Android Question LED switch on / off

[pucki]

I'm from Germany and there are electricity meters there where you can query the consumption figures.

To do this, you have to light up a diode and thereby enter the code so that you can access the device. I wanted to trigger this "blinking" via APP.

So I press a button and the LED (of the speed camera) goes on and off according to my specifications.

My question is: How can I turn the LED on or off ???

Many thanks for the answer

greeting

Pucki

p.s: This text was written in DE and translated via Google translator. I can read English well, but I can't write. Sorry

 

[MikeSW17]

If I understand the translated problem, these threads may help:
https://www.b4x.com/android/forum/threads/turn-on-off-flash-led.100758/
https://www.b4x.com/android/forum/threads/led-light-for-communication.35743/

 

[pucki]

I ONLY want the flashlight switch ON and OFF whis my Prg. Thats all.

I looked in the Camera + Camera2 Libs but i don't found the Command

Can anywhere post me a little Code (2-3 Rows) and the Libs as why use.

Many Thanks

Pucki

 

[emexes]

I ONLY want the flashlight switch ON and OFF whis my Prg. Thats all.
I looked in the Camera + Camera2 Libs but i don't found the Command

This might get you there:

Android Example - Turn your camera flash light into a torch

Alternatively, perhaps flashing the screen black/white might be enough. Reminds me of an old interface to a (Timex?) rolodex (not Rolex) watch.

 

[emexes]

Reminds me of an old interface to a (Timex?) rolodex (not Rolex) watch.

Using a flashing LCD monitor to transfer data mentions Timex DataLink watch.