During this lockdown period I am sure I am not the only person to do something that is totally unnecessary. This is just one of those things.
The Intex Purespa hottub is a great product that we have very much enjoyed using over the last year, summer and winter. But to be able to enjoy this spa you have to make sure that the temp of the water does not drop below 6 degrees or the spa will not turn on and start to heat up. This is not a problem in the summer months as the water always stays at a decent temp even without the heater running, but in the winter, this is a huge problem where we live and I ended up having to leave the heater running most of the winter.
Of course, this a huge waste of energy and I wanted to find a way to make it easier to monitor the temp and to be able to turn it on only when I needed it. Now, I could just go outside and check it each morning, that I know I wont do that, so I was looking for a way to get control of the tub over my home network.
I spent many hours looking around the internet and there are some decent projects people are doing out there but I do not have the mechanical engineering or electrical skills to work those out and most of them were still in testing phases and not really ready to go.
But then I stumbled across a youtube video that showed someone doing exactly what I wanted to do. He had made a custom board that can be installed easily enough into the hottub control box that can be controlled from your phone.
I found the link to purchase his board and instruction down in the comments to one of his videos and reached out to purchase it.
I got the board and an email from him with a really good and detailed set of instructions and set about installing the board.
And now I have a wi-fi control for my hot tub that allows me to turn it off and keep an eye on the water temp and to turn it on only when I need to stop the water temp getting too low or to turn it on to heat to full temp at the optimum time.
If you are looking to do something similar I can thoroughly recommend reaching out to JP and buying his board.
My next project now is to work out how I can write a program that integrate this board with Alexa and IFTTT