No picture visible on PRUSA Connect... WHY?

[HydroLuz]

Hello everybody,

I have carefully followed the instructions for the Freenove ESP32-WROVER and succesfully connected it to PRUSA Connect. Snapshots are constantly being send to PRUSA Connect, but I cannot see anything..

Does anyone know why?

I have tested the camera with the Arduino sketch provided by Freenove and it works. However, with on PRUSA Connect I only see a black image...

Any solutions? I would be very grateful :)

[johnyHV]

Hello @HydroLuz . Do you still have the same problem?

[HydroLuz]

Hello @HydroLuz . Do you still have the same problem?

@johnyHV unfortunately I do... I have tried out the arduino sketch aswell, however I also just see black images even though it appears to send pictures to Prusa Connect..
Now I have tested the arduino sketch provided by Freenove again and it shows me footage (see picture). I really understand what is the problem...

[HydroLuz]

Hello @HydroLuz . Do you still have the same problem?

@johnyHV unfortunately I do... I have tried out the arduino sketch aswell, however I also just see black images even though it appears to send pictures to Prusa Connect.. Now I have tested the arduino sketch provided by Freenove again and it shows me footage (see picture). I really understand what is the problem...

Here you can see that the camera is registered with Prusa Connect:

[HydroLuz]

Hello @HydroLuz . Do you still have the same problem?

Here you can see the Wifi connection status:

and here the System status:

[johnyHV]

@HydroLuz Strange. Please, can you send me board picture ? From both side. Thanks

[HydroLuz]

@HydroLuz Strange. Please, can you send me board picture ? From both side. Thanks

[nhuhoai]

I have the same issue: I can compile and upload into my microchip. Everything works except the camera: black image.

I uploaded the ESP32 Camera Web Server from the official example of the board and the camera is working. I had checked the pinout but it's identical and check the log in verbose mode but everything seems ok.

After some tests, I change the camera settings in the prusa esp32 cam web server:

1. Set the brightness to high
   
2. Enable the second level automatic exposure control in advanced settings
   

And voilà, I have a picture now. Hope you have the same issue and it can help you.

[HydroLuz]

I have the same issue: I can compile and upload into my microchip. Everything works except the camera: black image.

I uploaded the ESP32 Camera Web Server from the official example of the board and the camera is working. I had checked the pinout but it's identical and check the log in verbose mode but everything seems ok.

After some tests, I change the camera settings in the prusa esp32 cam web server:

1. Set the brightness to high
   
2. Enable the second level automatic exposure control in advanced settings
   

And voilà, I have a picture now. Hope you have the same issue and it can help you.

HEYYYYY! You are right! IT WORKED! Thank you very much!
Interersting fact: After I made the changes you recommended and I finally got a picture I changed the resolution and image quality and it turned black again. I was furious as resetting did not bring the picture back. However, after I disabled the second level automatic exposure control in advanced settings the picture returned hahahahahahahhahaha.

Thanky again my friend :)

[nhuhoai]

You're welcome. But I have the same issue, after while, I got the black screen again, just edit some camera settings the picture returned. But, we can make it. It seems a software problem with the automatic settings.

[HydroLuz]

You're welcome. But I have the same issue, after while, I got the black screen again, just edit some camera settings the picture returned. But, we can make it. It seems a software problem with the automatic settings.

Unfortunately, I experienced the same. After a while I got the black screen again aswell. Not sure why...

[nhuhoai]

I have the "black picture" after each reboot. But this time, my camera is falling and it's face to the LEDs. It captures this picture:

Meaning the black screen is related to the camera settings on boot.

I make some tests with the UI:

1. Adding onload script on the picture
2. Analyze the picture (light level), if too dark, then wait for the camera settings (from /json_input) and get the contrast value (A)
3. Force update contrast setting with a different value (with /set_int?contrast=X)
4. Force update contrast setting with the current value A (with /set_int?contrast=A)
5. Reload image adding a timestamp param in the URL

It works when I load the web interface but I need to go on the web interface to fix the problem. The fix should be in the microchip code.

[HydroLuz]

I have the "black picture" after each reboot. But this time, my camera is falling and it's face to the LEDs. It captures this picture:

Meaning the black screen is related to the camera settings on boot.

I make some tests with the UI:

1. Adding onload script on the picture
2. Analyze the picture (light level), if too dark, then wait for the camera settings (from /json_input) and get the contrast value (A)
3. Force update contrast setting with a different value (with /set_int?contrast=X)
4. Force update contrast setting with the current value A (with /set_int?contrast=A)
5. Reload image adding a timestamp param in the URL

It works when I load the web interface but I need to go on the web interface to fix the problem. The fix should be in the microchip code.

Does it work constantly or does it go back to black again after a while?
Btw. do you also use the Freenove ESP32 Wrover?

[nhuhoai]

Does it work constantly or does it go back to black again after a while? Btw. do you also use the Freenove ESP32 Wrover?

After manual fix, it works until the next reboot (the max time use is about 4 hours).

About the microchip, I use an ESP32-S3-CAM.

[HydroLuz]

Super weird! After days with a black image suddenly we got a "clear" image again without me changing anything hahahahahaha... I don´t really get it xD
However, it went black when I started the next print :(