Global phoneConnected variable?

[RKBoss6]

As I'm finalizing development of my iOS app BlueWatch, I've been using a global variable global.phoneConnected as a state-restored way to allow apps to know whether a phone is connected, or just a bluetooth peripheral. Does gadgetbridge have a similar variable that it updates upon connect? It would be really neat if both the apps for iOS and Android were able to use a shared variable so the entire system knows whether a phone is connected. I can see it used in numerous applications, such as the bluetooth clockInfo showing a phone icon if a phone is connected, or something similar. (I've modified the clock_info lib on my watch to do this, would be nice if others were able to see that as well.)

If it doesn't utilize a variable like that, would it make sense to add that to the android integration app? In my mind, it would allow for much more interesting developing use cases, like apps doing different things if phones vs computers are connected, etc.

Upon connect, the BlueWatch app also emits a Bangle.phoneConnected event. Does android also do this similarly?

[gfwilliams]

Well, there's already NRF.getSecurityStatus().connected which will tell you if a device is connected? And I think the Bluetooth widget and the clockinfo already use that to show status?

On Apple devices (like your app) you can just check if ANCS is active (with https://www.espruino.com/Reference#l_NRF_ancsIsActive) since that's the service that the Bangle will be using if it's connected to an iOS phone.

On Gadgetbridge I guess it's less obvious (maybe checking if a GB message has been received since connection) but really I feel like for most users it's probably not something that's ever really going to come up - the bluetooth clockinfo/widget will show if you're connected, and unless you manually made a connection to a PC it's going to be connected to your phone anyway?