The Share to PredictBGL bridge copies your CGM data from Dexcom web services to
PredictBGL Apps/ManageBGL website via the PredictBGL Diabetes API.
The bridge runs as
node index.js and will loop
forever, periodically querying Dexcom's Share web services for new CGM data.
The bridge relays any new data to the PredictBGL website via the REST API.
The website then syncs the data live to all connected devices, such as the PredictBGL iOS and Android Apps.
- A working Dexcom Share receiver paired to an Apple or Android device that is successfully uploading data to Dexcom. You must be able to see the Dexcom data in the Dexcom Follow app for the bridge to work.
- Your Dexcom Sharer username and password
- A ManageBGL account, signup free at ManageBGL
- iOS or Android Apps
Install Node and Node Package Manager (npm) - Mac/Unix
For normal setup, first install node.js on your computer.
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
Install Node and Node Package Manager (npm) - Windows
In a new folder, run: git clone https://github.com/datamystic/share2predictbgl-bridge.git
To install pre-requisities, run
npm install request
To setup the bridge for your account, run these (one per line):
Get ManageBGL's API secret
Note: if you use Mac/Linux, change SET to EXPORT ie export API_SECRET=xxxx-xxxxxxxxxxxxxxxxxxxxxx
To start things rolling, run: node index.js
API_SECRET- A secret passphrase that must be at least 12 characters long, and must match the
DEXCOM_ACCOUNT_NAME- Your Dexcom Share2 username
DEXCOM_PASSWORD- Your Dexcom Share2 password
maxCount(1) - The maximum number of records to fetch per update
minutes(1440) - The time window to search for new data per update (default is one day in minutes)
firstFetchCount(3) - Changes
maxCountduring the very first update only.
maxFailures(3) - The program will stop running after this many consecutively failed login attempts with a clear error message in the logs.
SHARE_INTERVAL(150000) - The time to wait between each update (default is 2.5 minutes in milliseconds)
- If this all sounds too complicated, get a ManageBGL.com account and it is all done for you.
This code is based on and acknowledges the work by Ben West and
Scott Hanselman]blog-post. This bridge logs in to Dexcom
Share as the data publisher. It re-uses the token every
5 minutes to fetch
maxCount latest glucose records within the last specified
This information is then sent to the user's specified PredictBGL account,
making the data available to the beloved pebble watch and other equipment owned
and operated by the receiver's owner. It will continue to re-use the same
sessionID until it expires, at which point it should attempt to log in again.
If it can log in again, it will continue to re-use the new token to fetch data,
storing it into PredictBGL.
This project is not FDA approved, not recommended for therapy, and not recommended by Dexcom.