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Establish Connection

The watch advertises itself on the BLE media with a specific connection interval (for now it is set to 225 ms). In the advertising ping packets there is a specific UUID that is broadcasted to the air. A central device can see the advertising packets and request for connecting to the watch with a known UUID.

  1. Advertising protocol The advertisement packets of the bracelet contain the following data: Type: 0x16 contents: UUID:
  2. bytes: 0xFFFF Pairing state: one byte: the value of pairing state can be one of the following:

  • 0: this means the bracelet will need passkey (999999) if the pairing starts

  • 1: this means the bracelet will not need any passkey if the pairing starts

  • 0xAA: this means the bracelet is in the pairing mode; the user has done the pairing action. (either the pusher is pushed or the charger is connected/disconnected). The bracelet will ask for the pairing passkey.

  • 0xAB: this means the bracelet is in the pairing mode; the user has done the pairing action. (either the pusher is pushed or the charger is connected/disconnected). The bracelet will NOT ask for the pairing passkey.

Serial number​

8 bytes

Brand id​

2 bytes

HW id​

2 bytes

model id​

2 bytes