Design Peripheral/GATT Server support

[jyasskin]

Split from #22. I have an initial sketch for this at https://docs.google.com/document/d/1BKBY39CeUWzkmEExTml0JUEy2eHD4upixt1_7zqjMkg/edit?usp=sharing, which is open to comments. It's not a priority for the first release, but we can collect ideas here so they don't get lost.

[jyasskin]

FirefoxOS is working on a server API at https://groups.google.com/d/topic/mozilla.dev.webapi/OCkEhkpwqVk/discussion / https://wiki.mozilla.org/B2G/Bluetooth/WebBluetooth-v2/BluetoothGattServer#BluetoothGattServer.

[martijnthe]

What's the status on Web Bluetooth peripheral / GATT server support?

JFYI, I'm seeing JS APIs being designed for this in the IoT/device community. For example, a couple existing JS BLE APIs:

• Zephyr.js based their JS BLE peripheral API on bleno: https://github.com/01org/zephyr.js/blob/master/docs/ble.md
• Another JS BLE peripheral API (limited to basic advertising): https://github.com/Samsung/iotjs/blob/master/docs/api/IoT.js-API-BLE.md

[jyasskin]

We're planning to do the scanning API first. After that, we'll take any existing peripheral/server APIs, especially ones linked here, into account when designing the web API.

[jracle]

Voting strongly for this feature!

[josephrocca]

Looking forward to this. My specific use case is to allow users (via a web app) to use their phone as a microphone for their laptop or other device. There are of course more details, but that's the 1 sentence summary of the relevant part. If I understand correctly, that would be possible with this feature. If any of the pros here have roadmap estimates and/or details on what's happening in this space across the various implementers and relevant committees, I'd love to hear those!