Add Bluetooth scale support

[JuliusLoewe]

Please add support for Bluetooth scales like Acaia. This way you could actually show the actual grams while the countdown runs down instead of a calculated speed. Not sure if there is an open API for this.

[rozPierog]

I'm afraid that won't be a possibility. Acaia doesn't provide API for connecting with it's scales (for Android at least) and other scales with open APIs seem to be in development limbo. What's more Bluetooth scale seem like a niche, and I would like to avoid adding bulk to the app that wouldn't benefit a major percentage of the users.

If there is some open source coffee scale, with robust API, down the line I would be happy to add some Bluetooth functionality to the Cofi, but as of right now I would rather not. I hope you understand

[JuliusLoewe]

It seems there are Android apps that are actually having Bluetooth connectivity. I think this feature is more than useful. So I think there is indeed an API out there https://play.google.com/store/apps/details?id=com.beanconqueror.app

[rozPierog]

Thanks for the link to the Bean Conqueror app, I've studied it's code since it's also an Open Source app, and noticed that it uses https://github.com/bpowers/btscale to communicate with Bluetooth scales. Cofi is written in Kotlin, while Bean Conqueror uses JavaScript (Cordova). There is no tried and working solution for Native Android development, at least I couldn't find one. I'm not comfortable with writing code to handle communication like that without actually having hardware I'm trying to communicate with at hand. I'll be on a lookout for some ready to use library to handle Bluetooth scales, and if something ever changes in that regard I'll reopen this issue and let you know

[JuliusLoewe]

Oh I totally understand and it's great it's built in kotlin. What about the official Acaia API? https://github.com/acaia/acaia_sdk_android