bluetooth

BT RE notes

Taking logs

Android: Settings > System > Developer Options > Bluetooth HCI Snoop log

“It creates a file called “btsnoop_hci.log” in /sdcard but it’s just a pcap”

On some posts regarding the the bluetooth snooping it was recommended to first turn bluetooth off, enable snooping, enable bluetooth, do tests, disable bluetooth, disable snooping; exactly in this order. Otherwise the logs might not appear. -https://forum.fairphone.com/t/location-of-btsnoop-hci-log-file/60320/2

iOS: https://www.bluetooth.com/blog/a-new-way-to-debug-iosbluetooth-applications/

handles

https://btprodspecificationrefs.blob.core.windows.net/assigned-values/16-bit%20UUID%20Numbers%20Document.pdf

https://www.bluetooth.com/specifications/assigned-numbers/

00002a37-0000-1000-8000-00805f9b34fb

Python

bleak is good library

Device notes

Mi Home LYWSD02MMC (the e-ink one)

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humidity = data[2]
celcius = ((data[1] << 8) + data[0]) / 100

Mi Home LYWSD03MMC (the tiny one)

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temperature, humidity, voltage = struct.unpack_from('<hBh', data)
temperature /= 100
voltage /= 1000

pebble 2 HR

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hr = data[1]