NodeRED - Node to read current from a Control Everything MCP3428 Analog to Digital Conversion 0-20v board connected via I2C.
Board is available at : https://www.controleverything.com
Install for NodeRED with NPM : npm install node-red-i2c-mcp3428
This has been written for the Raspberry Pi 3 Model B. To enable i2c on your Raspberry Pi see the tutorial at : https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial
Once enabled, confirm the MCP3428 board is visible with cli command : i2cdetect -y 1
The default connection port is 0x68 (104).
wire.on('data', function(data){ data is an object }
// channels channel 1 = 0x10 channel 2 = 0x30 channel 3 = 0x50 channel 4 = 0x70
length = 2
wire.stream(channel, length, ms-delay);