This library provides a class for the MCP23008, it relies on the ncd-red-comm library for communication, and includes a node-red node for the MCP23008. The MCP23008 is an Integrated port expander that controls eight I/O channels through the I2C bus. Ncd.io manufactures dozens of boards, both mini-modules and full size, that utilize this chip for different applications. You can see a list here.
Installation
This library can be installed with npm with the following command:
npm install ncd-red-mcp23008
For use in node-red, use the same command, but inside of your node-red directory (usually ~./node-red).
Usage
The test.js file included in this library contains basic examples for use. All of the available configurations are available in the node-red node through the UI.
Raspberry Pi Notes
If you intend to use this on the Raspberry Pi, you must ensure that:
- I2C is enabled (there are plenty of tutorials on this that differ based on the Pi version.)
- Node, NPM, and Node-red should be updated to the LTS versions. If you skip this step the ncd-red-comm dependency may not load properly.