garth 0.2.0

Garmin SSO auth + Connect client

Garth

Garmin SSO auth + Connect client

Background

Garth is meant for personal use and follows the philosiphy that your data is your data. You should be able to download it and analyze it in the way that you'd like. In my case, that means processing with Google Colab, Pandas, Matplotlib, etc.

There are already a few Garmin Connect libraries. Why write another?

Authentication

The most important reasoning is to build a library with authentication that works on Google Colab and doesn't require tools like Cloudscraper. Garth, in comparison:

1. Uses the same embedded SSO as the mobile app
2. Only requires requests as a dependency
3. Supports MFA
4. Supports saving and resuming sessions to avoid the need to log in each time you run a script, which is particularly useful if you have MFA enabled
5. Appears to be working on Google Colab thus far 🤞🏽

Python 3.10+

Google Colab, currently, uses 3.10. We should take advantage of all the goodies that come along with it. If you need to use an earlier version of Python, there are other libraries that will meet your needs. There's no intetion to backport.

JSON vs HTML

Using garth.connectapi() allows you to make requests routed to the Connect API and receive JSON vs needing to parse HTML. You can use the same endpoints the mobile app uses.

This also goes back to authentication. Garth manages the necessary Bearer Authentication (along with auto-refresh) necessary to make requests routed to the Connect API.

Instructions

Install

python -m pip install garth

Authenticate and save session

import garth
from getpass import getpass

email = input("Enter email address: ")
password = getpass("Enter password: ")
# If there's MFA, you'll be prompted during the login
garth.login(email, password)

garth.save("~/.garth")

Configure

Set domain for China

garth.configure(domain="garmin.cn")

Proxy through Charles

garth.configure(proxies={"https": "http://localhost:8888"}, ssl_verify=False)

Attempt to resume session

import garth
from garth import GarthException
from requests import HTTPError

garth.resume("~/.garth")
try:
    garth.client.auth_token.refresh()
except (GarthException, HTTPError):
    # Session is expired. You'll need to log in again

Connect API

Wellness

sleep = garth.connectapi(
    f"/wellness-service/wellness/dailySleepData/{garth.client.username}",
    params={"date": "2023-07-05", "nonSleepBufferMinutes": 60),
)
list(sleep.keys())

[
    "dailySleepDTO",
    "sleepMovement",
    "remSleepData",
    "sleepLevels",
    "sleepRestlessMoments",
    "restlessMomentsCount",
    "wellnessSpO2SleepSummaryDTO",
    "wellnessEpochSPO2DataDTOList",
    "wellnessEpochRespirationDataDTOList",
    "sleepStress"
]

Usersummary

stress =  garth.connectapi(f"/usersummary-service/stats/stress/weekly/2023-07-05/52")

{
    "calendarDate": "2023-07-13",
    "values": {
        "highStressDuration": 2880,
        "lowStressDuration": 10140,
        "overallStressLevel": 33,
        "restStressDuration": 30960,
        "mediumStressDuration": 8760
    }
}

Google Colabs

Graph 28-day rolling average of daily stress