HQ Camera CCD Temperature Sensor.

[greg-the-maker]

Hi,

I saw that the Dark Frames don't work with the HQ Camera because of missing temperature data (https://github.com/thomasjacquin/allsky/wiki/Dark-Frames-Explained) and while digging through the internet I found this and thought it might be of help?

https://forums.raspberrypi.com/viewtopic.php?t=288962

[EricClaeys]

@greg-the-maker It requires someone to write a kernel driver to get the temperature. In the meantime. If you can write some temperature (perhaps ambiant) to a file called allsky/tmp/temperature.txt, dark frames will work. That file would need to be updated as the temperature changes.

@Alex-developer, FYI

[Alex-developer]

@EricClaeys once I have the overlay stuff all done I'll take a look at the kernel driver.

[Bi7]

What is the format of the temperature.txt file?
Would it be the same date format used elsewhere and a temperature, say 20220604 70?
Or more likely in C vs F?

Thanks

[Dentonknifeworks]

I have sensors in the dome and the case and writing to a database and text file. I to would like to know what is the format for the txt file would love to try this method.

[EricClaeys]

Are you referring to allsky/tmp/temperature.txt? It' just the integer temperature in degrees C, for example: 29

[EricClaeys]

The "libcamera" development team is adding the sensor temperature to the output metadata, so we should be able to get access to it. Note it will only work with libcamera (currently only on Bullseye).

[blacc01]

Hi,

Just wanted to get some dark frames with my newly installed RPi HQ CAM, but saw that currently it will not work, as this cam does not have temperature sensor. So should i pass to take darks, or what should i do?

[EricClaeys]

@blacc01 I'd try without darks. You may not need them.
The Wiki describes how you can use darks with RPiHQ camera, but it's not particularly easy so unless you really want them I wouldn't bother.

The software team that supports the camera is making the sensor temperature available on the Bullseye operating system, so I'll incorporate them into Allsky at some point (I first need to get Bullseye).

[blacc01]

Ok thanks, than i'll do not make darks.