current Firmware

Way too late, but finally here, a new Firmware for the blueReader 🙂
To install the Firmware, please follow these Steps:

  1. Download from the Android PlayStore / Apple AppStore the App nRF Toolbox: Apple:
  2. Load the file to the phone (the complete, not extracted,  zip-file) to the phone:
    Apple: Connect the iPhone with iTunes and load the file via iTunes->iPhone->File Sharing->nrfToolbox die Datei:

    1. Apple procedure with pictures:
    2. Android: Just download the file on the phone.
  3. Shutdown blueReader, hold the power button until it shuts down.
  4. Bring the blueReader into the Flash-Mode: Hold down the power button until the red LED lights and the green LED blinks.
  5. Open the App nRF Toolbox and choose entry “DFU”.
  6. Via “Select File” choose the firmware file.
  7. Via “Select Device” choose the blueReader.
  8. Start the transfer via “Upload”. Some messages will show up and a progress bar should fill at the bottom on the screen. If its done a success message should appear. If it does not work, please try again from Step 3.

The blueReader should be now up to date 🙂

Changes to the Firmware:

  • Startup should be improved, resulting in lesser “ugly State” messages in  xDrip+.

openLibreReader and status

openLibreReader und Status

today , finally new updates 🙂

Production is now in full swing again after we were overrun at the beginning of December by the DHL strike followed by the Christmas chaos :/

In the next days I will ship the last orders from December and invite more  pre-orders to checkout.

As some have already noted, the openLibreReader app is about to expire, but a new one is already available from Apple and is already waiting more than 2 days for a review.
Before I was able to translate from the german text, i got the mail confirmation that the app has been reviewed and everybody can now update to version 1.0.2.
Please don’t be scared, the version has a bug and no longer displays a TodayWidget. The bugfix is ​​also already for review at Apple, but I have not yet put it into the review to get the current review as fast as possible to TestFlight and I have already committed it to the review process.

What comes with the new version?

Simple AppleWatch support

  • Simple AppleWatch support
    This one is not great yet, but I can not test it myself, as I do not have an AppleWatch yet (please continue to donate a ) .
  • New calibration: linear regression
    Now you can enter the slope and the intersection for an adjustment of the values.
  • Improved reconnect
    The app should now reconnect more reliably to the blueReader or a LimiTTer, if the connection was lost.
  • Improvements in translation.

For all those interested in DIY, all sources are also available at There, the build errors have been fixed and now all needed pods have been added to the repository.

A big thank you goes to the user GerritR for the calibration and the watch support! And of course to all testers who have given me feedback (none of it is lost, I will add your suggestions gradually!).

Also a huge thank you to, Masterplexus, who does not only help voluntarily here in the Support Forum, but has also done a lot of great things with xDrip+. In the current nightly builds you get a much better support and the correct battery indicator for the blueReader, too 🙂


  1. If the App shows a white page once you click on a calibration, please close the app (double tap homebutton and slide it out), restart app and it should work again. Will be fixed with the next update.
  2. The font on the watchApp might be to big for mg/dl display.
  3. Add SweetReader support

To the next level!

The Crowdfunding campaign is finally over, except for a few people who still not redeemed their vouchers , all other blueReaders have been sent 🙂

For this we have improved our production in recent weeks
Now, a small mechanical helper supports us to produce much faster the boards. The boards have been further optimized with the help of all the  experience we gained in the past year. We have also optimized the silicone casting with a complete new processes and the housing have been redesigned for easier casting and a better fitting for the USB plug.

Today, the first 44 boards for the pre-orders have been checked by me for the next production steps.

Thus, the first 40 pre-orderers will soon receive their invitation 🙂 Until Christmas, we want to try to send the most of the current pre-orders!

News about the software

Today I was able to upload the next version of the openLibreReader software to Apple. All testers will receive the update in the next days automatically via TestFlight.

At the same time, I have released the software at for all, including the updated version.

What’s new:

  • LimiTTer support
  • TodayWidget with current glucose and history
  • resolves a bug with the inital value of “no Data”-Alarm which was to low with 2 minutes.

Next on software, it is the 1: 1  implementation for Android and adding further features, especially the calibration.

For the blueReaders, there are now exactly 17 left from the Crowdfunding, more information regarding the current production state I will receive tomorrow, I am very anxious about how fast we can start shipping to all the preorders 🙂

Finally iOS

today i finally submitted the first Version of the openLibreReader app to the Apple AppStore. Hopefully a release will occur in the next few days.  Everybody who wants to participate in testing the app through apples TestFlight can write me an email wir subject TestFlight and email address as well as full name to

As I’m currently traveling I will write  a bigger status update regarding state of production and the opensource link to the openLibreReader repository at the weekend.

Another status update

With today’s ready-packed devices, now 34 blueReaders have been shipped and actually one has already been exchanged.

All who are waiting now: It’s going forward! Every day we are getting slightly better, find new details in production and continue to optimize!

Actually, we had hoped for 5-10 devices a day, but unfortunately we do not make it yet :/ Why?


  • Problems in potting and a possibly poor batch of silicone have generated almost 30 damaged blueReaders we needed to unpack and prepare for another round..
  • Due to too much use of release agents during soldering, components on almost 20 boards were damaged, all had to be checked manually and defective components replaced.
  • Poor pigments have led to bleed out of colors from some blueReaders.
  • A few changed details in the components of the blueReader, which help us to improve the current flow while charging, required a revision on nearly 40 blueReader boards and almost all wireless loader boards that had already been manufactured.

So as always: plenty to do 🙂

Also at the software I am still working on, unfortunately still not completely presentable, but hopefully more in the next days …

The current state is that we still have problems with few devices on Android 7. However, it is still not quite clear whether there are errors in xDrip+ or the Android or something else. But we’re working on it!

folge dem Wert…

Heute erreichten mich auch nachfragen zu dem Thema:

Wie kann ich die Werte auf einem anderen Gerät verfolgen?

Für ein lokales Netzwerk geht das recht einfach zwischen zwei Android Handys. Dazu einfach einen Blick in die Video-Anleitung von jamorhan werfen:

Wenn es auch über das Internet gehen soll oder mit iOS, dann muss man Nightscout benutzen. Ein Diabetes-Management-System in der Cloud. Eine ausführliche deutsche Anleitung gibt es unter zu finden, inklusive des Einrichtens der xDrip-App um die Daten in die Cloud zu bekommen. Für die iOS-blueReader-App wird dies analog sein.

Um den Daten dann zu folgen gibt es neben der eigenen NightScout-Webseite auch verschiedene Apps:

Beispiele fĂĽr iOS:

Beispiele fĂĽr Android: