[APP][Pro] Alsavo Heat Pump for Swimming Pools

[Michael_von_Barner]

Good morning Gal

At this time, I can only report that Homey is connected to Alsavo And today’s promising day with lots of sun will put it to testing and it will have a some start/stop via flow in Homey. let’s see and I will report to you later in the day

Michael

[Gal_Carmeli]

Thank you, Michael!

[Mainnsto]

It just works great so far!

Now - we have a field for delta-T - if you REALLY would like to nerd-out with it in a future update, you could:
Add a manual input field in app settings where user put flow rate (fixed estimate, or variable from other device), then you could add a calculated capability using Q=m * Cp * dT to calculate the power the heat pump provides to the water in kW

Power [kW] = mass flow [kg/s] * specific heat capacity [kJ/kg°C] * temperature difference [Δ°C]

• mass flow kg/s can be converted in code from flow rate eg. 3600liter/hr~1kg/s
• specific heat capacity can be hard coded 3.85 [kJ/kg°C] for water, or set by user in settings
• both values above depend slightly on salt vs. fresh water (density and heat-capacity). A selection/drop-down could select between hard coded values for both.

…and you can even (now we’re really getting deep), subtract the live-energy the compressor and fan is using - which is also known - and calculate your “live-COP”

Sorry for nerding. In any case, i am already happy with the APP!

ps. i tried both of these by just calculated logic variables, work pretty good - but they are approximates!

[Michael_von_Barner]

@Gal_Carmeli

Hi Gal

My flow start up the Alsavo heating pump, but now it has lost the connection again between Homey and Alsavo

Unfortunately, I cannot send a diagnosis report from Homey. as I have a bug that Homey support is working on. I get this Rate limited error every time I try to send a report.

[Gal_Carmeli]

Darn… I can’t do much if I don’t have the logs…
Cn you please check which app version do you have?
When you restart the app, the connection is restored?

[Gal_Carmeli]

@Michael_von_Barner - one more thing - look at the value of the last capability: “Last Update Time”.

The time mentioned there should be “fresh” (smaller than 5 minutes ago).
Is this the case? What does it show?

[Michael_von_Barner]

@Gal_Carmeli

The last update time was up to date within some seconds.
It helps to restart the Alsavo app, and after that it could stop via Homey.

[Gal_Carmeli]

Wow!
Cool stuff, but I think it’s too complicated for the average user to configure and to use.
I will leave it in the hands of the super-expert users to implement this by a Logic-flowcard, similar to what you are showing.

[Michael_von_Barner]

Hi Mainnsto

I think it looks exciting with the calculations you can now do, but how and where do you do it in Homey?

I just can’t find the “apps setting” that I think you mention in your text?
Would you like to help me a little more along the way?

Michael

[Mainnsto]

I made the calculations with a flow and the in-built logic-functions. First i made the numeric variables to store the number in, then i calculated them all in the same flow. These are so far proof-of-concept and require some extra work. Eg for small numbers (or sensor noise) in power calculation you can end up with very high COP

Edit: For consumption i added the fan as a static 30W, i think its rated between 5W to 35W, so its not alot compared to compressor, however it should be set to 0W when it
s not running.

[Michael_von_Barner]

@Gal_Carmeli

I have tested a little a work today. And after about 1 hour Homey lost the connection to Alsavo. If I restart the Alsavo app it’s working again. I can’t still send diagnoses report

[Gal_Carmeli]

@Michael_von_Barner -

• Which app version do you have?
• How did you determine that the connection was lost?
• When the connection was lost, what was the value of the “last update time” capability:
  

[Michael_von_Barner]

• Which app version do you have?

V.1.0.4

• How did you determine that the connection was lost?

and I know my flow has told it to stop, so it’s still running. then I can see when I go into the Homey app that it says that it is turned off (Homey thinks it is turned off) If I then try to turn it off manually from Homey, it does not respond. it is only when I restart the Alsavo app in Homey that a connection is made again and then I can switch it off via Homey

• When the connection was lost, what was the value of the “last update time” capability

It says that it has been a few seconds since it was last updated

[Gal_Carmeli]

I am not sure it lost connectivity. In the “last update time” is fresh (meaning, smaller than 5 minutes), it means that the app got a communication from Aslavo.

Based on your description. it seems like the functionality of turn on/off doesn’t work properly.

Next time it happens, please do the following:

1. Click on the Turn-On / turn-Off capability on the Homey app:
   
   
2. Open you Smartphone app, wait for 1 minute, and see if you action on the Homey0App is reflected on the Phone-app. For example, if you turned it Off on Homey, make sure on the Phone app that it was indeed turned off.
   Repeat that action a few times.

Let me know what happened with this test.

[Michael_von_Barner]

I can only do that tomorrow after 12

But I have tried to do that action the other times and nothing happens in the Alsavo mobile app when I press on/off in the Homey app

[Gal_Carmeli]

And the “last update time” was fresh? (less than 5 minutes old)

[Michael_von_Barner]

Yes it was

[Gal_Carmeli]

Then something is wrong with setting the values, but the connection is not lost…
I must find a way to extract logs from your device.
Let me sleep on it.

[Soren_Mogensen]

I can’t seem to get mine to work right, I can turn it on in Homey by clicking on/off and via a flow, but it’s not reflected in the Alsavo App and pump stays off.
Last update time shows secs. ago

[Gal_Carmeli]

Great, so we have a reproduction of the issue.
Can you please try again to turn on and off a few times, and immediately after send diagnostics-report?