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Perifit Protocol

Introduction​

The Perifit is a Bluetooth LE pelvic floor trainer that reads pressure sensor data. It exposes pressure readings from two points (base and tip) as 16-bit values.

BLE Profile​

ble_names:
  - "Perifit_o)"
services:
  - uuid: "0xaa41"
    characteristics:
      - uuid: "0xaa41"
        properties: [notify]
        role: rx
        description: "Pressure sensor data"

Sensor Data​

The pressure characteristic returns 4 bytes:

[B1 B2 T1 T2]

Where:

  • B1 B2 = 16-bit base pressure (big-endian)
  • T1 T2 = 16-bit tip pressure (big-endian)

Maximum observed pressure value: approximately 0x1378; expected maximum is 0x1400.

Notes​

  • The BLE name contains a closing parenthesis (Perifit_o)) which appears to be intentional.
  • Full UUID resolution for 0xaa41 is unknown — this may be a 16-bit short-form UUID.

Sources​