Continuing the discussion from Arduino i2c Firmata : Is there any way to connect Arduino NANO boards to handle I/O + Analog (+ I2C ?) through NodeRed? Important: NANO has ONLY a USB port! ... so most of the MQTT libraries based on Wi-Fi chips will not work. Has anyone done this before? I'm not l…

PizzaProgram 11 December 2020 13:58 3

YES, this is exactly the thing I'm looking for!

with minimal C, only "forwarding" RAW data from/to all ports and reconnecting if connection lost.
doing whatever possible at NodeRed side.

My question is:

HOW to do that?

Currently I'm investigating this:

And This:

Arduino USB > Firmata > I2C > [GPIO PCF8574 + MCP23017 + temp BMP280]

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MQTT with Arduino Nano + NodeRed

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