#Simple timelapse/intervalometer app for Flipper Zero, works via GPIO pins.
1 frame - simple timer, 0 frames - infinite mode, -1 frames - BULB mode
When the timer is running, all buttons are blocked except OK.
Take optocouplers, connect according to the scheme: https://theageoflove.ru/uploads/2022/11/camera_cable_en.jpg Camera pinout can be found here: https://www.doc-diy.net/photo/remote_pinout/