Hi! I have a big mess in my heating system in my house. All my life I have lived in apartment flats with central heating. But this time I am living in an apartment flat which is heated by combi boiler. I renovated the house knowing that the heater system’s piping was new allready, so I did not change it. A huge mistake… It is BAD! After the boiler the heated water gets devided into two. One is for 5 bedrooms, 3 bathrooms. The other one is for kitchen and living room. The problem is, one is three times longer then the other. So, most of the water is circulated in my livingroom area, which makes rest of the house hard to heat. The plumber did not add any valves and pipes are hidden in bricket walls (cement apartment). I found the pipe behind the dishwasher, break the wall just enough to work and add a valve there. Then made myself a step motor controller driven by ESPHOME and connected it to the valve. Now I can reduce the water circulation in living room, which makes the rest of the house much easier to heat.
Now, what I need is to pid control this valve (which has allready a step motor working on it) to control my living room temperature. In week days only between 18.30 and 01.00 we are using the living room. Rest of the time either we are at work, or sleeping. So, I want to let it cool down up to 16-17C. And on 17.30 it will start to heat the room back up to 21C. In my tests, I saw that, if I completely shutoff livingroom, rest of the rooms heats up way better. I allready have a high power pump in my system. So, I beleive the plumbing is seriously bad. Probably at some point when joining pipes, they overheated pvc pipe and caused it to melt inside and reduce the inside area. This happens in pvc plumbing if an amateur does it. But for now, there is nothing I can do about it.
So I need a thermostat that controls the stepper motor.
I allready use an ESP8266 + DHT22 based temperature sensor in living room; but I don’t know where to start. My heater is not electric. PWM is not for me. How can I get the pid output and change it to drive a stepper motor? I have no clue. Can anybody help me?
In my country floor heating elements also work with heated water. So in discussion above, I could not be sure either you are talking about an electric floor heater or water based floor heater.
If anybody can get me started, I will appriciate much.
Thank you for the cool feature!
I have electric underfloor heating set up in 6 zones, in each zone there is a floor temperature sensor and a room temperature sensor.
How can I set up the PID controller to take both into account? I guess I would need to cascade 2 PID controllers, first the floor one (with a max_temp limit), and the room one on top of that?
heater (Required): entity_id for heater control, should be a toggle device or a valve accepting direct input between 0% and 100%. If a valve is used, pwm parameter should be set to 0.
Hello, what kind of heating system is it ? If floor heating, I don’t recommend changing the temperature with such big steps during the night, as you will consume a lot of energy in the morning to heat up the room.
If you only have water radiators and rooms are in parallel, I think the best would be to use some connected thermostatic valves like Netatmo or Tado. Each room can then request the boiler to heat and regulate rooms independently.
I’m using this smart thermostat for a warm water underfloor heating system with 7 zones. The system is pretty slow to warm a zone/room up (say 0.5 degrees celsius per hour), and has a lot of inertia, and I’m struggling to work out how best to configure things to avoid a big overshoot and get each room warm for the hours of day that are most useful and allow it to cool off at night, say.
Here you can see a room with a 20.5 degrees target between about 8am and 7pm, and otherwise effectively off.
It would make sense for the heating to kick in at 6am or so, and then to stop heating far before it does to avoid the overshoot. As things stand the room is on average warming during the evening+night than it is during the day, which is the opposite of what’s needed!
The only advice is to stop changing the setpoint of underfloor heating systems. Inertia is much too big.
I tried with 1°C decrease in my living room during night, and it never recovered before the end of the morning, even with a commercial thermostat with PID and predictive heating.
So now I keep it steady, and it doesn’t consume more gas than before.
I can now explain it to myself. I took this setting as a basis and let it run for several days. You just have to wait until some temperature oscillations have been recorded. Preferably without windows or door openings.:
Change the parameters via the services so that something happens !!!
It is important to know that the PID values etc. After initialization, you do not have to change them in the Config but via the services for anything to happen. The same applies to (away_temp, sleep_temp, home_temp, eco_temp etc.) !
If autotune fails (it really depends on the regularity of the oscillation), you can extract the required information from the temperature history manually (and you can do it as soon as you have a full period of oscillation, while the autotune often needs to wait several cycles) :
Measure the amplitude of the oscillation Yosc (in degrees) and the oscillation period tosc (in seconds).
This will allow computing the ultimate gain Ku: Ku = 8.0 * difference / (Yosc * pi)
(difference = 100 by default)
Next, depending on the autotune rule you prefer (it provides different results) you can compute the gains Kp, Ki and Kd using the divisors of the selected rule :
ruler
divisor1
divisor2
divisor3
“ziegler-nichols”
34
40
160
“tyreus-luyben”
44
9
126
“ciancone-marlin”
66
88
162
“pessen-integral”
28
50
133
“some-overshoot”
60
40
60
“no-overshoot”
100
40
60
“brewing”
2.5
6
380
using the formulas below :
Kp = Ku / divisor1
Ki = Kp / (tosc / divisor2)
Kd = Kp * (tosc / divisor3)
Example with some measures made on the chart above :
Oscillation amplitude Yosc = 2.1°C, oscillation period tosc = 10200 seconds.
According to Ziegler-Nichols the gains will be :
The resulting gains are a good starting point, you should then tune them to match your requirements, if you need more reactivity or stability, or to decrease an overshoot.
#####################ENDE######################
My setting based on the calculation with ziegler-nichols:
Thank you for this fantastic integration. I have just one question: is it possible to calculate the time the thermostat was on for a day, week, month, or year? It would be nice to have a graph showing the time on.
You could use the History Stats sensor for periods that fit within the purge history time of the recorder, but not for months and years.
If you create a sensor that cumulatively counts how long something was on, then Utility Meter can create the day/week/month/year stats:
You could combine the two to get what you want:
Use a history stats sensor to count on time for today using the start of today as the beginning of the period, and now for the end of the period. Then use a utility meter to create a total for forever/year/week/month.
I would like to configure my home smart PID regulator before winter and since I have time now I can start to make some work . I have an issue that is not so obvious to me.
In my home I have several rooms and each of them have separate valves and wall thermostat. It means that I can control each room separately with set-up temperature for example of wall thermostat or from central from HA.
House has only one source of heating system (gas boiler) that can control by ON & OFF.
Till now I had a problem to control properly rooms since it was one sensor that took control over boiler and other rooms like office or bedrooms have been to cold or to hot.
By this integrity I can make an virtual thermostat and can control each of the room that is very nice. As well virtual thermostat can control of several valves etc. including boiler as well. But my question is how can I ensure that when Virtual thermostat will take control of room (valve) will start boiler and will not off when other rooms will require boiler since it supply whole house?
And I’m not sure how to make it correct due to the goal is to keep boiler ON till each rooms will meet required temperature. After that to shutdown boiler. And as well each rooms if will need more heat from boiler have to ON boiler to be able to heat room.
Is there anyone who had such case as solve it somehow ?
Hello, it all depends on how the system is supposed to operate. You may drive the valves opening directly with the virtual thermostat (with pwm: 0 ), and use an input boolean template to make a logical “or” so that the boiler is switched on if at least one valve is opened.
Hello everyone, I want to use this component with Oventrop actuators via a solid state relay. It is designed with a wax filler and heats up in 2 minutes to fully open the valve, will this thermostat be suitable and will I be able to configure the system?
The winter is coming and many like myself are struggling to setup this integration, I’ve found this very useful simulator that has quite been a life saver, check it out - PID Simulator download | SourceForge.net
There are two versions, I found the first one more easy to use.
Hi, is it possible to modify the preset mode icons?
After the latest OS update, I lost the mode icons. Now, the only way I can fix this issue is by setting them manually. I’ve successfully done this with the AC integration (Daikin), but I’m not able to do it with the Smart Thermostat.
I modified the icons.json file like this, but it’s not working:
Are anyone here still running HASmartThermostat thermostats from ? Are these still working?
As of yesterday all of mine became unavailable and reports "This entity is no longer being provided by the smart_thermostat integration. If the entity is no longer in use, delete it in settings."
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/config.py", line 1437, in _async_load_and_validate_platform_integration
platform = await p_integration.integration.async_get_platform(domain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1070, in async_get_platform
platforms = await self.async_get_platforms((platform_name,))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1145, in async_get_platforms
import_future.result()
File "/usr/src/homeassistant/homeassistant/loader.py", line 1133, in async_get_platforms
platforms.update(self._load_platforms(platform_names))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1060, in _load_platforms
platform_name: self._load_platform(platform_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1232, in _load_platform
cache[full_name] = self._import_platform(platform_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1264, in _import_platform
return importlib.import_module(f"{self.pkg_path}.{platform_name}")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.12/importlib/__init__.py", line 90, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 995, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "/config/custom_components/smart_thermostat/climate.py", line 38, in <module>
from homeassistant.core import DOMAIN as HA_DOMAIN, CoreState, Event, EventStateChangedData, callback
ImportError: cannot import name 'EventStateChangedData' from 'homeassistant.core' (/usr/src/homeassistant/homeassistant/core.py)
After the boiler the heated water gets devided into two. One is for 5 bedrooms, 3 bathrooms. The other one is for kitchen and living room. The problem is, one is three times longer then the other. So, most of the water is circulated in my livingroom area, which makes rest of the house hard to heat. The plumber did not add any valves and pipes are hidden in bricket walls (cement apartment). I found the pipe behind the dishwasher, break the wall just enough to work and add a valve there. Then made myself a step motor controller driven by ESPHOME and connected it to the valve. Now I can reduce the water circulation in living room, which makes the rest of the house much easier to heat.
. I have an issue that is not so obvious to me.
