darkwin Posted July 28, 2021 Report Share Posted July 28, 2021 Hello, I have a hot spring hot tub with a Hawk 76840 control box. I would like to control the hot tub via wifi. Does anyone have any further data on the control box? I think there could be a way to connect an Arduino board to the control panel? Does anyone know how the control panel communicates with the controller? Quote Link to comment Share on other sites More sharing options...
castletonia Posted July 28, 2021 Report Share Posted July 28, 2021 Currently, Hot Spring does not have any way to control the hot tub via wifi. That should change next year, but I don't have any information I can share. Anything you would attempt would be completely a diy setup. 1 Quote Link to comment Share on other sites More sharing options...
darkwin Posted July 30, 2021 Author Report Share Posted July 30, 2021 Hi, yes I know there is no wifi controller. So I would like to try this with an arduino. I would like to know how the HEAD Control communicates. Is it i2c? Does anyone have the pin layout of the connector? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted July 30, 2021 Report Share Posted July 30, 2021 My guess is that what you are wanting is proprietary and not available to the public. In 26 years, I have never seen a pin layout for a proprietary digital control system on any brand. If you find one, please post it so we can all see. Quote Link to comment Share on other sites More sharing options...
darkwin Posted August 2, 2021 Author Report Share Posted August 2, 2021 Hi, I've seen a lot about other devices. It's a great community in the homematic field. I was hoping to get to know a few in this area. Unfortunately, my knowledge of microcontrollers is not that good. I measured J9. Blue 3.9V Yellow 12V green 0.06V Red 0V (gnd) black 3.9V white 0.06V Quote Link to comment Share on other sites More sharing options...
cranbiz Posted August 2, 2021 Report Share Posted August 2, 2021 Check out the I hacked my 2018 Hot Springs hot tub so I could control the temperature over the internet thread. I believe it has what you need. 1 1 Quote Link to comment Share on other sites More sharing options...
darkwin Posted August 2, 2021 Author Report Share Posted August 2, 2021 Thank you, yes this is whtat i need. Thumb up Quote Link to comment Share on other sites More sharing options...
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