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JsBergbau / MiTemperature2

Read the values of the Xiaomi Mi Bluetooth Temperature sensor 2 including custom encrypted format.
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Nice works -- a question #29

Closed DazWilkin closed 4 years ago

DazWilkin commented 4 years ago

Thank you for this.

Your code works for me.

I've been trying to get a Golang example working but I don't understand the mapping between the devices handles and characteristics.

Your code appears to use 0x0038 and 0x0046

How were you able to identify these handles?

If I enumerate my devices handles:

handle = 0x0038, uuid = 00002902-0000-1000-8000-00805f9b34fb
handle = 0x0046, uuid = ebe0ccd8-7a0a-4b0c-8a1a-6ff2997da3a6

I'm unable to find characteristics 00002902*

But I do have:

Service: ebe0ccb07a0a4b0c8a1a6ff2997da3a6
  Characteristic  ebe0ccd87a0a4b0c8a1a6ff2997da3a6
    properties    write 
  Descriptor      2901 (Characteristic User Description)
    value         73657420636f6e6e20696e74657276616c00 | "set conn interval\x00"

Am I understanding the mapping correctly?

Thanks!

JsBergbau commented 4 years ago

Hi. You're welcome.

Finding the handle corresponding the the characteristics was really not easy. Since I was completly new to BLE it was a lot of try until it finally worked. I used nRF-Connect App for Android and especially for finding the handle for energy saving I used a hci-log from Android. And as far as I remember there was directly the handle used and no characteristics.

Hope I could help you a bit.

DazWilkin commented 4 years ago

That's very helpful! Thank you