Home Automation

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Home automation is the residential extension of building automation.

It is automation of the home, housework or household activity.

Home automation may include centralized control of lighting, HVAC (heating, ventilation and air conditioning), appliances, security locks of gates and doors and other systems, to provide improved convenience, comfort, energy efficiency and security.

Warning: Working with electricity can result in injury, property damage, or even death if it is not done properly. Please keep this in mind while assisting others. If you are not sure about what you are doing, hire a licensed professional.

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ESP32 power options (alien.top)

submitted 10 months ago by [email protected] to c/[email protected]

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Hello,

I’m currently building a new house (EU). I’m planning to put ESP32 sensors in every room (top corner) with mmWave sensor to have a reliable presence detection.

I don’t know what the best way to power the esp32 is? Wi-Fi coverage should be good enough, so Ethernet is a plus but not mandatory.

POE looks nice but might require a bigger box as ESP32 with Ethernet looks bigger? Also, I’m not sure it will be able to power the mmWave sensor? I only saw 3.3V output. Any recommendations?

5V run from a central location (garage) might be difficult with voltage drop. Any recommendations for some cable specs and maybe experiences?

Last option would be a regular 230V run with 230V/5V transformer next to each ESP32, which also leads to a bigger box.

What do you think would be the best option?

Thank you for your advice!

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[–] [email protected] 1 points 9 months ago (3 children)

Run cat 6a, 48v is a good choice and you can use a simple dc to dc at the esp32 end. Can do the same for the sensor. Throw it all in a plastic workbox.

from a cost and complexity the esp32 with poe is pretty cheap and you can probably tap into spare1 and 2 to run a dc to dc for the mm wave sensor.

[–] [email protected] 1 points 9 months ago (1 children)

the esp32 with poe is pretty cheap

Which make & model?

Throw it all in a plastic workbox.

Not sure where u/Logical-Meta is located, what their standard workbox/switchbox dimensions are.

[–] [email protected] 1 points 9 months ago (1 children)

https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware

18 euro with discounts a 10 plus.

Now from a practical standpoint if it's just a mmwave presence could wire those all back to a central location and avoid putting a micro in every room.

[–] [email protected] 1 points 9 months ago

Thanks for your insights. I was planning to use mmWave (LD2410?), PIR, BLE tracer and luminance sensor with custom 3D printed case.

Basically, what EverythingSmartHome proposes but ideally, cheaper. And I’ll be able to updates parts of it as technology evolves (i.e. mmWave).

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