It was probably just https://randomnerdtutorials.com/telegram-esp32-cam-photo-arduino/ that references https://randomnerdtutorials.com/esp32-cam-camera-pin-gpios/.

Hi Leon.
That’s probably the tutorial Steve is pointing out.
If you need further help, just let us know.
Regards,
Sara

I found what I was looking for..
ESP32-CAM-Projects-eBook-V1-1 page23
Thanks,
Leon

Hi.
There’s also a section at the end of the Book with the pinout of the board.
Unfortunately, that pinout is wrong. I found that out after getting one of those boards.
The right pinout is as follows:

define PWDN_GPIO_NUM -1
define RESET_GPIO_NUM -1
define XCLK_GPIO_NUM 32
define SIOD_GPIO_NUM 13
define SIOC_GPIO_NUM 12
define Y9_GPIO_NUM 39
define Y8_GPIO_NUM 36
define Y7_GPIO_NUM 23
define Y6_GPIO_NUM 18
define Y5_GPIO_NUM 15
define Y4_GPIO_NUM 4
define Y3_GPIO_NUM 14
define Y2_GPIO_NUM 5
define VSYNC_GPIO_NUM 27
define HREF_GPIO_NUM 25
define PCLK_GPIO_NUM 19

That will be fixed in the next eBook update.
We wrote a review about that board in the following link (you might find it useful):

ESP32 TTGO T-Camera with PIR Sensor and OLED Display Board – Review and Pinout

Regards,
Sara

Thank you for pointing that out.
Regards,
Leon

Great!