node-red-contrib-redplc-rpi-pcf8575 v1.0.10

node-red-contrib-redplc-rpi-pcf8575

Node-Red node for pcf8575 16bit I/O Expander.

Node Features

• 2 x 8 x Digital Inputs or Digital Outputs
• Inputs with Pullup
• Outputs are Active Low
• Eight selectable Device Addresses

Install

For using with Ladder-Logic install redPlc nodes

For using with other nodes, install module nodes

Install with Node-Red Palette Manager or npm command:

cd ~/.node-red
npm install node-red-contrib-redplc-rpi-pcf8575

Usage

This node reads/writes from/to Node-Red global variables Update is triggered by redPlc cpu node or module-update node This node works only on Raspberry Pi with Raspberry Pi OS Enable I2C with raspi-config Consult datasheet for absolute maximum ratings

Digital Input (Variable I):

Digital Output (Variable Q):

P0 = Input, P1 = Input P0 = Output, P1 = Output

P0 = Input, P1 = Output P0 = Output, P1 = Input

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