@rakwireless/mcp-pcf-aio 1.0.0
Node-RED node for MCP23017 GPIO expander chips
@rakwireless/mcp-pcf-aio
A Node-Red node for 16-Bit I/O Expander MCP23017 chip and 8-Bit I/O Expander PCF8574 chip.
Install from Node-RED
From within NodeRED, visit the top right menu, select Manage palette and then the Install tab. Look for @rakwireless/mcp-pcf-aio and install it.
Manual installation (development)
@rakwireless/mcp-pcf-aio will be published to the Node-RED Library by RAKwireless, then you can run the following command in the root directory of your node-red install:
npm install @rakwireless/mcp-pcf-aio
Usage
NOTE: Please make sure that Node-RED user has the permissions to access I2C devices if you deploy Node-red with docker.
There is a global (hidden) MCP-PCF-chip node you can set, with following options:
I2C bus Number: the I2C bus number for the IO expander chip
Address A2-A1-A0: the IO expander chip and the i2c bus address
Interval: is used to determine how frequently all inputs are polled
Reset Pin: GPIO number of reset pin, only used for reset MCP23017 chip
Start All Outputs High: Some relay boards turn OFF if sending HIGH signal from the chip. To prevent accidentally turn ON all the realays on startup, use this checkbox.
NOTE: The original version of mcp-pcf-aio is published by László Szakmári and we made some changes based on it to set RESET pin for MCP23017 chip.
Example
mcp-pcf-aio-examle.json - The example shows how to Control LED using RAK14003 WisBlock LED Bar Graph Module.
License
This project is licensed under MIT license.
