When I use the OV7725 camera and set the frame size to QVGA in auto-exposure mode, the maximum exposure time is only 6576. However, when I set it to VGA mode, the maximum exposure time can reach 16529. I’m not sure if this is due to my configuration issue or a bug.
Hi, it’s because the frame readout time changes. The max exposure time is limited by the frame readout speed which increases in QVGA mode (faster speed means less time for exposure).
Thank you. How can I set the maximum exposure time in QVGA auto-exposure mode? Can it be modified through register parameters? I want to increase it now.
Hi, you can turn off auto exposure and manually set the exposure time via sensor.set_auto_exposure(False, exposure_us=xxxxxxxxxx).
Please see the API: sensor — camera sensor — MicroPython 1.24 documentation