I recently bought one of these crawlspace dehumidifiers for a project, Sentinel HD55. I am looking to automate it for wifi remote control. I contacted the company to see if they would give me some more info about it and the remote control wire port as it is just a cat5 connection.
They responded with some good info. From what they sent it appears that you can do this with a relay board and a ESP32/8266/etc. Possibly even just an ESP32 with enough pins. I am trying to get a little more info from them to make it as simple as plugging in a cat5 pigtail wired to some relays.
Is anyone else interested in this type of control? i.e. wifi remote control of your home dehumidifier? This is a really great unit. It ticks a lot of the boxes. I am not using it specifically for home humidity control. But it is perfect for what I am building sans one thing. You cant just power it off with an sonoff S31. It has a cool down timer set to turn of the compressor but still run the cooling fan for several seconds. If you simply cut power the compressor can be damaged. Hence why I contacted them.
Maybe if there is enough interest they will be more forthcoming with information about the internals.
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