.. _label-section-context:

Background Information
======================

About BLE-YC01
--------------

The BLE-YC01 is a low-cost 6-in-1 probe with BLE capability. Some attractive features include:

* Multi-sensor

  * pH
  * ORP: Oxidation-Reduction Potential
  * TDS: Total Dissolved Solids
  * EC: Electrical Conductivity
  * Temperature
  * Chlorine [#f1]_

* Replaceable batteries
* BLE connectivity
  
About this document
-------------------

This is a write-up of the steps I took to reverse-engineer the BLE-YC01, which was done with the following goals in mind:

* Understanding the BLE interface in order to obtain sensor readings without depending on the mobile app provided with the product, allowing to integrate it with other systems.
* Understanding how the measurements and sensors are implemented.

Disclaimer
----------

All knowledge and methods used to produce the reverse engineering presented here are either publicly available on the internet, or are the private property of Dawans Egineering, SPRL. I obtained no prior information on what BLE-YC01 is or how it works before I started this analysis. I also did not use any private IP, software or tools developed by third parties to help me in this analysis beyond their intended purpose.

.. rubric:: Footnotes

.. [#f1] Not an actual sensor, but computed from other readings.