Cheap, Simple web-enabled pool automation with Google Assistant Integration

skola28

Member
Jul 16, 2020
15
Dallas, TX
Today I went and integrated the sonoff TH16 temperature sensor for use with the heater control.

I drilled out the existing Jandy temperature sensor, and slotted in the sonoff temperature sensor.

This should allow me to set a upper and lower limit on the heater on/off.

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jonpcar

Bronze Supporter
Jun 1, 2016
545
Gilbert, AZ
Skola...there are entire TFP threads dealing with inserting those DS18B20 temperature devices into the pool plumbing...just about every possibility (some good, some not so good). But I have not seen this one...drilling out an existing temperature probe to use as a casing...haha...kudos, that’s pretty innovative! Nice project...
 
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setsailsoon

Gold Supporter
LifeTime Supporter
TFP Guide
Oct 25, 2015
3,325
Stuart/FL
Let me start of by saying, I'm not an expert -- My understanding that the most efficient way to move water with an electric motor is when you utilize the full power of the motor. And by efficient I mean best L/$. That said, if you run a 3.5HP pump, at the flowrate of X L/min when you could use a 1HP pump to move the same X L/min, you would be saving money.

I agree, maybe you have different speeds required for your setup. Maybe you run your pump for $20/mon 24/7 --- Seems crazy, but maybe! Just think, you could run it for $19/mon if you had appropriately sized motors! I digress.

I have no water features, and the pool guys replaced my 2-speed pump with a variable speed/flow pump. B/c I have a Jandy Aqualink, and this guy sells Pentair (and he was wrong when he told me it was compatible), now I have a variable speed pump that has to basically be run as a single speed pump if I want to control it remotely.

Also, please be gentle on me :) I'm just 'diving' into this after my pool guy really irritated me buy selling me a pump that doesn't work as advertised.
28,
Fantastic simple system! I think you can run a VS pump using digital inputs but that requires an interface for the Pentair pumps or for most simple pools a 2-speed would be easy to control. Once you get beyond a very simple pool or even when you just add a salt generator a VS pump is a far better choice. Is there an 8 channel SonOff?

Chris
 
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MRoz

New member
Sep 10, 2020
2
Orlando, FL
Skola28
Thank you for the post.
I currently have a Jandy control board with the Aqualink RS4. My issue is that my relays have failed, and the system I have is so old they don't make replacement relays for it anymore. I will have to get a new control board, that doesn't fit in my current cabinet. It will cost over $2,000 to get the new replacement control board, relays, and cabinet. Seems like a lot of money to me. The tech was nice enough to hardwire my pump so it is on right now.

I have been looking at your system and drawings and it seems like you had a very similar problem and I am thinking I will just replace my whole system with your system. It looks like if I want to control more than just the pump I will need to add a relay for each device I want to control, up to 4 for the 4 Sonoff switches (heater, blower, lights, and pump). Since I have to replace the relays should I just get 24VAC relays? If so would I be able to skip any of the DC components?

Looks like you just clipped the 6 pcs barrier strips in half to divide your bus bars in half?

I also noticed in your pictures you have a Supco transformer, but in your video, you have the White Rodgers. Is there a reason why?
 

skola28

Member
Jul 16, 2020
15
Dallas, TX
My issue is that my relays have failed, and the system I have is so old they don't make replacement relays for it anymore. I will have to get a new control board, that doesn't fit in my current cabinet. It will cost over $2,000 to get the new replacement control board, relays, and cabinet. Seems like a lot of money to me. The tech was nice enough to hardwire my pump so it is on right now.
Is it the 'big relays' that control the 220V pumps? Or from your description, more likely, its the relays built into the control board? (The ones shown in the picture below)
ControlBoardRelays.png

Either way, both are definitely replaceable, even if they don't make the same one anymore. The control board ones are much harder! But if you're looking at throwing the whole thing away, it'd still be worth trying, even if you completely destroy it :) (highly unlikely btw)

Send a picture of the broken relay!

I have been looking at your system and drawings and it seems like you had a very similar problem and I am thinking I will just replace my whole system with your system. It looks like if I want to control more than just the pump I will need to add a relay for each device I want to control, up to 4 for the 4 Sonoff switches (heater, blower, lights, and pump). Since I have to replace the relays should I just get 24VAC relays? If so would I be able to skip any of the DC components?
In essence, yes: you need one relay per thing you want to control. Some of the devices need SPECIAL relays for many reasons. The heater and lights can run directly off the SONOFF relays. The pump definitely needs a separate relay, but you can scavenge it from your current system (as I did).
The blower, I don't no for sure (as I don't have one, but happy to help you figure it out!).

Looks like you just clipped the 6 pcs barrier strips in half to divide your bus bars in half?
Yep, I didn't have space in the box to have the full bar for each wire. I'm not super happy with the way it turned out b/c of the relatively exposed ends on the barrier strips where I cut them, but I could add some sort of plastic rubber compound to finish it off.

[/QUOTE]
I also noticed in your pictures you have a Supco transformer, but in your video, you have the White Rodgers. Is there a reason why?
[/QUOTE]
Well, to be honest, when installing the heater, I accidentally shorted the wires from the Supco (i think) and ruined it. So I had to buy a new one. I only went with the White Rodgers the second time b/c I think Amazon was out of stock of the Supco, or shipping was longer. You really should try to salvage the current pool transformer that you already have though. Its tucked back in that box behind the control panel and is a much higher quality transformer (I think).
 

MRoz

New member
Sep 10, 2020
2
Orlando, FL
Thank you for your response!

Busted Relays - The manufacturer emailed me back today and gave me a supplier that has some for $5 each, so I think I will order some and see if I can replace them.
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Old control board.
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