Hi all, I got a CCTV PAL camera with an OSD I want to control via PC/Bluetooth, merely putting their OSD navigation pins (Menu, Left, Right, Up and Down) to GND with an Arduino ProMini. I tested these pins on the camera board with a multimeter to check their status. They are normally 3.3V, internally powered. I'm not an expert and I was wondering if someone can help me to set the correct connections to Arduino board and how to manage with its pin's status (HIGH/LOW) in order to be safe with the camera. Thanks
Gigi