What is it

Soldered together according to the linked instructable (see here, a separate, printed documentation will not be included in the delivery), the device will allow communication between ds1922L iButtons and the android app LadyCycle (or a provided free general purpose readout android app. This is an improved, more robust design. As a downside, there are more parts than before and most parts are smd.

Why did you make it?

I made this kit because I started using LadyCycle for fertility tracking. I had happily been using EndoTherm® Basal for fertility awareness for more than five years then. But after getting an android phone, I didn't want to have to turn on a pc for every temperature readout any more. This is when I decided to build a bluetooth interface between EndoTherm® Basal and an android app. When I contacted LadyCycle, they were eager to integrate my app in theirs. The basic, general purpose app is available for free. It doesn't allow to use all iButton options available, so if you find something missing, don't hesitate to ask. The LadyCycle app in general is for free, but it would be really nice if you could support their iButton integration with a small donation. The kit is sold at cost price since I have more professionally made pcbs remaining than I could ever use for myself.

What makes it special?

Prices for commercially available iButton bluetooth readers start at 240 US dollars, but these don't offer interfaces to fertility apps. There is, as far as I know, also no other fertility app that allows the readout of internally worn (and therefore accurate) temperature sensors. But bear in mind that this is a development kit, not a medical product!

I am happy to answer questions or to tell additional details (write me just via email, xxengineering@outlook.de). But because I sell as a private person, this is not mandatory. Furthermore, I assume no warranty, exchange, liability or the like. Pictures are similar.