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by JovianPyx
Thu Aug 27, 2020 3:50 pm
Forum: Troubleshooting
Topic: Password stops working next day - fresh install
Replies: 14
Views: 376

Re: Password stops working next day - fresh install

This is a good one. Some questions: Do you have an image of Buster lite locally stored? If so, is it current? If local, have you checked sha-sum? or re-download? Any applications installed beyond the contents of Buster lite? I'm guessing toward some weird clock related thing. Is the failure precisel...
by JovianPyx
Thu Aug 06, 2020 3:24 pm
Forum: Troubleshooting
Topic: I can't connect to a hidden network WiFi.
Replies: 7
Views: 332

Re: I can't connect to a hidden network WiFi.

I had the same problem while trying to configure a pi-zero-w as a porch pirate camera. I have never been able to get a connection with disabled SSID broadcast. So I just now tried both of the suggested fixes above and neither worked for me. I am in the USA if that might matter. In a discussion elsew...
by JovianPyx
Thu Aug 06, 2020 3:05 pm
Forum: Camera board
Topic: Max weight for lenses
Replies: 6
Views: 327

Re: Max weight for lenses

I was also concerned about lens weight as I have a collection of Contax lenses from the film days. These include a 135 mm and a doubler lens. I use the setup to do astrophotography, so the camera is mounted on a german equatorial mount. Looking at the camera board, there are just two small screws th...
by JovianPyx
Sat Aug 01, 2020 8:28 pm
Forum: Advanced users
Topic: Examples/advice of running linux "live" from initramfs
Replies: 7
Views: 466

Re: Examples/advice of running linux "live" from initramfs

+1 for tinycore - specifically piCore. I've been using piCore for a pi zero-w with a camera that stays on 24x7. It supports lighttpd (light weight web server) so I can see the camera (pointed at the front porch) image over wifi. piCore also supports wiringPi. My application uses about 250 megabytes ...
by JovianPyx
Fri Jul 24, 2020 5:42 pm
Forum: General discussion
Topic: rosegarden MIDI app needs RT kernel?
Replies: 3
Views: 428

Re: rosegarden MIDI app needs RT kernel?

I've had a day or two to use Rosegarden running under Raspbian to make practice loops on a Pi4B 8G, ondemand overclock to 2000 MHz, USB HDD root filesystem. Perhaps I'm not that exacting about precise tempo settings, but I didn't experience anything I would call off or wrong. The beats I hear sound ...
by JovianPyx
Wed Jul 22, 2020 6:31 pm
Forum: General discussion
Topic: rosegarden MIDI app needs RT kernel?
Replies: 3
Views: 428

Re: rosegarden MIDI app needs RT kernel?

Same question about an RT kernel or other solution to the low resolution timer problem. I needed a way to make sequences for practicing physical instruments. A simple percussion track and a bass track over which I can play/practice stringed instruments. Rosegarden works, but I see the warning and ha...
by JovianPyx
Wed Jul 22, 2020 3:02 pm
Forum: Advanced users
Topic: Is there a gcc-arm-none-eabi package available?
Replies: 5
Views: 8887

Re: Is there a gcc-arm-none-eabi package available?

Thank you, that works, I just installed it. I do STM32 work and I find it easier to use a plain text editor and a command line compiler rather than IDEs like Eclipse that (for me) obfuscate by hiding it's functions and properties.
by JovianPyx
Tue Jul 21, 2020 2:52 pm
Forum: General discussion
Topic: CPU1: fail to come online
Replies: 40
Views: 3425

Re: CPU1: fail to come online

I too have seen the missing CPU1. After a reboot, all 4 were there. I just rebooted again and all 4 are there. Being low power systems, I leave them on 24/7 so this is inconvenient, but not serious.

Thanks for the thread, at least I know the pi hardware is fine.
by JovianPyx
Sat Jul 18, 2020 5:13 pm
Forum: Camera board
Topic: IMX219 10s photo takes 100s to finish
Replies: 4
Views: 250

Re: IMX219 10s photo takes 100s to finish

I too needed information along these lines. I have to say that posting to "please use the search" is tantamount to the rudeness of "RTFM" and I always thought that this was supposed to be a friendly place. Oh and you can use the search to find my post where that happened to me as well. I agree fully...
by JovianPyx
Thu Jul 16, 2020 6:00 pm
Forum: Camera board
Topic: V2 Camera Dead Time Between Timelapse Frames
Replies: 3
Views: 209

Re: V2 Camera Dead Time Between Timelapse Frames

Thank you, the clues were AGC and AWB Through research here and then a lot of experimentation, I found this to work quite well as a starting point: raspiyuv -o image%06d.rgb -n -ss 1000000 -t 60000 -h 2464 -w 3280 -rgb -ex off -tl 0 -awb off -bm -md 1 -ag 12.0 -awbg 1.3,1.3 This executes in 61.47 se...
by JovianPyx
Thu Jul 16, 2020 2:45 pm
Forum: Camera board
Topic: V2 Camera Dead Time Between Timelapse Frames
Replies: 3
Views: 209

V2 Camera Dead Time Between Timelapse Frames

I'm using a V2 camera for night sky work. It is connected to a pi4b 4G RAM with a USB HDD as root filesystem. It is a pi dedicated to the camera. I am using raspiyuv to capture RGB data with this command: raspiyuv -n -ss 1000000 -t 40000 -ISO 800 -h 2464 -w 3280 -rgb -tl 0 -o "image%06d.rgb" This wo...
by JovianPyx
Wed Jun 24, 2020 2:42 pm
Forum: Beginners
Topic: Easiest way to generate graph from temperature data
Replies: 14
Views: 628

Re: Easiest way to generate graph from temperature data

I use gnuplot to generate a png file from the data which is then available to apache2. Since the webpage auto-refreshes, the graph is "live" given some latency. Alternatively, I have used KO18-U translation on a puTTY terminal which has two half block characters that I use as huge pixels. I wrote a ...
by JovianPyx
Sun Jun 21, 2020 2:37 pm
Forum: General discussion
Topic: Memory split on Pi 4
Replies: 3
Views: 318

Re: Memory split on Pi 4

by JovianPyx
Fri Jun 19, 2020 12:46 am
Forum: Camera board
Topic: HQ Camera Exposure Longer Than 200 Sec
Replies: 5
Views: 482

Re: HQ Camera Exposure Longer Than 200 Sec

Thank you, Deep Sky Stacker looks great!
by JovianPyx
Thu Jun 18, 2020 10:02 pm
Forum: Camera board
Topic: HQ Camera Exposure Longer Than 200 Sec
Replies: 5
Views: 482

Re: HQ Camera Exposure Longer Than 200 Sec

Its actually a function of the sensor - a limit on the timings you can set it to. These timings set the values for the rolling system system, i.e. how long a line is exposed for. I think the upper limit is about 230s before the registers for timing parameters reach the maximum possible. So, no infi...
by JovianPyx
Thu Jun 18, 2020 6:13 pm
Forum: Camera board
Topic: HQ Camera Exposure Longer Than 200 Sec
Replies: 5
Views: 482

HQ Camera Exposure Longer Than 200 Sec

I've just received my HQ camera which I've purchased to use mainly for astrophotography. Reading through posts here, I can't find a way to use the camera in bulb mode, that is, where the shutter is opened manually and it remains open until it is manually closed. Such as for photographing a meteor sh...
by JovianPyx
Mon Jun 08, 2020 4:42 pm
Forum: Troubleshooting
Topic: Monitoring Temp of Raspbery PI
Replies: 1
Views: 139

Re: Monitoring Temp of Raspbery PI

To monitor the temperature (or anything else for that matter) you need to make some kind of connection. It doesn't have to be SSH or VNC, though they would allow temperature monitoring. Another way is to run a web server on the pi. A small light-weight one is called lighttpd. Alternatively, you can ...
by JovianPyx
Tue Jun 02, 2020 5:36 pm
Forum: Camera board
Topic: HQ Camera and Astrophotography
Replies: 12
Views: 2548

Re: HQ Camera and Astrophotography

Thank you very much again, stuff on order now. Should be a blast playing with this and one of my Pi boards (also getting 2 pi4b with 8G).
by JovianPyx
Tue Jun 02, 2020 4:30 pm
Forum: Camera board
Topic: HQ Camera and Astrophotography
Replies: 12
Views: 2548

Re: HQ Camera and Astrophotography

Thank you very much. I looked at all three and they look very different. I can't tell if they all would put the camera at the same point in the light path. Is there a difference between these that is important? My location being USA, I'm most interested in the one at the Amazon site, so all other th...
by JovianPyx
Tue Jun 02, 2020 3:37 pm
Forum: Camera board
Topic: HQ Camera and Astrophotography
Replies: 12
Views: 2548

HQ Camera and Astrophotography

I would love to get an HQ camera to try astrophotography, but I can't find enough information. I have two telescopes, Celestron C-90 and C-8. I have a clock drive on an equatorial mount. I've used both with a standard film camera at prime focus. I have the T-ring for a Yashika camera body. While the...
by JovianPyx
Sun May 31, 2020 3:36 am
Forum: Advanced users
Topic: Raspberry Pi Zero W boot with NFS root filesystem
Replies: 104
Views: 3969

Re: Raspberry Pi Zero W boot with NFS root filesystem

Good suggestion which is in my case easy to implement (not updating the kernel). I use a script called 'update' to do updates. In the new version of this, I commented out the apt full-upgrade I agree that not much will happen by not upgrading the kernel. Unless there are problems that can be correct...
by JovianPyx
Sun May 31, 2020 1:13 am
Forum: Advanced users
Topic: Raspberry Pi Zero W boot with NFS root filesystem
Replies: 104
Views: 3969

Re: Raspberry Pi Zero W boot with NFS root filesystem

This is solved for this project. I've implemented a small RAMdisk and use rc.local to copy files that will be used during the applications actions. This works quite well. Once lighttpd loads, it remains RAM resident so during operation, the only thing WiFi is used for is sending the camera image to ...
by JovianPyx
Sun May 17, 2020 3:50 pm
Forum: Networking and servers
Topic: P2P Pi 2 Pi
Replies: 6
Views: 325

Re: P2P Pi 2 Pi

The best way to isolate a LAN is to use wires, not radio. If your Raspberry Pi boards are the type with an ethernet connector, get a "ethernet crossover cable" and connect the two boards together. There is no hub required. Assign each Pi it's own static IP address. Resolve name to IP address transla...
by JovianPyx
Sat May 16, 2020 9:22 pm
Forum: Advanced users
Topic: Raspberry Pi Zero W boot with NFS root filesystem
Replies: 104
Views: 3969

Re: Raspberry Pi Zero W boot with NFS root filesystem

As an addendum, I'll add that using WiFi as a medium for NFS root file system is not at all optimal. Just connecting to mount the root filesystem often fails with a kernel panic because it took too long. When it connects, it can take 4.5 minutes to finish booting. I found this to be less problematic...
by JovianPyx
Wed Apr 29, 2020 4:56 pm
Forum: Troubleshooting
Topic: Pi4B Raspbian Buster Ignores arm_freq_min in config.txt
Replies: 2
Views: 236

Re: Pi4B Raspbian Buster Ignores arm_freq_min in config.txt

Again a bit more. After scouring the internet to understand why the two systems have different scaling drivers, I found that the driver is not a loadable module. It is compiled into the kernel. Further, I was able to find the strings 'cpufreq-dt' in the server's kernel8 file and 'BCM2835 CPUFreq' in...

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