Go to advanced search

by Arp
Mon May 28, 2018 6:34 pm
Forum: Automation, sensing and robotics
Topic: Trouble sending code to roller shutter on 433 MHz
Replies: 0
Views: 236

Trouble sending code to roller shutter on 433 MHz

Hey, I recently moved, and there are some nice wireless controlled roller shutters built into the windows. The remote runs on 433 MHz. Now I want to control them using the Pi. I bought a receive and transmit unit. I recorded what the controller sends out using a dvbt2 dongle and rtl_sdr, using rtl_f...
by Arp
Tue Jan 12, 2016 10:46 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO gives 1 and 0 without wires touching
Replies: 4
Views: 864

Re: GPIO gives 1 and 0 without wires touching

Awesome, Thank you!
by Arp
Tue Jan 12, 2016 10:03 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO gives 1 and 0 without wires touching
Replies: 4
Views: 864

GPIO gives 1 and 0 without wires touching

Hi, I am trying to add a switch to my raspberry pi 2 B. I have the following code to just test if it works: import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BOARD) GPIO.setup(33,GPIO.IN) while True: print GPIO.input(33) time.sleep(0.5) The problem is, as soon as I attach to wires to pin 33 and ...
by Arp
Mon Jan 11, 2016 11:42 pm
Forum: Camera board
Topic: Tips for Nightvision Set wanted
Replies: 4
Views: 1331

Re: Tips for Nightvision Set wanted

thanks for the effort! I assembled everything, but since I dont have a hardware switch yet, I quickly tried my own script. I tried two different approaches for a proper shutdown, which at this moment is the only problem I have. First I wanted to shutdown the script when it recieves a key from the ke...
by Arp
Thu Jan 07, 2016 8:38 pm
Forum: Camera board
Topic: Tips for Nightvision Set wanted
Replies: 4
Views: 1331

Tips for Nightvision Set wanted

Hi, I have a problem. A sucky one. Epileptic seizures that apparently only hit me at night. Since I live alone, nobody actually saw this happening, so I want to install a Pi2 with the NoIR Camera. It would be mounted 1 or 2 meters from my bed, so that would be enough for IR illumination range. I pla...
by Arp
Sun Mar 29, 2015 1:39 pm
Forum: Beginners
Topic: Keep SD card from corrupting by mounting read only?
Replies: 0
Views: 337

Keep SD card from corrupting by mounting read only?

Hi, I want to make a gpslogger for my car, and since I already have a GPS USB dongle, I want to use the raspberry pi 2 for this. The problem is power ... As soon as the car is turned off, the power to the pi is gone and it immediatly turns off. Now I know that this increases the chance for a sd card...
by Arp
Sun Jan 19, 2014 10:54 pm
Forum: Troubleshooting
Topic: Getting Wireless RTL8188CUS to run
Replies: 3
Views: 2026

Re: Getting Wireless RTL8188CUS to run

It would appear then that you need to patch the source to include the ID for your device and compile and install the updated driver. Whether this is the problem with the ARCH Linux driver I cannot be certain but most likely it is. Thx. And how would I patch this? I've never done anything like this....
by Arp
Sun Jan 19, 2014 10:07 pm
Forum: Troubleshooting
Topic: Getting Wireless RTL8188CUS to run
Replies: 3
Views: 2026

Getting Wireless RTL8188CUS to run

Hello, I am not very versed in driver compiling/installing. Most of the time everything worked out of the box :) I installed arch linux, and I bought a wireless adapter from ISY. According to lsusb the adapter is at least recognized. Bus 001 Device 004: ID 050d:11f2 Belkin Components ISY Wireless Mi...
by Arp
Wed Jan 15, 2014 1:58 pm
Forum: Camera board
Topic: Time Lapse
Replies: 3
Views: 878

Re: Time Lapse

I use ffmpeg to create a video out of single frames: ffmpeg -r 30 -i %05d.jpg -c:v libx264 -crf 20 -r 30 video.mp4 the first -r 30 defines the framerate of the video, %05d.jpg uses all images which are named like 00001.jpg, 00002.jpg and so on, -c:v sets the encoding codec, -crf 20 defines the quali...
by Arp
Fri Jan 10, 2014 4:01 pm
Forum: Camera board
Topic: Saving Timelapse directly on remote server?
Replies: 9
Views: 3124

Re: Saving Timelapse directly on remote server?

Hi, Yes, my script looked very similar, but there was a problem. I wanted to copy to folder, which was mounted as a webdav folder do my owncloud server. I was able to connect, but every cp command from within the python script would create a 0 byte file, and the actual copying of the data was done w...
by Arp
Fri Jan 10, 2014 9:50 am
Forum: Camera board
Topic: Saving Timelapse directly on remote server?
Replies: 9
Views: 3124

Re: Saving Timelapse directly on remote server?

Sorry. I meant raspistill, of course. @waveform80 Yes, full resolution. ~2.3 MB per image. But I will do this from my office window (has a nice view :)) and we have a decent internet connection, ranging from 500 kb/s to >2 mb/s, depending on the overall traffic. So, uploading a full res image to my ...
by Arp
Thu Jan 09, 2014 6:37 pm
Forum: Camera board
Topic: Saving Timelapse directly on remote server?
Replies: 9
Views: 3124

Saving Timelapse directly on remote server?

Hi, I plan to let raspivid run over the weekend. I want it to directly save the images onto my owncloud server. I would create a folder and mount it as webdav folder so everything goes automatically into the cloud. Now, I dont know how fast the internet connection will be. Could take a couple of sec...
by Arp
Wed Jan 08, 2014 11:12 pm
Forum: Beginners
Topic: Autostart script in Arch Linux?
Replies: 1
Views: 670

Re: Autostart script in Arch Linux?

Maybe its something with sh file...

I changed that to run a python script and this does work!
by Arp
Wed Jan 08, 2014 10:43 pm
Forum: Beginners
Topic: Autostart script in Arch Linux?
Replies: 1
Views: 670

Autostart script in Arch Linux?

Hello, I want to enable the Pi to start the camera at boot. I am using Arch Linux. So, the sh is actually very simple /root/record.sh /opt/vc/bin/raspivid -w 1920 -h 1080 -hf -vf -fps 30 -t 30000 -o test.h264 I googled around and found the suggestion to put a service into /etc/systemd/system/. So I ...
by Arp
Wed Jan 08, 2014 9:52 pm
Forum: Camera board
Topic: fixed exposure time independent of framerate?
Replies: 3
Views: 891

Re: fixed exposure time independent of framerate?

Hi, yes, that helps. I compared 30 fps to 30fps with -ss 33333. looks the same. Only using 20 fps looks the same as 30 fps, except that it has fewer frames of course. But using -fps 20 and -ss 50000 also runs on 20 fps but the image is a bit brighter, as it should be, because otherwise it would wast...
by Arp
Wed Jan 08, 2014 9:23 pm
Forum: Camera board
Topic: Rational (fraction) as shutter speed value
Replies: 10
Views: 2830

Re: Rational (fraction) as shutter speed value

Is this patch already in the new version? Or will it be implemented? I find it very usefull.

I just played around with raspivid and -ss 100000/30 yields a different result then -ss 33333... I guess it only takes the 100000 part, because the frames are much longer exposed.
by Arp
Wed Jan 08, 2014 12:06 pm
Forum: Camera board
Topic: fixed exposure time independent of framerate?
Replies: 3
Views: 891

fixed exposure time independent of framerate?

Hello, yesterday I played around with raspivid. It was in low light room in the evening. Without any special mode I saw a video at 30 fps with rather high noise. Then I lowered the fps, but the image looked the same, just with lower fps. I assume the exposure time is not changed when the fps is chan...
by Arp
Thu Sep 19, 2013 10:28 am
Forum: Camera board
Topic: raspivid framerate not constant?
Replies: 4
Views: 3363

Re: raspivid framerate not constant?

As far as I remember, I used -fps 30.

But you got a point... a 30 fps video played back at 25 fps would make a 5 minute video 6 minutes long.

When Im home, I will check if ffmpeg, when copying the video stream to a new container, screws up the framerate...
by Arp
Thu Sep 19, 2013 10:18 am
Forum: Camera board
Topic: raspivid framerate not constant?
Replies: 4
Views: 3363

raspivid framerate not constant?

Hello, I did some further experiments with my camera, and I apologize if this was already asked. First of all, if I watch the produced videos with VLC, it does not show timecodes in it. The total length is given as 00:00. I found, that if I copy the videostream with ffmpeg into a new container, I ge...
by Arp
Thu Sep 19, 2013 8:54 am
Forum: Camera board
Topic: USB cameras (webcams) on Raspberry Pi
Replies: 73
Views: 38206

Re: Consider a USB camera as an alternative

Funny... I started with a MS lifecam, but changed to the raspberry camera because the lifecam could not do what I wanted. I primarly use it to record video. Full HD, h264. Using ffmpeg on the raspberry, I never got more than 5 frames per second. The Raspberry Cam has no problem recording at 30 fps. ...
by Arp
Sat Sep 14, 2013 10:51 pm
Forum: Camera board
Topic: vertical artifacts in low light condition video ...
Replies: 19
Views: 5087

Re: vertical artifacts in low light condition video ...

Maybe controlling the level of the denoise filter would also help. Sometimes a little bit of noise is better then the stuff you see after a denoise filter ran over it.
by Arp
Sat Sep 14, 2013 10:47 pm
Forum: Camera board
Topic: recording length if powered down while recording
Replies: 2
Views: 766

recording length if powered down while recording

Hello, Today I got my camera board and started testing immediately. My intention is to use it as a dashcam in my car. The plan is rather simple. On starting the car, the raspberry powers up and starts recording. Turning the car off will immediately shut down the raspberry. And here's the problem. I ...
by Arp
Thu Sep 12, 2013 1:08 pm
Forum: Camera board
Topic: Binning for full FOV video
Replies: 21
Views: 10372

Re: Binning for full FOV video

Sorry for a possibly dumb question, but for regular CCDs, is binning not done by the sensor itself? Or at the very least, by the electronics which read out the CCD, prior to sending the image data.
by Arp
Thu Sep 12, 2013 1:05 pm
Forum: Camera board
Topic: How to add text-overlay with raspivid?
Replies: 31
Views: 30266

Re: How to add text-overlay with raspivid?

Me too! Although I would use this as dashcam. My current dashcam (webcam+usb-gps-dongle+laptop+ffmpeg) also had this sync problem. I solved it by having a script writing all the gps data into a line in a text file, once every second. The capturing from the webcam was done in ffmpeg, and this has an ...
by Arp
Wed Sep 11, 2013 3:01 pm
Forum: Camera board
Topic: low light performance?
Replies: 3
Views: 998

Re: low light performance?

Thanks for the replys. @RaTTus The wide angle is not a problem. My current Logitech Camera also does not have a wide lense, so if the camera module here has roughly the same field of view, thats enough for me. Regarding price... well, I already own a raspberry model B, so I just need the camera :) @...

Go to advanced search