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I have got an issue with the same setup. I am using a CM4 IO board with two Pi Camera v2.1 devices. Both of them were attached to the board and I executed the dual-camera option: sudo wget -O /boot/dt-blob.bin I can see one of the cameras (attached to the CAM1 port) but I cannot use the CAM0 camera....


I had something similar when trying to use the generic camera commands through ssh during the setup process. I could tell that something was taking control of the camera on boot. Turned out to be the on board web server. Try opening a browser and typing in: XXX.XXX.XXX.XXX:5000 where XXX... is the private IP of the robot and it is on the same network as the ...


I use raspistill -t 10 -v -md 3 -bm -ex off -ag 1 -ISO 800 -st -ss 2000000 -a 1052 And get a 2 second exposure. I have found that raspistill takes 5 exposures before it takes the exposure that returns an image. This means that call will take 5-6 times the shutter speed. In this case 10 seconds for the 5 exposures you don't see and then 2 seconds for the ...


I send a stream of JPEG files using zmq which is a kind of wrapper over sockets that handles most of the ugly for you. It's not a standard protocol though. from picamera import PiCamera import io import zmq context = zmq.Context() socket = context.socket(zmq.PUB) # CONFLATE=1 disables the send queue so it will drop frames instead of creating latency. socket....


This appears to be a bug in the version of libraspberrypi0 that was installed in the upgrade. Manually downgrading to libraspberrypi0_1.20210831-1_armhf.deb fixed it.


For the complete workflow (decode image, send result elsewhere) you will need to invest some programming time, but the zbar-tools suite offers tools to read a camera stream and decode various codes found on the images, so you can take that as a starting point.

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