Nightscout Alphatrak Uploader

Script written in python to periodically upload Zoetis Alphatrak glucose data to Nightscout.

*Only tested with Zoetis Alphatrak 3

Configuration

The script takes the following environment variables

Variable	Description	Example	Required
at_token	Alphatrak Bearer Token (See below for details)	YGza5ertORghredgUOXAQw...(256 characters)	X
at_petid	Alphatrak Pet ID (See below for details)	12345	X
ns_url	Hostname of the Nightscout instance with http:// or https:// and end with /	https://nightscout.azurewebsites.net/	X
ns_api_secret	SHA1 Hash of Nightscout access toke	162f14de46149447c3338a8286223de407e3b2fa	X
uploader_interval	The time interval of running this script. Default to 30 mins.	30
uploader_max_entries	Maximum number of entries to upload every time. 0 to disable.	0
uploader_all_data	Upload all available data.	False

IMPORTANT for Azure free tier users

Enable server side retry to prevent rate-limiting errors for Azure Cosmos DB for MongoDB operations. Follow link below for details. https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/prevent-rate-limiting-errors

Obtain Alphatrak API Bearer Token & PetID

• Register and run your Alphatrak app on a mobile phone first.
• Install a packet capture app on your mobile. eg. Http traffic capture for iOS. PCAPdroid for andriod.
• Install the required certificate per the packet capture app instruction.
• Scan Alphatrak app to find the api/GetPetActivityByDateWiseList entry.
• Under Request header, find Authorisation:bearer abc.... "abc..." is your at_token.
• Under Request body, click json file. PetId is your at_petid.

Hashing Nightscout API token

ns_api_secret must be a SHA1 hash of an Access Token from Nightscout (Add new subject first in Nightscout's Admin Tools if required), e.g. your Access Token for a subject named Sisensing might be sisensing-123456789abcde.

Obtain your hash with

echo -n "sisensing-123456789abcde" | sha1sum | cut -d ' ' -f 1

(use shasum instead of sha1sum on Mac)

which will print the hash (40 characters in length):

14c779d01a34ad1337ab59c2168e31b141eb2de6

You might also use an online tool to generate your hash, e.g. https://codebeautify.org/sha1-hash-generator

Deployment - Docker

Docker Hub https://hub.docker.com/r/imlovinit1019/nightscout-alphatrak-uploader

• API secret and token are passed as Environment Variables. If you have security concerns, please stop using this script or fork this repository to make improvements. (Docker swarm mode may be required to use secrets.)