I need to be able to detect when my workshop door has been opened - and STAYS open. And when it SHUTS again.

The ESP32 needs to communicate with my Smart Heater Controller to turn off the heater (if it's on) or air-con (ditto) so I don't waste power trying to heat up (or cool down) the world if the door is open.

When the door closes it can then tell the Smart Heater Controller to go back doing whatever it was doing (heating, cooling) as though nothing had interrupted it.

And, of course, I need some means whereby the device tells me it's working (or has gone wrong).

So a low current ESP32 seems the way forward. Am I on the right track?

► thingPulse low power Deep Sleep ESP32 WROVER module
https://thingpulse.com/product/epulse-feather-low-power-esp32-development-board/

AliExpress Si4599 BoB (Breakout Board, for breadboard use), less than $1 each 😮)
https://s.click.aliexpress.com/e/_DCSo3MN

Cheaper alternative AO4606, 10 pieces for £1.36 + shipping
https://s.click.aliexpress.com/e/_DnCEIid

Oregon Embedded Battery Life Calculator
http://oregonembedded.com/batterycalc.htm

► Cool Term Serial Monitor (standalone freeware program)
http://freeware.the-meiers.org

► ESP32 Sleep Modes explained
https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/

► List of all my videos (Special thanks to Michael Kurt Vogel for compiling this)
http://bit.ly/YouTubeVideoList-RalphBacon

► If you like this video please give it a thumbs up, share it and if you're not already subscribed please consider doing so and joining me on my Arduinite (and other μControllers) journey

My channel, GitHub and blog are here:
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• https://www.youtube.com/RalphBacon
• https://ralphbacon.blog
• https://github.com/RalphBacon
• https://buymeacoffee.com/ralphbacon
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My ABOUT page with email address: https://www.youtube.com/c/RalphBacon/about