Hi,
I have a problem connecting a microcontroller and dslr.
First of all, the code and the hardware was tested on nikon d5600 and everything worked.
20 days later, tested on nikon d5500 and it doesnt work. (It wasnt tested by me, but I was present there and it worked, so i need to figure it out why is not working for me).
So, I am using esp32 to connect via shutter release cable so I can remotely take a shoot. I am attaching shematics and some photos.
I need your help and here are some of my conclusions.
1. The wires broked so I had to soldered them again, which may be a reason of not working because I am not specialist in it, I am doing a software. As you can see on a photo, there are black, red and white wire. I used multimeter to check, there is no short circuit and every pin works. By that, it seems there is no problem, but not 100%.
2. When I run my code, the screen on the dslr gets black as its trying to focus (when camera wants to focus, it darks the screen usually), but in the end nothing happens, which tells me some of the signal is being sent. I discovered that red wire always send the signal. If I use pin of a red wire in the code either for a shutter or focus it darks the screen but when I use white wire pin for it, it doesnt. I am not expert in a hardware, so is that normal that red wire is used to only that part or the red and the white wire has the same function? Tought there might be a problem.
3. The cable might be a problem. I am using shutter release cable specific for this dslr model.
4. Maybe I need to turn on something on my camera. I tried with manual focus, with shutter release option...
I am sorry if i need to add anything else to make it easier.