Raggedyman
Posts: 2
Joined: Thu Jan 16, 2020 11:54 pm

Trigger iPhone camera using Pi3

Fri Jan 17, 2020 12:12 am

Hi folks, I’m a total noob so forgive what may be a really easy to answer question.

One interest of mine is night photography and long exposure shots. I use a very good app on my iPhone but I am unable to always be around to manually operate the camera.

There are various ways to trigger the shutter, one of them being a cheap Bluetooth button.

Essentially, it’s a simple thing but it turns off after a while.

What I would like is to interface this button to the pi so I could run unattended long exposures at night. As this little shutter release also has a button for android phones, I was thinking I could trigger that one every 60 seconds or so as a keep alive feature.

I’m not sure where I stand on voltages and direct connection to the GPIO pins. It’s operated by a 1.5v coin battery if that helps. I was thinking an opto isolator for protection but have read that these can pull too much current from the Pi.

There doesn’t seem much info on the net for this, hence the question..

Thanks.

deepo
Posts: 393
Joined: Sun Dec 30, 2018 8:36 pm

Re: Trigger iPhone camera using Pi3

Sun Jan 19, 2020 9:15 am

If your iPhone has a phono port, then maybe you could use this trick:
https://www.youtube.com/watch?v=4pJ31zJKMKw

I also found these pages that could be of interest:
https://shkspr.mobi/blog/2016/02/cheap- ... and-linux/
https://hackaday.com/2016/09/14/hacking ... th-device/

But have you tried to keep the volume up button pressed a long time, to see if the problem with long open shutter is in iOS or outside?

/Mogens

Raggedyman
Posts: 2
Joined: Thu Jan 16, 2020 11:54 pm

Re: Trigger iPhone camera using Pi3

Wed Jan 22, 2020 10:45 pm

Thanks for those links. The headphone hack is a little more complicated as the iPhone uses the volume buttons for more than one task. Therefore it’s I bit too involved for this, shame really as that was my first thought.

The second one however is very interesting. He’s using the button as intended but to launch something else. As the button presents itself as a keyboard, I wonder if I could omit the button altogether and get the pi to emulate a bit keyboard to the iPhone?

More research needed, lol.

Thanks again.

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