How to read an analogue voltage with an 8266 in ESPHome

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1

Hi,

Experimenting with ESPHome and a NODEMCU I have a project where I need to pass data from an arduino-UNO to an 8266 for reception in Home Assistant (HASS IO). What is the best way to do this?

  1. I thought about outputting a corrosponding voltage on one of the Arduino’s D-A ports and then reading it back on a A-D port on the 8266 (A0) but couldn’t find a component to read an analogue level…? Surely there is one?

  2. The other option was to pass it digitally to the 8266, would I2c be easiest?

Thanks.

2

A-D sensor:

What sort of data are you sending?

Why not just publish data from the UNO via mqtt?

3

That would be easiest but my Arduino is doing lots of constant comm’s over RF with other devices so the serial port is constantly in use. That’s why I was thinking to run code in the 8266 to handle the WiFi comm’s as it does this nicely.

This is a transitional solution, I will eventually replace all my RF devices with 8266’s using WiFi Which will be much simpler.

Thanks for the link

4

Mqtt uses the network connection not the serial port. Or don’t you have wired network available?

5

No wired network…
Thats why I need an 8266 but cant communicate with it.