The perfect blend!! Reversing a Bluetooth protocol for better smoothies!
summary
Reverse engineers a bluetooth blender protocol and shows concrete results not promises: captures HCI via macOS PacketLogger instead of hardware sniffer, maps GATT attributes to 16‑bit handles and finds the writable characteristic, discovers blend time encoding as quarters of a second (45s → 180) and implements a Web Bluetooth page that writes custom profiles and actually changes the blender cycle.
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chapters (9)
- 0:00Reverse engineering blender
- 1:40Bluetooth connection basics
- 3:04GATT and services
- 4:28Capturing Bluetooth packets
- 5:36Sniffing HCI on iOS
- 6:38Decoding blend commands
- 7:43Analyzing motor speed patterns
- 8:26Custom blend profile with Web Bluetooth
- 9:30Demo: perfect blend profile
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