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by d_older
Mon Nov 08, 2021 3:30 pm
Forum: Beginners
Topic: Issue with installation and use of the Imager
Replies: 4
Views: 229

Re: Issue with installation and use of the Imager

Hi Nav9,

If you want dependencies automatically bringing in use apt install rather than dpkg -i .

e,g.

Code: Select all

sudo apt install ./imager_1.6.2_amd64.deb
Note you need the "./" or apt will go looking at the (ubuntu) repositories.

Hope this helps

Dave
by d_older
Mon Jan 11, 2021 11:12 am
Forum: Beginners
Topic: Grabserial as HEX Dump dataloger. (Pi4 hex dump data logger)
Replies: 8
Views: 482

Re: Grabserial as HEX Dump dataloger. (Pi4 hex dump data logger)

Hi anarh6, I believe that jpnevulator does not control the port characteristics at all. You could try stty -F /dev/ttyUSB0 57600 cs5 cstopb -parenb device speed 5 bit char, 2 stop bits, no parity (see man stty for all the options) before running the jpnevulator command Hope this helps Dave
by d_older
Fri Jan 08, 2021 1:18 am
Forum: Beginners
Topic: Grabserial as HEX Dump dataloger. (Pi4 hex dump data logger)
Replies: 8
Views: 482

Re: Grabserial as HEX Dump dataloger. (Pi4 hex dump data logger)

HI anarh6, Take a look jpnevulator (apt install jpnevulator) and feed to output to "tee" e.g. jpnevulator -r -g -e 50000 -t /dev/ttyUSB0 | tee jpn_log.txt -r=read, -g=add timestamps, -e 50000 = treat > 50000 microseconds gap as separate "packets" -t= tty device and then piped to ...
by d_older
Sun Dec 27, 2020 3:11 pm
Forum: Troubleshooting
Topic: Television display pi4
Replies: 1
Views: 95

Re: Television display pi4

Hi gretired53 ,

Can you put the input that the pi is connected to into "Game" mode?

I seem to remember that was what I had to do with my old Panny to get rid of all overscan within the TV.

Hope this helps,
Dave
by d_older
Sun Dec 06, 2020 11:12 am
Forum: General discussion
Topic: apt-get taking forever for a 13 MB update
Replies: 2
Views: 225

Re: apt-get taking forever for a 13 MB update

Hi,
W. H. Heydt wrote:
Sun Dec 06, 2020 3:57 am
Third, your CAT-5e cable is only rated for 100Mb/s.

Cat 5e is specifically rated for Gigabit, and most Cat 5 is happy @ Gigabit. The "e" addition to the specification was to specify parameters not covered in the original Cat 5 to ensure Gigabit compatibility.



Dave
by d_older
Fri Oct 09, 2020 11:43 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: 1-wire Temperature Inaccuracy
Replies: 12
Views: 2796

Re: 1-wire Temperature Inaccuracy

Hi Folks, The datasheet is quite clear on the accuracy of the sensor itself:- https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf -10°C to +85°C (Note 3)±0.5°C -30°C to +100°C±1 -55°C to +125°C ±2 Note 3:See typical performance curve in Figure 1. Thermometer Error limits are 3-sigma values. Sli...
by d_older
Fri Oct 09, 2020 7:44 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: 1-wire USB interfaces
Replies: 5
Views: 1092

Re: 1-wire USB interfaces

Hi tadueck, As your device looks to be be a combined FTDI usb to serial / serial One Wire master I would suggest the following:- Start with one sensor connected. Disable the kernel 1-wire driver with "sudo raspi-config" Interfacing options - P7 1wire edit /etc/owfs.conf (with sudo) to ensu...
by d_older
Sat May 02, 2020 10:34 pm
Forum: Camera board
Topic: [Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B
Replies: 6
Views: 649

[Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B

This appears to be essentially resolved but I'm not sure why. Ran a sudo apt update / sudo apt full-upgrade / sudo rpi-eeprom-update on the 29th of April (Wednesday evening) This was in readiness to have a look at the new boot diagnostics at the weekend. However - without even having physically chan...
by d_older
Sun Apr 26, 2020 4:27 pm
Forum: Camera board
Topic: [Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B
Replies: 6
Views: 649

Re: Dropped frames capturing 120fps MJPEG video with Pi4B

Hi Hermann, Just checked again on the pi4B2 again and cut and pasted the command from the last pi3 run raspivid -cd MJPEG -t 10000 --mode 7 -w 640 -h 480 -fps 120 -a 512 -pts 480_pts.txt -ex off -ss 8000 -o test_vid_480_10_pts.avi and get the same issue (334 frames lost, largest gap 33.185ms). If yo...
by d_older
Sun Apr 26, 2020 3:05 pm
Forum: Camera board
Topic: [Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B
Replies: 6
Views: 649

Re: Dropped frames capturing 120fps MJPEG video with Pi4B

Hi Hermann, Thanks for that - that confirms my suspicion about the different numbers in the analysis . I'll check once again that the commands were identical (swap camera back to 4B2). Either way, I'll confirm that and then see if 6by9 sees this and recommends which repo to log the fault against tom...
by d_older
Sun Apr 26, 2020 1:15 pm
Forum: Camera board
Topic: [Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B
Replies: 6
Views: 649

Re: Dropped frames capturing 120fps MJPEG video with Pi4B

Hi Hermann, Thanks for your reply: Assuming "^<" was a typo for "^>" the results are as follows:- Pi3B+ (1 frame skipped result) creating tstamps.csv 1196 frames were captured at 120fps frame delta time[us] distribution 1 8276 3 8286 1 8288 1 8289 1 8290 2 8291 2 8292 19 8293 65 ...
by d_older
Sun Apr 26, 2020 11:19 am
Forum: Camera board
Topic: [Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B
Replies: 6
Views: 649

[Solved] Re: Dropped frames capturing 120fps MJPEG video with Pi4B

Hi All, I haven't seen this specific Pi4 behaviour issue referenced in the forum before. TL:DR Capturing a 640 x 480 at 120fps MJPEG video with a V2 camera into a tmpfs "ramdisk" loses about 320 to 350 frames in 10 seconds with a pi4B2 but none or 1 with a Pi3+ (A or B) . Has anyone else s...
by d_older
Thu Feb 27, 2020 10:45 pm
Forum: General discussion
Topic: Mouse and keyboard not working on Raspberry Pi 4
Replies: 7
Views: 6734

Re: Mouse and keyboard not working on Raspberry Pi 4

Hi ereus6 Are all the keyboards and mice you tested wireless - I notice what looks like a Logitech Unifying Receiver in a USB3 port. USB3 ports on many devices are known to interfere with 2.4GHz wireless devices. I would try any keyboard / mouse (wireless or wired) in the USB2 ports with nothing con...
by d_older
Tue Oct 01, 2019 7:59 pm
Forum: Troubleshooting
Topic: RPI4 Ethernet port needs 8 wires?
Replies: 13
Views: 2580

Re: RPI4 Ethernet port needs 8 wires?

Hi nophead Just checked with a 2 pair/4core cable into a Netgear Prosafe GS105 (unmanaged switch) and it looks OK @100Mbit pi@pi4B:~ $ sudo mii-tool -v eth0 eth0: negotiated 100baseTx-FD flow-control, link ok product info: vendor 18:03:61, model 10 rev 2 basic mode: autonegotiation enabled basic sta...
by d_older
Sat Sep 14, 2019 9:08 pm
Forum: Troubleshooting
Topic: Failed to start Backend server for 1-wire control
Replies: 5
Views: 2471

Re: Failed to start Backend server for 1-wire control

Hi Mick, I did this a couple of nights ago on a ZeroW with Buster and got the same/very similar results (for a DS9490 USB controller). After going through the "systemctl enable / start / stop/ disable" options I couldn't find anything obviously wrong. I also couldn't find any solutions by ...
by d_older
Sat Jun 29, 2019 8:56 am
Forum: Troubleshooting
Topic: Backspace key on official keyboard not working properly?
Replies: 5
Views: 1331

Re: Backspace key on official keyboard not working properly?

Hi Dud, Just tried my UK Pi keyboard (Bus 001 Device 004: ID 04d9:0006 Holtek Semiconductor, Inc. ) on both my Pi4 and Debian i5 machine and a "tap" on the Backspace key works as expected. (Num Lock on or off - just in case it had any effect) The usual cause of "weird" issues is ...
by d_older
Sat Jun 22, 2019 11:12 am
Forum: Networking and servers
Topic: Issue with connecting GPS module to raspberry pi 3b+
Replies: 4
Views: 877

Re: Issue with connecting GPS module to raspberry pi 3b+

Hi dipayan,

You should not need an additional USB to serial device, looking at the links there is a USB to serial chip (CP2102) built in to the module. I would just connect it with a micro USB lead and check that a ttyUSBn device is created.

Hope this helps,

Dave
by d_older
Sat Jun 22, 2019 9:00 am
Forum: Networking and servers
Topic: Issue with connecting GPS module to raspberry pi 3b+
Replies: 4
Views: 877

Re: Issue with connecting GPS module to raspberry pi 3b+

HI dipayan, Looking at https://wiki.52pi.com/index.php/USB-Port-GPS_Module_SKU:EZ-0048 and https://www.robotshop.com/uk/us-gps-l80-39-gps-module-raspberry-pi.html They imply that the module as a whole requires a 5V supply and it is NOT clear that it will work from 3.3V on the Vcc pin. Also it is not...
by d_older
Wed May 22, 2019 8:05 pm
Forum: General discussion
Topic: Raspberry Pi 3 to 12V Induction sensor
Replies: 9
Views: 1502

Re: Raspberry Pi 3 to 12V Induction sensor

Hi gxmark,

It doesn't look like the ground of the battery powered circuit is connected to the Pi's ground. Without this, the pi's input is just floating / acting as an antenna.

Hope this helps

Dave
by d_older
Sat May 04, 2019 11:41 am
Forum: General discussion
Topic: Is this an official power supply?
Replies: 20
Views: 2330

Re: Is this an official power supply?

Hi echmain, Just for info, when I was in the Cambridge Raspberry Pi shop I noticed they stocked a second type of official power supply in addition to the one shown by HawaiianPi, described as a non-interchange head version. That, obviously, had UK pins and hence had a vertical orientation. Unfortuna...
by d_older
Sun Apr 21, 2019 9:24 am
Forum: Beginners
Topic: Selecting text automatically copies it - how to stop
Replies: 20
Views: 2079

Re: Selecting text automatically copies it - how to stop

Hi seanspotatobusiness ,

The Leafpad text editor uses the ctrl-C ctrl-V method including "over"paste - note however middle button paste could bring things selected outside leafpad.

Dave
by d_older
Sat Apr 20, 2019 10:53 pm
Forum: C/C++
Topic: Making sense of ADS-B checksums & bitfields
Replies: 52
Views: 10345

Re: Making sense of ADS-B checksums & bitfields

Hi ab1jx, I always use a desktop to view the output remotely - so it is doing all the javascript processing. I might get chance to set up a 3B in place of the zero with everything else the same and see how that affects the stats (although this is probably not the best weekend for trying to compare a...
by d_older
Wed Apr 17, 2019 7:14 am
Forum: C/C++
Topic: Making sense of ADS-B checksums & bitfields
Replies: 52
Views: 10345

Re: Making sense of ADS-B checksums & bitfields

Hi ab1jx, Oops :oops: I've just had a look back at my installation notes and I'm NOT using the internal webserver but am using lighttpd on the pi. The dump1090 version I used was git clone https://github.com/tedsluis/dump1090.git as the source and built a deb package from that. the lighttpd modules ...
by d_older
Tue Apr 16, 2019 10:44 pm
Forum: C/C++
Topic: Making sense of ADS-B checksums & bitfields
Replies: 52
Views: 10345

Re: Making sense of ADS-B checksums & bitfields

Hi ab1jx,

If you ever do find a way of getting a system to cache the map tiles at the viewing end I would be most interested - a truly portable/isolated visual ADSB receiving station :-)

Dave

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