kHole (Python Version)

Reverse engineered drivers for the Minna kGoal kegel exerciser.

Description

The kGoal is a Bluetooth LE Kegelcizer device, made to communicate with iPhone and android phones. The kHole project aims to make the device accessible to other platforms, such as desktop, arduino, Raspberry Pi, and other bluetooth accessible systems.

Protocol

In terms of communication, the kGoal is a fairly simple device, It uses BTLE to connect to a host, with no pairing or long term key exchange. After this, the host can do the following things:

• Request the values of 2 internal sensors
• Set whether vibration feedback happens via "Squeeze Pillow" or "Control Arm"

That's pretty much it.

To read information from the device, issue a characteristic read request to handle 0x2a. This should return a 19 byte value, similar to the one below:

00 01 04 01 9b 07 67 00 00 00 00 00 00 00 00 00 00 00

The important values are:

• bytes 3-4 (0x019b in example) - This is the big-endian calibrated sensor reading, starting from 0 based on the last calibration setting and going up. Calibration can be reset by hitting the button on the top of the toy, which makes the LED turn green.
• bytes 5-6 (0x0767 in example) - This is the big-endian uncalibrated sensor reading. It'll always report the same range no matter the calibration setting.

Python Implementation

The python implementation in the library allows access to the aforementioned functionality. As it is using pybluez, it will currently only work on linux. But who doesn't do their kegels near a linux box these days?

License

kHole-py is BSD licensed.

Copyright (c) 2016, Metafetish All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
• Neither the name of the project nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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