I'm having issues getting a preview images on the UI's Scan page.
My current setup is an OpenScan Mini with Rpi Camera v2.
The current software version is 2022-01-05-10.56 (the latest at the time of this writing)
All the hardware setup is correct and the configuration for the camera is also fine.
The setting "Preview On/Off" is currently set to "On" in the settings and my expectation is that, once the scan routine is running, that the preview image would periodically be automatically refreshed with the latest picture taken by the hardware.
However, my experience is that the preview is only updated every time I refresh the page.
I have tried clearing the browser cache but it has not produced different results.
I have restarted the hardware but the problem persists.
I have not attempted any Node-Red changes to remedy the situation because I am really out of my depth when it comes to that particular spaghetti.
Is there an expectation that anyone making use of this project would have to learn (or know) what Node-Red is and how to leverage it to make full use of the hardware?
Aside from that bug, I also have a feature request....
I was surprised to see that there is no button that could be used to get the preview updated "on demand" for initial testing and calibration purposes. (to check the lights and position of the model)
It seems to me that the only way to get a preview image is by starting the scan program whilst having "Preview On/Off" set to "On" and that to me is very poor user experience.
I have guys experienced the same problem with this latest software update?
I need to do more testing on this but I believe I may have found what could be causing the problem, tough I would not know how to fix it if that is the case.
I have a WIFI extender in my home.
It works by creating a new WIFI network and all devices that connect to that said WIFI use the extender as a bridge to be able to reach the main WIFI router.
To accomplish this, the devices connect to the WIFI extender have the MAC address masked by a new MAC address.
It basically means that a computer is seen as one device when connected directly to the main router and as a completely different one when connected through the WIFI extender.
When the computer that I use to control the Rpi is in the same WIFI as the Rpi itself, I can see the previews without much issue.
However, if the any of those is connected to the network via the WIFI extender, then preview stop work.
It is a bit weird that something like this is happening
If the software conforms to using conventional TCP/IP/HTTP protocols, the underlying structure of the network should not matter.
However, because there is an actual difference when devices are connected to different SIDs, it seems that it may be using some other fancy non-conventional method of communication that is breaking this feature.
I need to do more testing to confirm this is indeed the case.
Same here, preview does often not work.