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by sparkie777
Mon Aug 24, 2020 2:15 pm
Forum: Troubleshooting
Topic: In need of a long power source for Pi4
Replies: 6
Views: 262

Re: In need of a long power source for Pi4

if an 100Mbps ethernet connection is sufficient for your project I would use something like an Passive PoE Injector solution: Passive PoE Injector Cable Set ID: 435 this way 12V is transported over 2 twisted pairs of your ethernet cable. The other two pairs is for the ethernet connection. The length...
by sparkie777
Sun Aug 23, 2020 4:59 pm
Forum: Beginners
Topic: Power supply for Raspberry pi 4
Replies: 8
Views: 1191

Re: Power supply for Raspberry pi 4

Indirectly? possible if you have a buck converter with you, output set to 5.1v, current rated at least 3A, correct. I love these ones: UBEC 3A 5V for Helicopter Airplane Receiver Servo Power Supply: Toys & Games are available for cheap 2.50€ (at least here in Germany). Output voltage about 5.2V. Th...
by sparkie777
Wed Aug 19, 2020 5:01 pm
Forum: Deutsch
Topic: Mehrere Geräte an einem Netzteil
Replies: 3
Views: 694

Re: Mehrere Geräte an einem Netzteil

mit einer UBEC kannst du aus 12V einfach 5V bereitstellen. Bilder hab ich hier hin gestellt: Post Anschluss von 5V entweder direkt an der GPIO Leiste oder ueber USB. Beispiel zeigt einen Pi0W. Die UBECs liefern z.B. 3A an 5V und kosten ca. 3€: 3A / 5V U-Bec 2...3S Lipo oder 5...12 NiMh Lipo Akku BEC...
by sparkie777
Wed Aug 19, 2020 1:22 am
Forum: General discussion
Topic: Clustering zero pi's?
Replies: 21
Views: 1139

Re: Clustering zero pi's?

thanks for all the suggestions. I will buy some Pi0WHs and give the header removal a try. I think we should return to the main topic...
by sparkie777
Tue Aug 18, 2020 7:02 pm
Forum: General discussion
Topic: Clustering zero pi's?
Replies: 21
Views: 1139

Re: Clustering zero pi's?

sounds good. I hope the plastic eases off in one fell swoop. The remaining work is easy.
by sparkie777
Tue Aug 18, 2020 6:18 pm
Forum: General discussion
Topic: Clustering zero pi's?
Replies: 21
Views: 1139

Re: Clustering zero pi's?

that's what I've thought of. But I haven't found a tool for an affordable price to do that in a timely manner. :D
by sparkie777
Tue Aug 18, 2020 5:07 pm
Forum: General discussion
Topic: Clustering zero pi's?
Replies: 21
Views: 1139

Re: Clustering zero pi's?

correct. So I'm wondering how you could ever build a "raspberry pi zero cluster" (without bulky headers) with a healthy amount of processors.
by sparkie777
Tue Aug 18, 2020 5:01 pm
Forum: General discussion
Topic: Clustering zero pi's?
Replies: 21
Views: 1139

Re: Clustering zero pi's?

anyway, how will you get at all the Pi0s in quantity? My shop sells me only 1 Pi0 at a time.

and no - those bulky Pi0WH are not an acceptable replacement (for me at least) :D
by sparkie777
Sun Aug 16, 2020 2:10 pm
Forum: Troubleshooting
Topic: PI 4 eth0 link does not come up if only 2 twisted pairs are wired up (100Mbps)
Replies: 6
Views: 241

Re: PI 4 eth0 link does not come up via 100Mbps cable

@6by9:
great, that helped! Yeah, maybe there will be a fix for PI 4 as well in the future.

"without acknowledging any legal obligation" :D

Thanks for your effort to report the issue to Broadcom/Microchip.
by sparkie777
Sun Aug 16, 2020 1:55 pm
Forum: Troubleshooting
Topic: PI 4 eth0 link does not come up if only 2 twisted pairs are wired up (100Mbps)
Replies: 6
Views: 241

Re: PI 4 eth0 link does not come up via 100Mbps cable

if I connect two GbE ports (the one of a PI 4 and the other on a switch) via an 100Mbps cable I would expect the auto negotiation to use 100Mbps. That was exactly the case with all PIs != PI 4 at least. if I connect any two GbE switch ports via an 100Mbps cable it always negotiates 100Mbps. Works wi...
by sparkie777
Sun Aug 16, 2020 11:43 am
Forum: Troubleshooting
Topic: PI 4 eth0 link does not come up if only 2 twisted pairs are wired up (100Mbps)
Replies: 6
Views: 241

PI 4 eth0 link does not come up if only 2 twisted pairs are wired up (100Mbps)

I use 100Mbps cables for ethernet connection in some cases. Since 4 of 8 wires are used to supply power to the PI (via an 5V/3A UBEC being placed close to the PI). Dependent on the switch brand this results in permanent link down (e.g. after boot). System is up-to-date and based on Raspberry Pi OS (...
by sparkie777
Sun Aug 09, 2020 6:49 pm
Forum: Beginners
Topic: Transferring sound data using Pi
Replies: 3
Views: 126

Re: Transferring sound data using Pi

PulseAudio

Network transparency, allowing an application to play back or record audio on a different machine than the one it is running on.
by sparkie777
Thu Aug 06, 2020 11:06 am
Forum: Networking and servers
Topic: Connect Pi Zero with RJ45 adapter
Replies: 9
Views: 573

Re: Connect Pi Zero with RJ45 adapter

If that is the case, could you confirm to me that once the ethernet adapter soldered and connected with an ethernet cable (RJ45) to the local network/internet box, it provides to the Pi Zero, not only internet, but also power. as being said power must be provided elsewhere of course. To continue wi...
by sparkie777
Thu Aug 06, 2020 9:04 am
Forum: Networking and servers
Topic: Connect Pi Zero with RJ45 adapter
Replies: 9
Views: 573

Re: Connect Pi Zero with RJ45 adapter

USB pins are accessible on Pi0 via nicely placed solder pads. Simply cut off the USB-A plug from your favorite Fast-Ethernet RJ45 Adapter. Since the USB-A variants are the cheapest. And connect the wires directly. Be sure to connect nothing else to the same USB port :D provides a much more compact s...
by sparkie777
Wed Aug 05, 2020 2:00 am
Forum: Troubleshooting
Topic: [Stretch/Buster] Using LIRC with kernel 4.19.X and gpio-ir
Replies: 68
Views: 46164

Re: [Stretch/Buster] Using LIRC with kernel 4.19.X and gpio-ir

maybe OT since we reached 5.4.51+ already... However, when using irrecord it never seems to acquire proper data. I can't seem to ever make 2x80 dots happen and when I do make the entire config file for my remote buttons it always has zeros for all values. neither 'irrecord' nor 'irsend' works with s...
by sparkie777
Tue Aug 04, 2020 4:24 am
Forum: Troubleshooting
Topic: lircd.conf working flawlessly on jessie utterly fails on buster
Replies: 4
Views: 392

Re: lircd.conf working flawlessly on jessie utterly fails on buster

thanks for the tip.

Both 'raspberrypi-kernel' and 'rpi-update' end up in '5.4.51+' at the time of this writing.

So there is no improvement regarding the given LIRC TX problems after the install of 'd764cbe6dda70aa1e05d00b0dff20d7f65f210d7'
by sparkie777
Mon Aug 03, 2020 11:01 am
Forum: Troubleshooting
Topic: lircd.conf working flawlessly on jessie utterly fails on buster
Replies: 4
Views: 392

lircd.conf working flawlessly on jessie utterly fails on buster

I tried to upgrade some of my LIRC RPis from Raspbian jessie to current buster. Unfortunately with near to zero success. Hardware: Model: Raspberry Pi Model B Rev 2 Software: Raspbian, Debian Buster based (system is up to date): # uname -r 5.4.51+ /boot/config.txt: [...] dtoverlay=gpio-ir,gpio_pin=1...
by sparkie777
Sun Aug 02, 2020 4:35 am
Forum: Troubleshooting
Topic: [SOLVED] Upgrade appears to have broken TinyLCD35 display
Replies: 22
Views: 1019

Re: Upgrade appears to have broken TinyLCD35 display

W. H. Heydt wrote:
Sat Aug 01, 2020 9:46 pm
cmdline.txt...

Code: Select all

dwc_otg.lpm+enable=0 console=ttyAMA0,115200 console=tty1 root=PARTUUID=738a4d67-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait fbcon=map:10 consoleblank=0
you mean

dwc_otg.lpm_enable=0...

?
by sparkie777
Sat Aug 01, 2020 3:59 pm
Forum: Networking and servers
Topic: Problem with AP settings
Replies: 2
Views: 366

Re: Problem with AP settings

seen that?

Raspberry Pi 4b WiFi 5Ghz (ac) bugs - Raspberry Pi Forums

don't know if it still applies to the most current OS
by sparkie777
Sat Aug 01, 2020 3:33 pm
Forum: General discussion
Topic: Adafruit pitft 3.5 inch resistive touchscreen not working
Replies: 3
Views: 272

Re: Adafruit pitft 3.5 inch resistive touchscreen not working

what exactly did you do to configure pitft? looking at firmware/README at master · raspberrypi/firmware lists: Name: pitft35-resistive Info: Adafruit PiTFT 3.5" resistive touch screen Load: dtoverlay=pitft35-resistive,<param>=<val> Params: speed Display SPI bus speed rotate Display rotation {0,90,18...
by sparkie777
Sat Aug 01, 2020 10:23 am
Forum: Beginners
Topic: know a command-line for turning off the screen ? [SOLVED]
Replies: 5
Views: 420

Re: know a command-line for turning off the screen ?

turn off console:

Code: Select all

tvservice -o
turn on again:

Code: Select all

tvservice -p
I don't use X11 on RPi. So I can't tell how these commands interact with X11.
by sparkie777
Fri Jul 31, 2020 3:04 pm
Forum: Troubleshooting
Topic: Less than Pi Zero
Replies: 7
Views: 350

Re: Less than Pi Zero

I love all my RPiZs too :D RPiZs allow setup of cheap, tiny, high quality network cameras. a RPiZ class board (>= v1.3) forms a great part of "glue logic" to interface the CSI camera connector interface to the ethernet or WLAN. regular RPi (non-RPiZ class) boards are rather overkill (regarding cost ...
by sparkie777
Sun Jul 12, 2020 12:19 pm
Forum: Camera board
Topic: Low-latency network stream
Replies: 3
Views: 598

Re: Low-latency network stream

don't know if that will help you. I use raspivid + mplayer and these two give me the best results I've seen so far. Server: raspivid -v -fps 15 -md 2 -n -rot 180 -mm spot -ih -t 0 -l -o tcp://0.0.0.0:5001 Client: mplayer -title t00 -nostop-xscreensaver -fps 15 -vo xv -xy 1200 -vf rotate=1,screenshot...
by sparkie777
Sat Jul 11, 2020 8:31 am
Forum: Beginners
Topic: How to take control of Android from RPI?
Replies: 6
Views: 280

Re: How to take control of Android from RPI?

just install Termux on your smartphone and you will have full access to your Android (of course within the limits of a normal 'app') via 'ssh', 'scp', 'rsync' and all the other useful tools known from linux.
by sparkie777
Sat Jul 11, 2020 4:33 am
Forum: Off topic discussion
Topic: Worst "production" Pi hardware installation
Replies: 26
Views: 2304

Re: Worst "production" Pi installation

for improved mechanical stability it is advisable to put the 3 cables under decent tensile load allowing to maintain an angle of about 120 degrees between them

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