node-red-contrib-redplc-tf-bpi23017
Node-Red CSA Controller node by using mcp23017 16bit I/O Expander.
This module is modified from node-red-contrib-rpi-mcp23017
Node Features
- 2 x 8 x Digital Inputs or Digital Outputs
- Add Pullup Resistor to Digital Inputs
- Eight selectable Device Addresses
Install
Install with Node-Red Palette Manager or npm command:
cd ~/.node-red
npm install node-red-contrib-redplc-tf-bpi23017
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):
PA = Input, PB = Input
PA = Output, PB = Output
| Pin | Bit | Pin | Bit |
|---|---|---|---|
| PA0 | 0 | PB0 | 8 |
| PA1 | 1 | PB1 | 9 |
| PA2 | 2 | PB2 | 10 |
| PA3 | 3 | PB3 | 11 |
| PA4 | 4 | PB4 | 12 |
| PA5 | 5 | PB5 | 13 |
| PA6 | 6 | PB6 | 14 |
| PA7 | 7 | PB7 | 15 |
PA = Input, PB = Output
PA = Output, PB = Input
| Pin | Bit | Pin | Bit |
|---|---|---|---|
| PA0 | 0 | PB0 | 0 |
| PA1 | 1 | PB1 | 1 |
| PA2 | 2 | PB2 | 2 |
| PA3 | 3 | PB3 | 3 |
| PA4 | 4 | PB4 | 4 |
| PA5 | 5 | PB5 | 5 |
| PA6 | 6 | PB6 | 6 |
| PA7 | 7 | PB7 | 7 |
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