Fetch value from external sensor via bluethooth

1. What is the issue? Please be detailed.
I am exploring option if I can use ODK collect with the smart weighing scale. I am looking for a weighing scale integrated with handheld QR code scanner. example,

I would like to fetch and store value of weight and QR code in ODK collect form.

Above seller offers their own APP that fetches and store weight of the item once QR is scanner.

Any chance I can same value on trigger in ODK collect from that other APP?
All suggestions and feedback are appreciated.

2. What steps can we take to reproduce this issue?

3. What have you tried to fix the issue?
Trying to understand how ODK sensors framework can help me.

4. Upload any test forms or screenshots below.

The app will need to return a value to Collect.

See https://docs.getodk.org/launch-apps-from-collect for how.

So i will have to ask that other app owner and developer to allow the value sharing with ODK?

Yes, they have to make a change in their code to allow value sharing.