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@rakwireless/mcp-pcf-aio

v1.0.0

Published

Node-RED node for MCP23017 GPIO expander chips

Downloads

42

Vulnerabilities

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Links

Git

Maintainers

xoseperez_rakxoseperez_rak

Keywords

node-redrakwirelessi2cioinputoutputaiomcp23017pcf8574

Readme

@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.