@0x1abin The prebuilt firmware doesn't work for me either. I get this:
[0;32mI (362) heap_init: Initializing. RAM available for dynamic allocation:[0m
[0;32mI (369) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM[0m
[0;32mI (375) heap_init: At 3FFB9E48 len 000261B8 (152 KiB): DRAM[0m
[0;32mI (381) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM[0m
[0;32mI (387) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM[0m
[0;32mI (394) heap_init: At 400907AC len 0000F854 (62 KiB): IRAM[0m
[0;32mI (400) cpu_start: Pro cpu start user code[0m
[0;32mI (194) cpu_start: Starting scheduler on PRO CPU.[0m
[0;32mI (0) cpu_start: Starting scheduler on APP CPU.[0m
[0;31mE (306) camera_demo: Camera probe failed with error 0x20001[0m
Faulty device?