Hi Wellsy,
Thanks for the fast response, and that’s a big help - thank you. It will take me some time to grind through all of that, but in the meantime…
– I saw that @ScottD made a reference to a Wemos D1 Mini in his post here, and then on the SwiCago/HeatPump page in the issues section there is a post titled Please list your unit types that work. IN that, unixko shows a picture of his Wemos D1 Mini setup. I wanted as simple a setup as possible, and I didn’t want to deal with the 5V adapter or the usb-to-serial adapter that I would have needed to program the ESP-01, so I went down the Wemos path instead.
If you look at his picture, the cables are connected the same way as in the circuit diagram picture in the Demo Circuit section of the SwiCago/HeatPump page. I used the same Revolectrix Cellpro-JST-PA-Battery-Pigtail-10-5-Position cable. I also bought a small dipole antenna that connects to the Wemos D1 Mini, but have found that I don’t need it. Even with the Wemos being inside of the sheet-metal box that holds / protects the AC’s circuit board (which sits in my ceiling as I have a cassette-type unit), it’s getting a great WiFi signal without it.
I’ll get working on those other tips you gave me, and let you know how I get on. I’m not sure I fully understand, but will try and grind through it.
Thanks!