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¬†ūüôā

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 ūüôā Until Christmas, we want to try to send the most of the current pre-orders!

It took me a long time…

It took much too long to my taste, but now all coupons are send to the supporter!

Please check if you got your key and if not, please contact me with your full name and the email address where you registered with startnext at

The first devices are now in production and we hope to get about 80 devices ready before Easter and get them into shipping. Then my engineer will have¬†2 weeks of holiday … this seems necessary¬†ūüôā

The stone…

…which blocked my way for long enough is finally rolling!

Because of the two companies and the amount of unfinished tasks in both I have suffered considerably under burn out in the last weeks :/

But now I have progressed on many tasks and here we go again!

The order page is available now¬†ūüėÄ

You can now pre-order blueReader at ! All participants in the Crowdfunding campaign will get their keys starting tomorrow to order their devices!

The allocation will be made according to a very simple principle:

  1. First the supporters get the devices they order.
  2. If one variety is available in excess, the pre-orders get the possibility to buy the blueReaders.
  3. Every blueReader costs 225 EUR, including shipping and taxes.

So much for today, tomorrow is all about the keys and later I have more details about the software, apps and all the rest ūüôā

eureka (Part 2)…

Today is again a very good day for the project:

  1. The money from Startnext has finally arrived!
    Now I can safely pay for everything, and the engineer has also calmed down as his payments can now occur.
  2. My engineer is also no longer worried for another reason. We have a matching antenna and the corresponding circuits!

That’s what it looks like:

img_0464 img_0463

So we are almost at the testseries!
What’s missing:

  • wireless loading has to be optimized
  • the lipo has to be chosen
  • the board should get round corners

More to that in the next days!

And to show you something in action, a little video…
The current prototype has installed a testfirmware which Scans for a sensor (red led lightning). If a sensor is found reading it,¬†calculating the current value, and transmitting¬†it via bluetooth. The calculation on this sensor is naturally¬†garbage, as the this sensor has been deactivated for some time, but it works also on my current sensor ūüôā

For that: eureka for the second time this week!


The financing has completed …

… finally, all signatures have been made, all confirmations have been written¬†and all documents have been verified¬†successfully!

Now,we have to wait until early November, before the payout takes place. This takes so long because direct debits and co can be easily repurchased and to not have to worry about all these details of the payments, the entire amount is passed to me only after the deadline.

This does not mean that we will not do anything until then! The next prototype is on the road and the boards are ordered. I hope that at the end of the week I can announce some news!

The last few days a question of whether one could still get involved was asked a lot:
Yes, but only when all the others have got their Testseries blueReader. So if the Testseries are produced and shipped, I will look at how many devices are still available. For those there will be a form here on the pages, from which the last ones can be ordered.
The same also applies to the Series blueReader. As soon as the first series is produced and shipped, I will again offer the remaining devices.

After the first series production there will be a normal ordering system on the product side.

it continues…

The campaign is over, now I have to¬†wait…

With 28.610 euros the campaign was supported by you!¬†Startnext will now ¬†start collecting¬†the money¬†from¬†all who have paid by direct debit and credit card. If everything goes well and not too many failed bookings occur due to exceeded¬†accounts, I will be notified in¬†the next days from Startnext and after the collections is finished¬†the money will get paid out to me. According to Startnext, this may take¬†up to 14 days …

Meanwhile, a look at the data behind the campaign is worthwhile:

  • 151 people have contributed an average of 189.47 euros to the success.
  • 5,866 visits have been counted in this blog and 10,020 articles have been read.
  • After¬†payment fees, 27,465.60 euros should¬†be paid out by Startnext.

This was the course of the support:

  • Yellow are the minimum 24,000 euros, distributed linearly over all days of the campaign
  • Green is the accumulated¬†support
  • Blue is¬†the sum of each¬†day

What can be read from those numbers?

  1. A lot of interested people supported the campaign in the first days.
  2. After this first wave, it became quiet.
  3. Shortly before the first end date, some of them quickly showed their support.
  4. With the Extension, some smaller amounts were pledged, but not enough to come close to the 24,000.
  5. Only four days before the final end and after the reduction of the amount to 24,000 euros, from the actually hoped 33,000 euros, another Spike occurred, like first the first end date.
  6. Three days before the end, the sum was reached.
  7. The last two days before the end, almost 6,000 euros were pledged additionally.

I’ve learned that you need a damn thick skin¬†to go through such a campaign. You need to be present in¬†media, have access to a huge network ¬†and a lot of patience and time to answer personal and promptly as many inquiries as possible¬†to sell such an idea!

But so far it was definitely worthy new experience! Usually I have fixed orders, with fixed, pre-determined, budget, or hour / day / week-related billing.

Even if it is not yet clear when exactly the money will come and what sums will be missing, today we will continue to plan the next prototype!

A huge thank you to all of you! I am very happy that it worked and that it worked so well!


The first Step is made…

… the project will continue!

A huge thank you to all supporters who have shown their support for the campaign and making it a success.

For all who have not yet ordered a device via There are still available test series devices! You can still be one of the first to get a blueReader!

Every euro that is now spend on the campaign is helping us to drive mass production more quickly and at lower risk. It would be wonderful if we were to come to the originally estimated 33,000 euros, but also with 24,000 euros we will be reday within our set time frame!

I would also like to thank the numerous participants in¬†. You are mad! In the good meaning, as in the crazy ūüėČ Without your support, your help and your feedback, I would never have been able to come¬†so far!

How does it go from here?

  1. Antenna test:
    Next week the first V2 prototypes with the final antennas are scheduled to run. Then we will learn more about the minimum size of the blueReader and other options for the further development.
  2. Development of V2.2 prototypes:
    We still need these prototypes to look at how small we can make the board and whether it is possible to integrate the antenna directly into the board for loading the device.
  3. Software:
    The next step in the software will be the first presentable version of the iOS software. At the same time I will continue with the optimizations in the firmware to get even more runtime from a battery charge.

I will try to announce any progress¬†as soon as possible to and I will try¬†to explain things that way that a¬†studying electrical engineering or computer science is not required to understand what I am talking about here ūüôā

In summary, it remains exciting, even if the first major and important step has now been successfully mastered and the further funding stands!

so close…

…and yet so far away…

At the moment, there is less then 4,000 euros missing to complete the project! Still almost 3 days left to support the project!

How can I encourage you to collect the remaining amount?

Maybe if I tell you what you get, again:

  • Anyone who supports me with at least 160 euros gets a blueReader!
  • Every blueReader, whether testseries¬†or series, comes in a box, which contains a short documentation along with the blueReader. This documentation contains a brief summary of how the device works and how to use it and where to find updates, the source code, and the apps.
  • Every blueReader, including the testseries, will be fully usable, it will¬†be ingrained¬†into medical silicone, have a built-in battery, talk to NFC devices like the Libre sensor and have a wireless charging adapter.
  • The test series also have an extended warranty, if something does not fit, we replace¬†it!
  • I am working on the integration for iOS and Android. For both platforms, there will be apps that you can,¬†hopefully easily, install. With Android, it is without question possible, Apple always hangs something from Apple’s grace, but I am confident and have already brought many projects to the App Store.

Are you missing something? What can I offer you? Please let me know!

Check out Share this post and hope with me that it will still work!

The last week…

Now the last week of fundraising begins …

This time there will be no more extensions! But will it work? I hope so…

What happened the last week in the project?

We have put a lot energy into the planning and looked at how we can still save money:

We need only one more prototype (version 2.2), because we have found most problems and errors in the design with current prototypes (version 2).
It was actually planned to have up to 3 more prototypes prior to be able to produce the final device for the testseries.

What will change with version 2.2?

This prototype will have an integrated antenna in the mainboard, a flexible and optimized NFC antenna optimized for the application and even a smaller mainboard than the prototype 2. In addition, we are putting a few extra parts on the board to be able to save even more power.

Oh yes power saving, there was something …

Currently I’m still looking at what other options I have to save even more energy. Unfortunately, the experiments had suffered some setbacks as I destroyed my two prototypes (version 2) in the experiments. Now I’m waiting for new prototypes to finally be able to measure the runtime achievable through the software optimization.


Currently I use again a quite earlier variant (the one ¬†shown in the article “klobiger geht immer‚Ķ” , sorry no english translation), but with the current software. Even this huge sized does not bother me in the day-to-day life, however it is quite different from the version 2 prototypes …

What is the meaning of all of this for the project?

Instead of 33,000 euros we now only estimate 24,000 EUR! So 9,000 euros less than we originally planned and thus we are only 6,000 euros instead of 15,000 euros away from a successful financing!

Now I have to adjust the amount on Startnext and lets hope that there will be enough future supporters to reach the remaining amount!

Until then, share and liked please all the project, so that it still has a chance to be financed!


and the Band plays on…

As I already announced: the startNext campaign  goes on! Until the 17th October everybody has still the opportunity to support the campaign!

Please share¬†and like the project! According to the number of visits only half all visitors need to¬†contribute ‚ā¨ 10 and the blueReader would already be funded!

What else is new? The prototype, with alternate firmware, runs and runs. After the first 9 hours of continuous operation it worked yesterday 16 hours without any problems. As I have yet to implement the monitoring of the battery, the battery was discharged very deeply after the 9 hours and the prototype had to spend the last night on a proper charger.

Now the blue reader is running again for over 15 hours and I’m curious how long it¬†keeps¬†sending me values¬†…


Two common questions have arisen:

  • Will the sensor not be damaged it is repeatedly scanned?
    No, after all our knowledge and understanding of the built-chip,¬†the sensor draws the transmissionpower from the nfc-reader. Simply put, you can say it like this: The chip consists of two parts, one¬†measures every minute the Glucose value¬†and does all the pre-evaluation. This current value¬†is¬†written in a memory where all the past values from the last 16 minutes are. In addition, it writes every 15 minutes a historical value into the memory. These are the values which¬†the readers¬†retrieves¬†and from which it generates the curve of the last 8 hours. The other part of the chip for communication with the reader, or in our case the blueReader. This part is “activated” by the electric field, which is build up by the reader. This electric field is not only for the¬†detection of¬†the sensor, it also provides it with power and by “disturbances” of the field the actual data is transmitted.
  • How do¬†you attach the blueReader at the sensor?
    I don’t attach anything at the¬†sensor. The chance is much to high to accidentally¬†rip off the sensor! I still have to pay each sensor out of my pocket, because my health insurance does not consider this system to be necessary…
  • But how are you attaching¬†the blueReader now?
    I’ve secured the first prototypes mainly with Velcro (an industrial type, which consists of Velcro and fabric with adhesive surfaces).I put a plaster or wound dressing over the sensor, one side¬†of the Velcro on it, the other side onto the antenna of the blueReader. The disadvantage of this is that is stick really firm¬†and I’ve ripped off a lot of platters, while trying to put off¬†the prototypes.
    Currently I just use a tape strip, like that stuff that is usually used after the quarterly blood analysis to hold the swab on the spot. You can see Pictures of this in the previous post.

On the technical side, I prepare currently¬†the first version of the “real” blueReader firmware. This will have to do without a few features:

  • Encryption
  • Changeable¬†name
  • Changeable connection¬†pin
  • Softwareupdate via¬†Bluetooth

However, until the final version is needed, there is still some time. I am now focusing on primary and important features to move forward more quickly and to be able to provide access to the sources as quickly as possible to all interested parties.

Incidentally, I also want to draw your attention to a great project: openAPS

What is it now? One of the many ways how you may want to use a blueReader!

Shortly after I began to occupy myself with the continuous monitoring of my blood sugar using the Libre sensor, I came across a bunch of diabetics, very willing to experiment. This international group of diabetics uses data from all possible available CGM systems with only one goal: to be able to use a pump as an artificial pancreas!

Of course not like our real pancreas, because of sugar, especially the interstitial glucose, which increases only delayed, especially if we have eaten well. However, most of the time of the day we eat nothing and yet our pump can not always respond to our values. We plunge into hypoglycemia because we forgot to reduce the basal rate or forgot to take extra carbohydrates to us. We go high because we are upset, stressed out, having an illness, or simply did not properly assessed carbohydrates.

It is at these points such a system can help! Currently, I asses¬†what my own openAPS system, based on a Medtronic pump 522 and the blueReader prototypes, can do! Currently,¬†the pump, still filled with water and not connected to me, sits next to me, and I look at what the system is doing and why, but in the next few days I will venture into the¬†first experiments on¬†myself ūüôā Until now,¬†the predicted values, what I see¬†the with the help of ¬†blueReader and the real, by blood measurements, are looking very good!

Anyone interested in something like this should definitely go here:¬† into the channel and ask¬†for more information ūüôā

… And just now, the blueReader has powered down, again. After 16 hours of continuous operation, where it, very stable, transferred every 5 minutes a value. Tomorrow I will continue to work on the energy-saving options and see if I do not still get it in this one¬†well over 20 hours runtime…

A long wish list for the next prototype has already came¬†out of all the Experiments so far.¬†I hope I can¬†discuss them with my electrical engineer tomorrow or early next week…

Stay tuned!