This page lists possible blink codes of the red LED located on the ESP32-CAM board, their meaning and possible solutions.

The effective error codes can be found here.

TODO!!!

Error

Those errors make the normal operation of the device impossible. Most likely they are caused by a hardware issue!

0x00000001 PSRAM bad

Your device most likely has no PSRAM at all or it is too small (needs to have at least 4 MBytes)! See Hardware Compatibility.

Usually the log shows something like this:

psram: PSRAM ID read error: 0xffffffff
cpu_start: Failed to init external RAM!

Status

Those Errors can be caused by an error during initialization. It is possible that the error has no impact at all or that a reboot solves it.

0x00000100 Cam Framebuffer bad

The firmware was unable to initialize the Camera Framebuffer. The firmware will continue to work, but other consequential error might arise. A reboot of the device might help.

0x00000200 NTP failed

The firmware failed to get the world time from an NTP server. The firmware will continue to work, but has a wrong time.