Nightscout follower
Old Android certificates
You might not be able to use this feature with phones running below Android 9 if they rely on expired certificates (example).
There is no workaround.
Settings
Hardware Data Source
Nightscout Follower
Nightscout⌁
For using xDrip+ with data coming from your Nightscout site, you only need to enter your site URL.
Nightscout Follow URL
Web address for following
With a classic DIY Nightscout, the URL will look like this: https://sitename.yourprovider.com
Do not add /api/v1
Make sure to use https not http
If you use a hosted service contact the vendor for more information.
If your Nightscout site is secured, you need to add the API_SECRET or a token information.
https://API_SECRET@sitename.yourprovider.com
https://access_token@sitename.yourprovider.com
Download Treatments
You can also download compatible treatments from Nightscout (BG, calibrations, treatments, notes).
Download Treatments 
Also download treatments from Nightscout as follower
If you want to avoid the risk of data duplication (important for AAPS) you can prevent xDrip+ from downloading data it has been uploading to Nightscout.
Skip items from xDrip 
Avoid downloading items uploaded by xDrip
If you experience large delays in xDrip+, you can set a fixed delay to re-synchronize it with Nightscout. Leave this at default.
Nightscout Follow delay
0>
Note
xDrip+ performs limited (24 hours) data backfilling from Nightscout.
Diabox⌁
You can receive data from Diabox by enabling http broadcast in the app and making xDrip+ a local follower.
Warning
You cannot use this feature with xDrip+ running a web service.
Once done set xDrip+ in Nightscout follower (see above) with the address:
http://localhost:17580
