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    M5stack timer camera error: cam hal: ev-eof-ovf

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    • V
      vijaypawar
      last edited by

      Subject: "CAM HAL: EV-EOF-OVF Error – OV3660 Freezing After 5-10 Seconds"

      Hi everyone,

      I'm using an M5Stack camera with the OV3660 sensor, and I'm experiencing an issue where the camera freezes after 5-10 seconds. The serial monitor repeatedly shows:

      CAM HAL: EV-EOF-OVF

      After resetting, the camera works for a few seconds but then freezes again with the same error.

      My Setup:

      Camera Module: M5Stack OV3660

      Power Supply: Stable 5V, 2.1A

      Firmware: camera web server

      Frame Size: UXGA (1600x1200), SVGA (800x600), QVGA (320x240)

      PSRAM: Enabled

      fb_count: 1 / 2

      Troubleshooting I've Tried:

      ✔ Reduced frame size (tried QVGA, SVGA)
      ✔ Set fb_location = CAMERA_FB_IN_PSRAM
      ✔ Adjusted jpeg_quality (tried 10, 12, 15)
      ✔ Increased fb_count to 2

      Despite these changes, the CAM HAL: EV-EOF-OVF error still occurs, leading to camera freezes.

      Could this be a buffer overflow, PSRAM issue, or something else? Any help would be greatly appreciated!

      Thanks in advance.

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