New project - looking for H&T (indoor&outdoor) sensors and indicator lights

Hardware
1

Hi,

I was not sure if to post this in the “Projects” or “Hardware” section, but in the end I am looking for some hardware advice.

About my project:
We are going to replace our floor tiles on the ground floor level with a wooden floor. As we have a floor heating by a heat pump with cooling function, this raises some issues about preventing condensation by hitting the dew point and preventing mold issues.

The heat pump itself has a centralized sensor which is located on the top level to meet this requirement - doesn’t exactly help me with the ground floor. And my heat pump is from 2012 and therefor not already equipped with the “Stiebel Eltron Internet Service Gateway”, so it’s not smart. Adding it would require hardware exchange and would easily hit around 1500-2000 Euros.

Now - I do have 2 way valves which are triggered by temperature sensors (not smart, hard wired) and these are NC valves. Each room is temperated by a standard, non-smart, hard wired thermostat.

My plan:

  1. Add Humidity and Temperature sensors to each room.
  2. Calculate dew point in HA
  3. Add Shelly 1 devices before each NC valve
  4. When temperature is <5°C above dew point, switch corresponding shellys off (and hereby override temperature controll by room thermostats), reevaluate an power on when tempeature is >5°C above dew point again.

Additionally:

  1. Add outside H&T sensor
  2. Calculate (all year) if makes sense to open a window under current inside and outside conditions
  3. Activate a visual indicator for that.

My questions:

  1. Any issues about the project in general I have not thought of=
  2. Hardware:
    a) which inside H&T sensors? I’d prefer battery driven sensors which are small and preferably Zigbee. I prefer NOT to have Tuya devices. Aqara?
    b) which outside H&T sensor?
    c) shelly 1 device should do the task with the valves, shouldn’t it?
    d) Indicator: Really, I’d prefer a single red or green led, battery driven, flashing once every few seconds in the desired color. But I did not find premade products. Maybe I havent found them, maybe they do not exist. I prefer not to have the need for extra power wirings and it should be a cheap and small solution. Any ideas, anyone?

Thank for reading and for your hints!

2
  1. Aqara are good
  2. I’ve got one outside in a sheltered location and it’s surviving Scottish winters so far
1 Like
3

Thanks.

Any ideas on how to realize a non-disturbing in-room signal? I don’t want to go for wirings, extra ESP devices with display, all I need is a diode which is on or off (or red or green or whatever)…There must be something suitable.

4

Something using WLED? A single LED attached to a WLED controller would do it, and some of the supported controller devices include some LEDs, or are an all-in-one unit