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Elvie Trainer Protocol

Introduction​

The Elvie Trainer is a BLE pelvic floor trainer that reads pressure via polling (no notify). The device requires several squeezes to wake up before it will accept a connection, and may need multiple connection retries.

BLE Profile​

ble_names:
  - "???"
services:
  - uuid: "0a09fff0-dcac-7001-ed03-030502030401"
    characteristics:
      - uuid: "0a09fff1-dcac-7001-ed03-030502030401"
        properties: [read]
        role: rx
        description: "Pressure data (polled)"

Sensor Data​

The characteristic is read in a polling loop (not notify). The response is a byte array; byte 5 (index 5, the 6th byte) contains the pressure value.

Observed range: approximately 9–21.

from bluepy.btle import Peripheral, UUID

p = Peripheral(mac_address)
svc = p.getServiceByUUID(UUID("0a09fff0-dcac-7001-ed03-030502030401"))
ch = svc.getCharacteristics(UUID("0a09fff1-dcac-7001-ed03-030502030401"))[0]

while True:
    print(ch.read()[5])

Notes​

  • Device requires several squeezes before it will accept a BLE connection.
  • Multiple connection retries may be needed.
  • Whether pressure values wider than a single byte are available has not been confirmed.
  • BLE advertisement name is unknown.

Sources​