ESP32 Camera Buffer Space / API disconnects

diplix · April 8, 2023, 7:11pm

actually there is a solution described here:

esp32_camera not working with 10/20MHZ, only 8MHZ

opened 12:40PM - 17 Feb 23 UTC

closed 05:53PM - 27 Nov 23 UTC

### The problem Hello all, First of all: I'm not sure if this is a bug or a …feature request, but since the software generates malfunctions because of the default clock setting, I classified it as a bug, I hope that's right. it's about the esp32_camera class, with the ESP32-CAM-MB board it doesn't work, it has an extremely bad performance. After some research I found a GiHub post where users have found a solution, it is a hardware problem where probably interferences are generated that occur at a clock frequency above 10MHZ. One user added a ground plane with aluminum foil, and another user reduced the clock frequency to 8MHZ in Arduino Studio, eliminating the interference. This is the post: https://github.com/espressif/arduino-esp32/issues/4655#issuecomment-1374509367 I have been able to reconstruct this using the Esp32CameraWebserver example in the Arduino Studio as well, at 10MHZ and 20MHZ the camera is virtually useless, once you reduce the clock frequency to 8MHZ the board works flawlessly. The problem is that ESPHome only accepts 10 MHZ and 20 MHZ in the esp32_camera class, at 8 MHZ this error message appears: esp32_camera: [source /config/esphome/esp-cam.yaml:35] name: espcam external_clock: pin: GPIO0 Unknown value '8000000.0', did you mean '20000000.0', '10000000.0'?. frequency: 8 MHZ My suggestion for this is to allow the clock frequency 8 MHZ as a valid value. I hope I could help with this ### Which version of ESPHome has the issue? 2023.2.1 ### What type of installation are you using? Home Assistant Add-on ### Which version of Home Assistant has the issue? 2023.2.5 ### What platform are you using? ESP32 ### Board esp32cam ### Component causing the issue esp32_camera ### Example YAML snippet _No response_ ### Anything in the logs that might be useful for us? ```txt esp32_camera: [source /config/esphome/esp-cam.yaml:35] name: espcam external_clock: pin: GPIO0 Unknown value '8000000.0', did you mean '20000000.0', '10000000.0'?. frequency: 8 MHZ ``` ### Additional information 8 MHZ Clock suggestion https://github.com/espressif/arduino-esp32/issues/4655#issuecomment-1374509367 Alufoil-hack: https://www.reddit.com/r/esp32/comments/r9g5jc/fixing_ymmv_the_poor_frame_rate_on_the_esp32cam/

in a nutshell: clock frequencies above 8 MHz create interferences that lead to a range of problems. setting it to 8 MHz solved all my connectivity problems i had with my esp32 cams.
there needed to be some esphome code changes to be made (already merged), since only clock speeds between 10 and 20 were allowed. i don’t know if the patch is included in the latest esphome release, i patched it manually, and like i said, my esp32 cams work quite reliably now with a camera clock speed of 8 MHz.