Board detects only 1 camera

StereoPi hardware discussion
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season2episode3
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Joined: Fri Dec 18, 2020 7:17 am

Board detects only 1 camera

Post by season2episode3 »

Hey StereoPi community :)

I recently stopped being able to capture stereo video from my stereopi, only one of the two cameras work. This issue persists after swapping camera positions as well as after switching from V2 cameras to V1 cameras.

Code: Select all

$ sudo vcgencmd get_camera
supported=2 detected=1

$ raspistill -cs 0 -v 
<works correctly>

$ raspistill -cs 1 -v
mmal: Could not select camera : error 3
mmal: main: Failed to create camera component
mmal: Failed to run camera app. Please check for firmware updates
Reading the rest of this forum indicates this is a hardware problem that needs a replacement board. (e.g., this thread) Can anyone from the team confirm?

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Realizator
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Re: Board detects only 1 camera

Post by Realizator »

Hi season2episode3,
Wow, it's a pity you have this trouble with your board.
Am I got you right, that after swapping cameras, you can get an image, but from the single CSI connector only?
Please also look into the non-working connector, as sometimes a small dust or piece of plastic causing this issue.

I wrote you an email. Please answer :-)
Eugene a.k.a. Realizator

stnz
Posts: 3
Joined: Wed Dec 23, 2020 11:37 am

Re: Board detects only 1 camera

Post by stnz »

Hi community,

I just experienced the very same problem. While first dual camera has been working, it now cannot detect the second camera anymore after a few days. I also swapped cameras (and the ribbon cables), but still only the first camera slot is working. Reflashed RaspberryOS and copied the blob file, but still, the problem persists. What else can I do?

Thanks for your help!

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Realizator
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Re: Board detects only 1 camera

Post by Realizator »

Hello Stnz,
Our experience says, that in 97% cases this problem means a physical connection issue (i.e. camera ribbon cable issue, or a "Sunny" connector on the camera PCN).
Could you please tell us:
1. Which camera model you are using?
2. What is the result of this command:

Code: Select all

sudo vcgencmd get_camera
Eugene a.k.a. Realizator

stnz
Posts: 3
Joined: Wed Dec 23, 2020 11:37 am

Re: Board detects only 1 camera

Post by stnz »

Hi Realizator,

thanks a lot for the reply! I first checked the cameras and cables. I swapped the ports so that I can sort that out. No matter which cable/camera is on port 0 and on port 1 I get a picture when running

Code: Select all

raspivid -cs 0
and I get error 3 when running

Code: Select all

raspivid -cs 1
.
As to your questions:
1. I am using two identical V2.1 NOIR cameras
2. The result is

Code: Select all

supported=2 detected=1
(no matter which cam is on which port).
Thank you very much for your support!

stnz
Posts: 3
Joined: Wed Dec 23, 2020 11:37 am

Re: Board detects only 1 camera

Post by stnz »

I now tried to use an older version of Raspbian, to see if maybe the problem comes from a recent change in software / kernel, but the problem persists. Do you have any other advice on what I could do? Thank you!

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Realizator
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Re: Board detects only 1 camera

Post by Realizator »

Hi stnz,
Sorry for my late reply.
Could you please write me an email to my nickname @gmail.com? I think that the board replacement is a good solution here.
Eugene a.k.a. Realizator

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