How to write to a descriptor in Ionic Ble - ionic-framework

I am using the ionic ble library to communicate with a bluetooth device. Currently I am not seeing any function to write to a descriptor. Is this possible with this library?

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How to listen to audio stream in flutter web

I'm working on an app that works with audio in real time measuring things such as intensity. I need it to run on Android, IOS and web. I already covered Android and IOS using flutter_sound package, which allows me to access the byte stream and do stuff from there. However this is not possible for web, since the codec used by flutter_sound that gives access to stream is not supported by web browsers.
Is there any package for web that allows byte handling or any workaround to this?
I've been searching with no success. So far all packages that I found that support web only allow to access data through files

Flutter Reactive-BLE how to do OTA

I am trying to do an OTA Update on my bluetooth device. Therefor I got some gbl files, which I need to read out and send via flutter_reactive_ble to the bluetooth device. Does anyone of you know how to readout the gbl file and then convert it, that I can use writeCharacteristicWithResponse for this?
I am using this library: https://github.com/PhilipsHue/flutter_reactive_ble

Launch a Unity app on in-coming video call in Agora video call SDK

We are using Video Calling SDK for Unity, We want to wake up the app on an incoming call.
Problem:
We send a push notification when the video call starts, we want to ring the phone.
How do we achieve that?
First, the Agora Video SDK is actually more a "chatting" or streaming SDK. It doesn't include any phone calling capability. You may want to consider building a client-server architecture in handling notifications on the underlying OS. You will need to research on native APIs on how to ring the phone and then build a native bridge to invoke functions from the Unity application layer for further business logic.

Is it possible to connect an external camera module to an iPhone audio jack?

I want to run an app from the iPhone that controls an external camera module (like those found on a mobile phone). Has this been done?
No, it's not posible to use any external hardware with the iOS limitations.
Also...a camera module...
Sorry

Capture audio from dock connector

I'm writing an app which captures audio from the mic input which works fine but I want to capture audio from the dock connector rather than the mic input. I know that pins 5 and 6 are audio inputs, so my question is from a software point of view, is this possible and would I just use the AudioToolbox framework functions as I am now?
No. This is not possible for regular apps on stock OS iOS devices. Inputs on the dock connector appear to be inaccessible from any app except when working under Apple's MFi program. You have to contact Apple for any information on enrolling in this program, which may involve some paperwork.
Apples Camera Connection Kit might allow using USB microphones for input. There are also some 3rd-party audio dock input products.