World Diabetes Day 2015 and Blogaversary 3

Eiffel arrivalIt hardly seems like a month ago since I wrote last year’s WDD2014 and Blogaversary 2 post but now I reflect it feels like a lifetime ago.

Three years on and I’m surprised I’m still blogging, I thought my enthusiasm for this fad would have died out by now and I suppose it has a little as I just don’t seem to write so much these days. In reality the problem is time and I’m not sure that’s going to improve any time soon.

World Diabetes Day for me is about reflecting on what we’ve achieved during the past twelve months whilst looking to the future about we’ll achieve, plus the advancements of medicine and tech which help everyone with Type 1 Diabetes.
(I’m posting this early as I’m away for the weekend.)

Motto for the last year

I can sum up the last 12 months in three easy words: Pay It Forward. I’d like to think this has always been my motto but never so much as it has been recently. It’s important to me, it keeps the world spinning in my eyes, it makes may days brighter and when in (thankfully rare) darker moods it’s the only thing which gets me through the day.
So here goes for a few moments of the previous year, but first how’s Amy been getting on?

Amy’s worst moment with Type 1 – Where’s Jacques?

Quite recently we visited Versailles so it’s apt to think this last year was the best of times, it was the worst of times. Unlike in Dickens’s Tale of Two Cities there’s been no revolution but we’ve certainly had two episodes which came too close to kissing the guilotine for my liking. August was marred by two moments when we just took our eye off the ball and by rights Amy should have gone to hospital to quickly get her out of her nose dive towards diabetoketoacidosis. I don’t feel that proud that I didn’t take her in but we wanted to spare her the trauma, but she was scared, we were all scared and yet the first occurrence really proved what a great team our little family unit is, all pulling together for the good of Amy.
That first near-DKA occurrence was a dark moment for me particularly, I’ve never felt so helpless but at the same time the education everyone in the #DOC has helped me attain meant I knew what was going on.
It turns out I can’t even read this tweet without welling up, it’s raw:
nearDKAtweet
Whilst I got lots of advice from the #DOC it was really only Andy Sherwood who kept me going through this as without WiFi or data I relied on SMS and I thankfully had Andy’s number to hand. Thank you Andy.
Anyway, enough of this dark rubbish, let’s move on.

Pay It Forward – with the Pharmacists and Peer Support

In December last year I got the opportunity to help the next generation of Pharmacists learn what living as a family with Type 1 diabetes meant. I thought it went well but maybe not, I’ve not been asked back.
I’ve continued my role as Peer Supporter for Diabetes UK in a slightly lesser manner than before but still get to help people via email. It’s a vital service but I just couldn’t commit any time to answering the phones anymore.

January: time to say #WeAreNotWaiting

On January 1st, in ‘new start’ mode I pulled the trigger and ordered up the components needed to build xDrip and get Nightscout up and running.
10 days later with it up and running I realeasd my first blog about it: #WeAreNotWaiting thanks to #xDrip – Introduction.
I can’t possibly explain it here so read the above article or any of the several #WeAreNotWaiting posts I’ve done.
The xDrip blog articles went wild, especially in the States and are still used by many to introduce xDrip and Nightscout to newbies. I’m quite proud of that.
My involvement with Nightscout and xDrip moved on a stage when I was asked to be part of a team presenting Nightscout to many families at a conference recently. See the posts here and here or watch the videos of the presentations.
My involvement with Nightscout is contuining at a pace and I hope January’s blog(s) may prove interesting and exciting.

March: the #GBDOC conference

The first ever ‘unconference’ organised by Paul and Midge of TeamBloodGlucose was simply brilliant.
The opportunity to meet with several of my online friends was excellent and meeting Veeny was a highlight for me but the effort Jules put in to be able to attend made her the star of the show for many of us.
Later that evening we would learn that toothpaste is an unsuitable hypo treatment. It’s a shock eh?

April: Amy nails a week in Germany

Amy spent a week in April on a student exchange trip to Germany. Not only did she nail her glucose levels sufficiently to have a great time away – some feat considering the family lived so close to the Haribo outlet shop – but she spoken German all the time, one of the few to do so, and nailed an A in her GCSE which she took two years early.

May: Conferences, Public Speaking and Interviews

May was a big month. First, Amy and I spoke a little at the National Paediatric Team Meeting in Birmingham. A super scary time speaking in front of 200 health care professionals.
Then I had the most wonderful time with Chris, interviewing Dr Stephen Ponder about Sugar Surfing on behalf of Diabetes UK. Dr P is undoubtedly one of the nicest people I’ve ever met.

June and August: cycle, cycle, cycle

In June I undertook the biggest cycle ride of my life, cycling from London to Paris in a self-organised and unsupported trip with friends, raising £600 for INPUTDiabetes. The full self-organised London to Paris trip blog is available here if you fancy doing this yourself.
In August I rode the longest ride of my life, 100 miles, supporting JDRF and raising £430 in the Prudential Ride London Surrey 100.

And finally, some statistics

My blog has never been about statistics however it’s really nice to see them improve. Well I say improve, they’ve rocketed since blogging about Nightscout and xDrip.
In the first year the blog had about 11,000 hits.
In the second a huge increase to 27,000 that year, over 38,000 in total.
In the third, because of xDrip, it’s massively increased to 52,000 hits, and a grand total of over 90,000 hits.
The key thing about these numbers is that people are finding the information that matters, and that’s all that matters.

#PayItForward

Presenting Nightscout at CWD FFL 2015 – the videos

This article contains the three presentation videos recorded at Children with Diabetes Friends for Life 2015 at Windsor on November 1st 2015. They are available on the Nightscout UK YouTube channel individually, or as a playlist.

Introduction

Here’s an uplifting video previewing the Nightscout conferences taking part in the Fall Autumn of 2015.

(Watch on YouTube)

Part One

A moving introduction to Nightscout from Wes and then the ‘What Nightscout Means To Me’ presentations from Kate and Jesus.

(Watch on YouTube)

Part Two

Myself, Tim and Stuart give ‘What Nightscout Means To Me’ presentations. Kate introduces Nightscout web pages, apps and CarePortal, Stuart introduces the advanced options, I introduce the reporting options, then take the mick out of Wes’s Apple Watch a little before reminding everyone that Nightscout is DIY, no-one will do it for you.

(Watch on YouTube)

Nightscout Workshop at CWD FFL 2015

You might like to read the article about the morning’s presentation of Nightscout to families at the CWD FFL 2015 conference if you’ve not already done so.

Afternoon Presentation/Workshop

Nightscout UK teamIt seems the afternoon session was the only one actually listed in the FFL programme so we had more people, about 30, attending.
Like the morning session they were really attentive, most of them knew Nightscout already, they wanted it, they needed it and they thankfully had a lot of questions.

 
First we gave the obligatory warning that Nightscout isn’t an approved thing, it can’t be bought, it’s not something anyone would build for you, you should never make a medical decision based on information shown etc. etc..

After debunking the myth that this was a solution only available to nerdy geeks we showed the routes into Nightscout from a ‘How Do You Get Your CGM In The Cloud‘ article, quickly dismissing some of the USA-centric options like Share and focussing on using a Dexcom receiver, xDrip device or using the uploader for Medtronic CGM (not 640g).
Kate showed the original ‘rig’ where a phone is directly connected to a Dexcom receiver as this is what her family first used, but now they use xDrip.

xdrip circuit
xdrip1xdrip2

I presented the xDrip wiring diagram and hopefully quickly busted the myth that it’s hard to build. For me this was the easiest bit to present as I knew most of the audience just got it, for some the penny dropped during the presentation, for some it just reaffirmed what they already knew and thought.
People were keen to see some model xDrips so I passed my two spares to members of the audience, whilst Tim demonstrated the tiny one in a TicTac box which he wears on a band around his bicep which he prefers to do so he doesn’t forget it.
Jesus talked about the components required to build MMCommander to get CGM data from Enlites (for Medtronic 530 and Veo pumps) into Nightscout, which received a lot of interest from the audience.
In the last slide Kate spoke about the different cloud services which were required for a standard Nightscout installation: Azure, for the web site; MongoLab, where the data is held; GitHub, where the code is for everything.

Workshop session

Nightscout afternoon sessionsAt the start of the workshop session we split into two tables, one for Medtronic with Jesus, one for Dexcom/xDrip with Kate, Tim and myself. Stuart meanwhile helped one of the audience members sort out issues with her set up, she left with it working properly.
I spent most of my time showing the two of the different xDrips I’d built, fielding questions about the components or how to build them or issues I faced.

It’s hard to imagine how the session could have gone any better: people seemed to get the answers they needed; people seemed engaged; many said they would order the components that night and set up Nightscout as soon as possible.
From my point of view we had achieved our goal, that one family walked away from the presentation/workshop having discovered something they could set up to help them. But in this case it wasn’t one, it was probably 20 or 30.

Presenting Nightscout to Families at CWD FFL UK 2015

Nighscout FFL, Kev, what nightscout means

Building a team for Old Blighty

Back in September Wes from the USA based Nightscout Foundation gave me the honour (yep Wes, there’s a ‘u’ in honour 🙂 ) of asking me to join a faculty team they were having at the Children With Diabetes Friends For Life UK conference which took place last weekend. Wes was gathering a team of Nightscout and xDrip users together with the aim of showing families what Nightscout does for us.

Nightscout UK team
Left to right: Stuart, Jesus, Wes, Kate, Kev, Tim

And so the team was formed with me, Wes, along with Stuart and Kate whose kids have Type1, and Tim and Jesus who both have Type 1 themselves. Jesus is somewhat of a God (bet that joke hasn’t been said before eh Jesus?) in the community and flew over from Spain for the weekend.

Then Wes dropped the bombshell, he wanted us to present Nightscout, not just give 1-1 advice and info at a stand. Present! What? Me? “Erm, okay” I said very tentatively. Being on holiday for the Saturday I could sadly only attend the Sunday but the planets aligned as that was the day the presentations were (“Oh great!”).

Panicking about presentation slides

At 5am the alarm sounded.
I present often at work and am somewhat reknowned for having whizzy slides full of colour, animation and more importantly eye-distracting graphics which take the focus off of me, but I had a problem as I would have no time to prepare anything as I was on holiday. So at 5am on the Sunday I woke in panic and managed to cobble stuff together and from there on in I felt relaxed, I had a plan, I had slides, I was ready.

A team as one

Nightscout team, anonymousNone of us had met before but after arriving at Windsor and meeting everyone I felt like this was a team which had been together many times, we were so relaxed together, sharing jokes, poking fun, and just understanding everything each other was talking about.
Our first task was to decide who was doing which bits and I found myself volunteering for a lot more than I thought I would. Perhaps I wasn’t so nervous after all.
Wes posted a photo: we were no longer anonymous.

Morning presentation – What Nightscout means to us

The morning session wasn’t advertised in the programme, just on flyers at our stand so we had less than 20 people there, but that was great for my first foray into public speaking. I’ve always felt that if anything I say or write opens the eyes of just one family then I’ve done my job because I know that family will open the eyes of another.
Due to enthusiastically overrunning our slide timing the session really turned into a What Nightscout Means To Us presentation.

Nightscout, Wes opening speechWes opened the presentation with a heartfelt introduction to Nightscout and what it mean for him, it was very moving, speaking about how his son’s T1 diagnosis at 12 months affected the family.
Kate spoke about how Nightscout “makes the diference” and spoke of how the “glanceability” of her glucose readings on a watch reflects what her driving instructor told her “nothing should ever come as a surprise in your rear view mirror”, she’s aware of what’s happening before it escalates into a difficult to deal with hypo or hyper.
Jesus’s story to me is amazing. He’s a parent but he is the T1 and he developed software for himself to monitor glucose readings. One day he heard John Costik’s Nightscout story and within an hour sent him an email to let him know that Jesus could get readings from Medtronic Veo CGM and could amend it to work with Nightscout. I can’t begin to tell you how moved I was by Jesus’s story of selflessness.
Tim’s story was another good one, speaking how great the community is and how Nightscout has pushed the boundaries and helped Dexcom release Share ahead of its original plan. Having Type 1 for 32 years he had a Dexcom receiver but built an xDrip and is pleased to realise the much better calculation engine than that available in UK Dexcom products, with the added bonus of extended life sensors. (USA has the ‘505’ software and Share but this has not been released in the UK.)
Stuart spoke about how Nightscout lets him know “at a glance whether to react or relax”, which along with Kate’s “glanceability” sum up Nightscout very well for me. With his daughter being 13 she is starting to manage her own diabetes and diabetes allows Stuart and his wife to pull away more and only intervene when required, meaning his daughter finds it less intrusive.

My presentation: BG’s are not as important as Snapchat or 5 Seconds of Summer

Nighscout FFL, Kev talking about watchesWhen my turn to speak arose I felt calm, I just wanted to get my story out there, I was somewhat surprised I wasn’t a bag of nerves.
I spoke about how to a teenager almost nothing was more than important the weekend lie-ins and that Nightscout means I’m not worried about whether she’s too low or too high when her bedroom door is closed till noon.
“BG’s are not as important as Snapchat and 5 Seconds of Summer” was my next line. Amy wants to be a teenager and do teenagery stuff like listening to her music and chatting online with friends, probably about the music they’re listening too…and boys…and boys who are in bands…like 5SOS. I mentioned that whilst cooking I can glance at my watch and decide whether I need to intrude on Amy to ask for an early BG check so we can pre-bolus, or adjust to get her at the lower end of her range before eating. Like Stuart’s daughter this is less intrusive for Amy than before Nightscout.
I explained how I use Nightscout to “nudge” Amy. With my range set from 3.5-14mmol and Amy’s set from 4-9mmol (her choice) I know that she would have had an alarm if over 9 but if she reaches 13 for example it’s probably because she’s not noticed an alarm, so I give her a gentle nudge to do a check or make an adjustment.
My key message though was how Amy’s HbA1c’s had changed through her time with Type 1:
hba1c history

Nightscout and how it works

Nighscout FFL, Kev, nightscout reportingKate went into the basics of Nightscout, the website, the browsers and phones and what appears on the screens and gave an overview of CarePortal. CarePortal is where kids and school carers/nurses can enter information about carbs, insulin and many other things into Nightscout which can then immediately be seen by the parent/carer, which in turn means that worries about Hypers may be negated if the parent can see insulin has been given, meaning in turn no panicky phone calls to school.
Stuart expanded on this talking about the ‘pills’ which appear on the screen and show you values such as Insulin On Board, Carbs On Board, and the Bolus Wizard Preview, which based on settings you’ve entered gives you an idea what sort of action might be required to get the child back in range. Stuart stressed that this is only for an idea of what to do and shouldn’t be used without deciding on whether that action is appropriate or not.
Nighscout FFL, Kev talking about watchesI presented about the reports Nightscout gives, comparing them favourably to Diasend which I rarely use now. One report gives you an estimation of A1c and ours said 6.8% prior to the last clinic when Amy got her 6.7% result.
Just for fun us Pebble watch users decided to do a speed test with Wes and his Apple Watch, to see how quick we could all glance out our kids’ glucose level. It took Wes a fair bit or time.

Finally

Finally, it was lunch time, and as the engaged audience left the room I knew the team had done a good job and we eagerly awaited the afternoon session which would include presenting solutions and a workshop where we could solder some bits or help get people going with their Nightscout solutions.

xDrip Test Results (vs Dexcom’s 505 algorithm)

NOTE: xDrip used to be called DexDrip so you might find some references to the old name in this article.

 

xDrip comparison - overviewA graph from a Nightscout website showing
results from Dexcom and xDrip data

Many people have asked questions about the accuracy of xDrip’s algorithm in comparison to the latest Dexcom G4 algorithm, codenamed 505.
To answer this question for himself Andrew Abramowicz decided to get xDrip and an original Nightscout rig to upload data to the same database at the same time, with both sets of data coming from the same Dexcom G4 sensor/transmitter. This then is a true test of how things worked for Andrew and his family. Thanks Andrew for allowing me to use this these images on this page.

PLEASE READ THIS FIRST
a) before using xDrip for prime time use, run these tests for yourself.
b) if you don’t calibrate properly your results may vary, correct calibration is the key.
c) while these results mimic that of the 505, it is still an “experimental algorithm” and should be used with great caution.
d) as (c)…but to add…’especially in children’.
e) before using xDrip decide for yourself if it is good enough for you based on your own tests
f) we are not “endorsing” it for use by others, just publishing our findings.

NOTE:You can click on most of the images to view the full image in your browser.

A little background bit on the data, which you can probably skip
Andrew’s son wears a Dexcom G4 CGM sensor and transmitter and for a while has used a Nightscout uploader rig to send CGM data to the cloud to be viewed on a Nightscout web site.
Andrew recently built a xDrip device, which can also upload its data to the cloud to be viewed on a Nightscout web site.
The Dexcom G4 receiver (which is part of the uploader rig) and the xDrip both read the same data from the same Dexcom transmitter and sensor.
Both are loading their data up to the same cloud database which is then linked to the same Nightscout web site.
Data from both is overlayed together, allowing for an easy visual comparison and ultimately to see any discrepancies.
What’s all those strange low numbers?
If you’re used to seeing much higher numbers – perhaps you live in the USA? – then don’t panic, the glucose values show are in mmol/l because Andrew is in Canada. To work out a mg/dl value from a mmol/l value just (!) multiply any numbers by 18, so 5mmol/l is 90mg/dl, 10 = 180 etc.
An explanation of a Nightscout website graph
The image below is of Andrew’s Nightscout website. For those who have never seen one before here’s an explanation of what is shown.
Top left is the time ’10:50′ and showings that the last CGM data received happened 1 minute ago.
Top right is the last CGM reading of 7.2mmol/l (129.6mg/dl) and this has stayed the same from the previous reading.
On the right is the range axis, showing 22mmol/l at the top and 2 at the bottom.
The dots show show the glucose readings, with green dots being actual readings and blue dots being projected readings.
The rightmost green dot is the last reading of 7.2mmol/l from one minute ago.
The rightmost green dot is actually two dots, one for Dexcom, one for xDrip but they are both the same value.
The first reading shown on the left shows that there was a difference between Dexcom and xDrip of approximately 0.4mmol/l (7mg/dl).
The two red dots on the left are where a calibration has taken place, one for Dexcom, one for xDrip.
xDrip comparison - spot on
More explanations
Here’s a visual explanation

xDrip comparison - chart 1
Comparison overview
Here’s an image showing how close xDrip and Dexcom are for the majority of the time.
xDrip comparison - overview
An overnight test
The next image is of an overnight test showing a hypo in the middle. During the hypo the variance was the largest Andrew has ever seen, before the correction with glucose it looks to me to be about 0.4 mmol/l out, straight after the correction either Dexcom or xDrip appears to have gone wildly out for one reading.
However, no-one I know would rely on CGM data anytime near a hypo situation and never should any treatment been done with first taking a finger prick blood glucose test.

xDrip comparison - hypo - big difference (0.5 mmol!)
At the end of an overnight test
Although there hasn’t been a calibration for 10 hours values are almost exactly the same, maximum out is 0.4mmol/l (7 mg/dl).

xDrip comparison - overnight without calibration
A 48 hour trace
The CGM trace below shows a trace over 48 hours – you can scroll left/right.
At times you can see there’s a difference, potentially 1 mmol/l out at maximum point.
Upper line is at 8mmol/l (144mg/dl), lower line is at 4mmol/l (72mg/dl). Red dot indicates a calibration.
Click here if you want to view the full image

xDrip comparison - 48 hours
Distance test
Here’s a test placing the xDrip at different distances away from the transmitter, showing that at 25 feet it ability to receive data is impaired, yet at 10 feet it is perfect.

xDrip comparison - distance
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PLEASE READ THIS ADVISORY
a) Never make a medical decision based on a reading from any CGM device, whether certified (eg Dexcom) or not (eg xDrip). Always perform a fingerstick blood glucose check first.
b) xDrip is a DIY product, decide for yourself if you wish to use it. Build it, test it, test it again and use (if you want to) in conjunction with a certified receiver.
c) The fact that it is working for us does not mean it’s right for you.
d) Never build a xDrip for anyone else and never sell one.
e) The blogs are provided for information only. We are not endorsing it for use by others, nor promoting it, just merely publishing our information as well as answering questions from previous blog articles.

A Dummy’s Guide to Building an #xDrip – #WeAreNotWaiting

NOTE: xDrip used to be called DexDrip so you might find some references to the old name in this article.

 

If you don’t know what a xDrip device is take a look at this page.

AdaFruit charger magnifiedI was tickled by someone on Reddit who linked to yesterday’s blog about the components required for a xDrip which was entitled “An “Amateur” builds a module for DexDrip”. So here it is, this amateur’s guide to building an xDrip/DexDrip. (The article actually referred to DexDrip as that what xDrip was called at the time.)

Interested in further posts about this subject? Why not like this blog’s Facebook page and get notified of updates, or click ‘Follow’ using the button at the bottom-right of this page.

PLEASE READ THIS ADVISORY
a) Never make a medical decision based on a reading from any CGM device, whether certified (eg Dexcom) or not (eg xDrip). Always perform a fingerstick blood glucose check first.
b) xDrip is a DIY product, decide for yourself if you wish to use it. Build it, test it, test it again and use (if you want to) in conjunction with a certified receiver.
c) The fact that it is working for us does not mean it’s right for you.
d) Never build a xDrip for anyone else and never sell one.
e) The blogs are provided for information only. We are not endorsing it for use by others, nor promoting it, just merely publishing our information as well as answering questions from previous blog articles.

A baptism of fire heat
Although I received lots of offers of help to solder the components together the guys at work told me I’d have no trouble doing it myself, so I decided to try.
First I ordered the soldering kit (iron, solder, stand, helping hands, solder sucker) from eBay and a practice board to train myself with. The ‘helping hands‘ turned out to be worth their weight in gold.
I soldered my first pin, inspected it and then soldered three more, choosing to solder them right next to each other as it seems that a common problem for amateurs is putting too much solder on. With four pins soldered I tested everything for continuity issues, to make sure no excess solder had spilled on to the adjacent contacts and shorted anything out.

practice board face uppractice board face down
So far, so good.
AdaFruit LiPo charger and batteryAttach LiPo-charger connector to battery
My AdaFruit LiPo-charger came with a connector, my battery came with a connector; they weren’t the same.
First job then was to cut the wires from each and solder the battery wires to the LiPo-charger connector.
NOTE: some people remove the connector terminal on the LiPo-charger and solder directly onto the charger board, I didn’t fancy this as I like to be able to disconnect batteries and swap them easily.
DO NOT connect battery to LiPo-charger.
AdaFruit charger magnifiedSolder wires to AdaFruit charger
The AdaFruit Li-Po battery charger then needed a power (red) and ground (black) wiring up.
For my first try I soldered a four-piece-header-pin to the board and used jumper wires to connect to it, but within a week I removed the header pins & soldered the wires directly onto the PCB.
1. Red wire, solder on to 3.3v (marked as BAT on mine), first on the left as we look at that board. Make sure you don’t solder on to the 5v connector.
2. Black wire, solder on to one of the GND connectors, for ease I chose the 3rd from the left.
WIXEL bluetooth wiresConnect wires for bluetooth module to WIXELWIXEL face down
Prepare four wires (red, black, green, blue) with one female header pin at one end and bare wire for soldering at the other.
1. Black, solder to GND
2. Red, solder to 3V3
3. Blue, solder to P1_6
4. Green, solder to P1_7

Other possible options: The header pin option is the simplest way to connect from WIXEL to HM-10.
The hardest (but not too bad) option is to desolder the HM-10’s header pins, then solder wires with two bare ends onto the WIXEL and to the HM-10.
The middle option is to solder wires with two bare ends, one end onto the WIXEL and one bare end onto the relevant header pin on the HM-10. Whilst this might seem easy I think it’s simpler to desolder the HM-10s header pins as above.

WIXEL and BLEConnecting the HM-10 Bluetooth moduleBLE face down
What you do next depends on what you chose to do on the ‘Connect wires for bluetooth module to WIXEL’ step:
If you soldered wires with female header connector at one end when you did the step above then all you need to do next is to slide the correct colour wire’s connector onto the correct HM-10 pin as per the diagram here.
If you soldered wires with two bare ends and left the header pins on the HM-10 then you need to solder the bare wire ends to the correct HM-10 header pin as per the diagram here. This is tricky to do (for me) but not impossible as I found when I made a second xDrip. I choose to wrap electrical tape around each soldered pin/wire afterwards.
If you soldered wires with two bare ends and removed the HM-10 header pins then just solder the bare ends onto the HM-10 as per the diagram here.
WIXEL power wiresSolder LiPo-charger wires to WIXELWIXEL face down
With the LiPo-charger disconnected from the battery (and micro-USB power) you now need to solder its wires to the WIXEL.
Red, solder to VIN
Black, solder to GND
 
The finished product
Hopefully by the end of it you’ll have something that looks like this:
20150109_205710
Note: the picture shows header pin connections for the AdaFruit Li-Po charger but I’ve now soldered the wires directly to the board, it now has a much smaller footprint.
 
Interested in further posts about this subject? Why not like this blog’s Facebook page and get notified of updates, or click ‘Follow’ using the button at the bottom-right of this page.

#WeAreNotWaiting thanks to #xDrip – Components Required

NOTE: xDrip used to be called DexDrip so you might find some references to the old name in this article.

 

If you don’t know what a xDrip device is take a look at this page.

partially made up xDripSince the release of my first comment about xDrip on Sunday morning my Facebook and Twitter notifications have gone crazy: ‘like’s everywhere, comments everywhere, questions everywhere. At stages I’ve been overwhelmed with my phone buzzing with notifications ten to the dozen and me not getting the time to answer the questions. This just goes to prove the level of interest in a set up like this.

By far the biggest questions I have been asked are:
    1. can I really build this myself as I’ve never soldered before?
    2. what components do I need?
    3. where can I buy these components?

The answer to 1 is easy: Yes, you probably can, I had never soldered anything electrical before starting this project, in fact I had to buy a soldering iron/kit just for this.

The rest of this blog should answer questions 2 and 3.

Interested in further posts about this subject? Why not like this blog’s Facebook page and get notified of updates, or click ‘Follow’ using the button at the bottom-right of this page.

PLEASE READ THIS ADVISORY
a) Never make a medical decision based on a reading from any CGM device, whether certified (eg Dexcom) or not (eg xDrip). Always perform a fingerstick blood glucose check first.
b) xDrip is a DIY product, decide for yourself if you wish to use it. Build it, test it, test it again and use (if you want to) in conjunction with a certified receiver.
c) The fact that it is working for us does not mean it’s right for you.
d) Never build a xDrip for anyone else and never sell one.
e) The blogs are provided for information only. We are not endorsing it for use by others, nor promoting it, just merely publishing our information as well as answering questions from previous blog articles.

Components you’ll need to buy, borrow or steal
(Okay, don’t steal, that’s not good.)
Thank you to Johan Lorant from the USA for information about the components he bought.

HM10 v CC41UPDATE WARNING
It seems there’s two types of chip being passed of as HM10, the second actually being a CC41 and it appears these will not work, although some do.
Be careful which one you get, check with the supplier before you order one but bear in mind that that supplier will only know what their supplier told them. Best thing is to get a proper photo of them beforehand and make sure it’s a HM10 as per the picture on the right.
BLE face upBluetooth Low Energy 4.0 BLE Tranceiver HM-10 Module
From eBay seller AudioSpectrumAnalyzers I’ve got a working HM10 (see warning above), in fact he even has ‘xdrip’ in the items listing title. Cost: under £12.
The first one I bought was off eBay for £15.29 from Aura Communications.
WIXEL face downThe heart of the xDrip device is the WIXEL chip.
I got mine – along with lots of stuff – from Hobby Electronics.
Cost: £13.80
In the USA, one place to get it from is from Jaycon Systems:
JS-3237 Wixel Programmable USB Wireless Module

AdaFruit LiPo charger and batteryAdaFruit LiPo (Lithium-ion Polymer battery and MicroUSB charger.
I got the charger from eBay for £7.70 each, I bought two. An alternative is Pimoroni at £7.
I got the battery from eBay too, 1200mAh ones, although note that Stephen (the designer of xDrip) only uses a 500mAh battery.
In the USA one place to get from is Jaycon Systems
JS-1965 Micro-USB Lipo Charger (MCP73831)
JS-3418 3.7 Volt Rechargeable Lithium Battery (850 mAh)
jumper-wires-ff-6in-500x500You’ll need some wires to link it all together. I bought these and cut them in half as I’m going to build another xDrip.
Cost: £2
In the USA one place to get these from is Jaycon Systems
JS-3958 Flat Ribbon Cable – 16 Wire (15 Ft) 1
SolderingkitHaving never soldered before I was in need of a few things, all of which I found in this kit. Note that everything works well apart from the solder, buy some good stuff elsewhere.
The ‘magic hands’ and magnifying glass were a Godsend, I couldn’t have done without them.
digital-multimeter-basic-500x500I wouldn’t be without my multimeter when dealing with electrical stuff but you don’t actually need one. I used one for the first xDrip I built but not for the 2nd or 3rd which I use as spares in demos.
Cost: £10 or so, from any DIY or electronic hobbyist store, such as HobbyTronics.
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