Dear Diabetes, You Suck

life with type 1 diabetes

Tag: blood glucose testing

Preparing for your Night Scout Build – Extra Help

May 11, 2015 /

I had a great time building my Night Scout, but I was really nervous about having the right parts to complete the build. The directions for building the Night Scout are incredibly detailed and amazing, that being said, sometimes I need a little extra help — here are some extra pictures and detail to help you prepare before starting your Night Scout build.  I have explained my decisions, but if you want the a + b directions they are in blue bold text through out this post.

First to clarify, I am building the least complicated model — just the Dexcom reciever to an android phone, not including the pebble or any other additional device (I plan to add/upgrade later).

Physical Components: 

The 4 things you need: Dexcom G4 Receiver, USB to mini USB cable (same as the cable used to charge your Dexcom), Smartphone supporting USB OTC and an OTC cable

1) Your Dexcom G4 Receiver and the USB to mini USB cable used to charge your Dexcom (any USB to USB mini cable can be used)

2) Smartphone supporting USB OTC — I could attempt to explain, or link to explanations, of OTC technology and how to tell if a phone is going to work, but our reality is that we just want this to work… with that in mind, I highly suggest just buying a phone that has been validated rather than going through your build and being frustrated by it not working. The Night Scout Build Page give a full list of phones that work with carrier details and a list of phones that have not worked. Here is a consolidated list of devices that I used to determine which phone to buy.

From looking at this list, and reading other people’s build stories, I would recommend picking up a version of the Samsung Galaxy (Other than the Mini or the Core Prime, see my simplified list of OTC phones)  — that being said, for cost purposes, since the phone does not need to work as a phone, only as a data transfer device, picking up any proven phone model from eBay or a certified pre-owed from your current cell phone carrier is a totally valid option. I fully tested my rig with an eBay purchased Samsung Galaxy 3 on wifi only, before investing in adding an additional phone to my wireless plan (enabling my Night Scout to work when wifi is not available).

The phone must be running Android v 4.x for the Night Scout app to work. If you are also interested in building the xDrip device the device will need to be on Android v 4.3 in order to support BLE.

3) OTC Cable(s) – again, here I could explain/link to explanations, but rather than all that — this is the OTC cable I purchased, I prefer the “L” shaped end of the cable to help minimize the chances of the cables being knocked loose. The linked cable is a two pack, as with any other technology, I would recommend at least two cables for replacement purposes, but also for testing, to ensure your rig is working (see other Night Scout documentation for more information on cables, replacements/reliability).

My current rig consists of a Samsung Galaxy 3 purchased on eBay, previously used on Verizon, the above linked OTC cable,  my Dexcom G4 receiver and a USB to USB mini cable as pictured below.

Once you have the components — I suggest that you verify your version of the Android operating system before starting with the build. 

Now you are ready to build your Night Scout device! Start here!

Simplified Night Scout Phone List

May 11, 2015 /

Below is the summarized list of phones that I used to make my decision when building my Night Scout Device*

Night Scout Phone List

 

*It should be noted I compiled this list based on available Night Scout information, after first failing using another phone. Additionally, this list does not include carrier information, some phones have only been tested on specific carriers, for my purposes I assumed that the technology was based on the device and would be compatible with a wifi only build, and then later with a build on a major carrier — this is not necessarily true, it was my assumption that has held so far for my builds.

Diabetic Dashboard

February 3, 2015 /

People ask “How are you doing?” all the time, usually I answer with “fine”… well here’s a more comprehensive and Illustrative answer…
 

 

This is my latest take on something that could help me to better understand my diabetes and how to manage it. For right now I’m really just reporting findings, but as I get a better sense as to what I can pull out of my devices, I will switch gears into focusing on insights that I can pull out of the information.

Let me start by saying that I used professional tools to get to this point — I could have stuck to excel, but it would have taken me a lot longer and wouldn’t have been a repeatable process. My goal is to hone this process, so I can get as close to real time as possible — based on the level of effort required, I think that the most practical estimate for this is probably a weekly report, but the process is going to need work to even get to that point.

How did I get here? [the geeky stuff] Dexcom reports out two sets of numbers — the meter values that you input to the receiver (calibrating it), and the reported values that show on the screen every five minutes, these two sets of data are reported separately, but in the same worksheet. To add to this, when I updated the software on my Dexcom receiver it archived my file to date and created a new file, so I have to files one from when I started with the Dexcom to the software update, and then one from the software update to present day. What I needed to do was split and clean two data files, and then add together the corresponding parts, from there, I added an additional field identifying each of the data points as either being a “Meter Value” or a “Dexcom Reading” — which then enabled me to join the two tables back together as a single table with the fields of Time, Blood Glucose, and Type. This is the data set that I pulled into TableauPublic to build the visualization below. There were around 65k records, so we have a good bit of time in TableauPublic before we will have to think about filtering the data set down in anyway.

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