Thanks for replying!

I am using fwrite, nothing fancy.
I can't use 4bit mode, the board has an SD slot that is hardwired to 1bit mode. it's a camera board, so not a lot of GPIOs to spare :)

static void capture_and_save_photo(void) {
int64_t t_start = esp_timer_get_time();
camera_fb_t *fb = esp ...

I have an esp32-s3 wroom camera board. I have an Arduino program that takes a picture and save sit on the SD card. Nothing really fancy. It works well, it saves the picture in 1-2 seconds. I didn't time the write speed, but I would estimate 500KBps or higher. I ported it to esp-idf and I am having ...

Esp32 cam comes with 4mb of ram.
Did you try the web streaming example? If you can change the image size to 2MP then you have the ram.
This line tells you if you have psram: if(psramFound())

Btw, I've noticed, if you leave GPIO 0 connected to ground after you restart the program it says it has 0 ...

Moving SDA on pin 14 fixed the issue.

I have to connect an i2c light sensor to my ESp32 cam, to read the light level in order to set the proper exposure for an ov5640 sensor (the sensor has its own registries that are supposed to work, but they are unreliable).
I only need to read the light once, before the camera is initialized. My ...

I have the same module, and like others I am experiencing wifi issues even with the board a few feet from the router (the only router).
I think it is a hardware issue, because other boards, like the m5stack camera board works fine.

I've been working for over two months at this program, so I hope it is helpful for others.
https://github.com/raduprv/esp32-cam_ov2640-timelapse

Looking forward for any feedback.

I've been playing with this sensor for over a month, and found out many of its 'secrets' (undocumented things), but for the life of me I can't see how to do manual exposure.
I can get really long exposures by playing with the clock dividers, adding pixels to lines and lines to the frame, but I can't ...

Yeah, I have some other plans with this board (a hidden time lapse camera that I put in public places to create timelapse videos of life in general). I didn't get to the hardware part yet, I am still working at the software (ov2640 is not very well documented, so I had to do a lot of work to ...

One other thing, why don't you just use a lifepo4 battery, with a small solar panel?