How does a remote shutter for camera work on Android/iOS? -

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I recently ran on a remote shutter for the built-in camera app using Bluetooth on Android / iOS I am

Here's an example link to the product: (Understanding Technology / Mechanism, not here to advertise but)

As far as I know, It is possible to send remote commands in in-built camera applications because there is no really app for in-app, apps have apps to control remote commands

However, the above video Shows that Bluetooth remote Such a remote control has been achieved using the shutter. I found that there is no need to install an external app to use such a remote shutter device. Is the device only sending touch event action to the phone?

I think my real question is, how would such a remote device send the existing in-built camera app to 'take photo' command?

Thank you,

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Safe stick remotes are just two keys, the original camera shutter of iOS To trigger is the key to a "volume up" and the second key to trigger Android is "Enter".


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