esp-homekit-sdk VS HomeSpan

Need help - is there any instructions about how to use esp homekit sdk with arduino? I suppose, it could be possible, like, to configure then link it somehow, as it is done with idf sdk itself. I use pio, if it is important. Have downloaded, configured and built a test examples, like lightbulb, everything works, but want to try it with arduino and don't know how to start.

Currently my code is basically just the fan example from the SDK that I managed to change over to a temperature sensor. It reads the sensor on GPIO4 and sends it back to Home. It all works fine. Now my goal is to make it read an additional temperature sensor and return both temps. I'm struggling to do this. Side note, is there any better documentation of the esp-homekit-sdk?

Check out this one: https://github.com/espressif/esp-homekit-sdk/tree/master/examples/common/app_wifi

espressif official hap https://github.com/espressif/esp-homekit-sdk is RTOS based and cannot be used with arduino due to that. But it works, although has some disadvantages, like storing pairing data on the dedicated partition.

and https://github.com/HomeSpan/HomeSpan

You can check out Homespan. Together with an ESP32 you can mostly hook it up with whatever appliance you want. Some soldering/tinkering might be neccesary though, but it’s really great.

If you have an iPhone or iPad you can even do it through apple's HomeKit using the HomeSpan library for ESP32-Arduino. It's really well documented and that way you don't have to program a new app for your phone in addition to the esp32 code.

Also, for esp32 the situation is much better. As arduino core for esp32 is rtos based, it is possible to simply use espressif hap sdk from arduino corr or directly from bundled RTOS. Esp32 is much faster, SRP, which is the most time consuming, takes a second on it, while it could take up to 20+ seconds on esp8266. There’s also a nice HomeSpan app example for esp32/arduino https://github.com/HomeSpan/HomeSpan. Author calls it “library”, but it is more like a complete app, which can be highly customized and, I suppose, it is also possible to reuse just a necessary parts of it, just like a library.