In my opinion best spot is bed height in bedroom as temperature and humidity may vary especially in winter months. For other rooms is the same. This is approximately sitting height.
Placement should not be on a wall or close to radiator. So you will have to find some spot.
Since I’m doing a remodeling I have the luxury to get power there I need and can place the box for the thermostat there I want to.
Idk where you live, but if it’s in Europe you know how we do our electric so I basically just add electrical in wall boxes, one for the esp and electric and from there route the flexible hoses to the box for the sensor. The sensor will be placed in a box alone with a temperature sensor wall cover like thie one below. A 3d printer mounting plate til ensue the sensor to be in the in the outer cover (where the holes are)
To both you and @ddaniel thank you for the tip about bedrooms, having the sensor lower here seems like a good idea
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I grew up in Italy but live in the US now. My house in Rome is built the way you describe with one or more electrical boxes in each room and conduit for wires going to all electrical switches/outlets/devices/etc. However, you may need a parallel set of boxes and tubes given it is generally forbidden to mix high and low voltage in the same boxes/tubes. While there are many considerations to be made, I would avoid running 230V to each ESP32 box. I would go with 12V or even just 7V to 9V to allow for voltage drop and retain margin for the regulator that brings it down to the 5V typically required by ESP32 boards. You’ll need to figure out a way to minimize heat generation of the regulator and ESP32. If you don’t have voltage drop issues, then running 5V directly could spare you some heat. POE could be an option too but I believe that will increase cost and still cause heat issues.
I’m planning on mounting the esp set in separate boxes with the same type of cover as the sensors for ventilation/heat to get out.
I’m using HLK-PM03 as AC to DC transformer, all is mounted on custom designed PCB. I’ve made some general use PCB that all is the same but can be set up as I wish for that specific usage. I’ve been running some beta ting and it seems like the heat is ok with the vented covers.
Yes I will run separate low voltage and network hoses. I could run low voltage to the esp, but probably not lower then 12vdc because of voltage drop, so I really hope my 230vac solution works better. But the tubes are there if I would like to round dc. I’ve been think of POE since all cable network have this from my rack, but with so many esp units it’s a lot of extra cable and connections. 230vac is much easier to handle and distribute
This is a typical set up. There are three sizes of electric boxes it made to fit, single, 1.5 and double size. For 1.5 and double there will be possible to add add on modules like custom boards with relays, optocouplers, separate ADC and such
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