How does HA run Actions in an automation?

So that take care of that. Just a quick read so far it appears that ESPHome is easy to setup. Not having the HE in the middle sounds like a good thing

ESPHome is very easy to use, and if your device has a bluetooth chip - you can now add bluetooth proxy to it, and start receiving bluetooth data.

Hmm No bluetooth, I only have an ethernet shield

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Just a heads up - ESPHome only works with ESP8266 and ESP32 microcontrollers, IIRC. Your Arduino MEGA 2560 would need to be replaced with one or more ESP-based micrcontrollers.

Ha there’s the catch! I was waiting for it :)) Thanks ogiewon ! Good seeing you over here

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So the ESP8266 has two GPIO pins. That means that I would need a single 8266 for every two relays that I want to switch. I could have any nuber of DS type temp sensors tho.

Most users choose something like an ESP8266 NodeMCU microcontroller, or an ESP32 NodeMCU microcontroller. Personally, at this point in time, I would recommend using ESP32 based solutions, as they have a lot more usable GPIO pins than the ESP8266-based solutions.

It sounds like you are looking at ESP01 solutions, which are extremely GPIO limited versions of the ESP8266. They are small, still have onboard WiFi, and are inexpensive… But I personally would not use them when where many GPIO pins are required.

Also, please be aware that many of the ESP8266-12 NodeMCU (or Wemos D1 Mini) GPIO pins come with some pretty significant limitations. Not all Digital GPIO pins are created equally, as some have special purposes during power-up, which make them not very useful for normal home automation tasks. Since the ESP32-based solutions typically offer many more ā€˜problem-free’ GPIO pins, I recommend that platform over the ESP8266 these days.

something like this?

I would personally go with something like this (which is ESP32 based)

Ordering one today, stay tuned :)) Thanks for the assist.

@edlentz - just to fully disclose… I still use my HubDuino on Hubitat for all of my microcontrollers. I just am tinkering with Home Assistant at this time, and have played around with ESPHome. ESPHome is pretty amazing. However, I am no expert in using it.

Hey I get it. I am amazed at all that HA is and can do compared to HE. HE has worked well for me for quite some time. For what I want to do I think ESPhome will work better than. Hubduino >> Hubitat >> Home Assistant. Simplifying things. My wife now says I can’t check out since no one else knows what I am doing around here LOL

Something I just thought of. Currently I have several relays that the Arduino controls direct from the gpio pin. Any gotchas with the esp ?