Access the Colibri VF61 GPIO via web".
The server-side application is built using Node.js to access the board GPIOs, via filesystem operations, and the Express framework to run a webserver which handles incoming POST requests by the client-side application, changing GPIO states and answering to the client as needed.
The client-side application has two styling approaches: near-zero CSS, focusing on the functionality rather than style; and using the Bootstrap framework - providing a quick example on how to build a simple yet welcoming user-interface. Regarding the functionality, Javascript jQuery, along with AJAX, is used to create a responsive experience.
To run this application some node modules need to be installed:
Express framework: npm install express # install the Express framework to build a webserver
Body-parser middleware for Express: npm install body-parser # install this Node.js middleware to parse JSON body for the Express framework
After installing the dependencies you can run the application using Node. Then just access http://192.168.0.180:3000/ (default values - modify the server codes for other values) to get to the menu. Notice that only the corresponding links will work properly, when you chose one of the node applications below.
- node server-onebtn.js
- node server-multibtn.js
- node server-switches.js
To help the development of node applications, there are some modules that can be useful
Nodemon: npm install -g nodemon # restart the app whenever a file within the project changes
Debug (already installed with Express): npm install debug # anyway if you need it for other projects