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by sparkie777
Wed Oct 06, 2021 9:10 am
Forum: Other projects
Topic: Long range Ethernet Communication
Replies: 4
Views: 443

Re: Long range Ethernet Communication

basically yes. But I'm not aware of any ready-to-use software/hardware controlling 2 camera servos.
by sparkie777
Tue Oct 05, 2021 4:38 pm
Forum: Other projects
Topic: Long range Ethernet Communication
Replies: 4
Views: 443

Re: Long range Ethernet Communication

I would suggest passive PoE for your project. You will find a very compact solution to the problem here: HOWTO: upgrade Pi0 with Ethernet and passive PoE the cheapest and most compact way this will solve the power and ethernet issue. I use this solution for my surveillance cameras (with motion detec...
by sparkie777
Mon Oct 04, 2021 7:14 pm
Forum: General discussion
Topic: Why is wifi so unreliable on RPI4?
Replies: 47
Views: 3031

Re: Why is wifi so unreliable on RPI4?

anyway, asking "Why is wifi so unreliable on RPI4?" is simply plain wrong. Implying it's a special deficiency of an Pi4.

Wi-Fi is unreliable immanently (aka by nature™). It's just that simple.
by sparkie777
Mon Oct 04, 2021 2:07 pm
Forum: General discussion
Topic: Two-way data transfer between Pi's over a very long cable
Replies: 53
Views: 2650

Re: Two-way data transfer between Pi's over a very long cable

concerning the connection, I would simply use the cheap 2 strand copper cable solution for both power feed and communication. If you don't need the power feed even a thin and flexible 1 strand copper wire would be sufficient for the communication. Conventional Homeplug AV adapters ( Homeplug AV2 pro...
by sparkie777
Sun Oct 03, 2021 7:14 pm
Forum: Advanced users
Topic: Use RING doorbell with Raspberry Pi?
Replies: 2
Views: 353

Re: Use RING doorbell with Raspberry Pi?

there is a german speaking forum dealing with Pi door communication systems:

DoorPi Forum

maybe you find it useful
by sparkie777
Wed Sep 29, 2021 2:11 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: two pi4 with serial into each other
Replies: 15
Views: 878

Re: two pi4 with serial into each other

RaTTuS wrote:
Wed Sep 29, 2021 2:02 pm
I did this a long time ago viewtopic.php?t=51633
nice! I haven't seen this before. I will put a link from my posting to yours I you don't mind :D
by sparkie777
Wed Sep 29, 2021 1:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: two pi4 with serial into each other
Replies: 15
Views: 878

Re: two pi4 with serial into each other

when it comes to connect 2 Pis via the serial interface to 'have a connection into the other' I prefer do it like this: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires) - Raspberry Pi Forums from that point on it's fully transparent to a regular TCP/IP connection. W...
by sparkie777
Wed Sep 29, 2021 12:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: two pi4 with serial into each other
Replies: 15
Views: 878

Re: two pi4 with serial into each other

for me it's not clear how OP did connect available serial interfaces at all

Code: Select all

Pi1:                   Pi2:
/dev/ttyAMA0   <->     /dev/ttyAMA0 
/dev/ttyUSB0   <->     /dev/ttyAMA0
/dev/ttyAMA0   <->     /dev/ttyUSB0
/dev/ttyUSB0   <->     /dev/ttyUSB0
?
by sparkie777
Wed Sep 29, 2021 10:33 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: two pi4 with serial into each other
Replies: 15
Views: 878

Re: two pi4 with serial into each other

you can't use 'console=serial0,115200 console=tty1' and 'screen' at the same time on the same Pi. The serial device can be opened only once (i.e. by only one application) at anytime.
by sparkie777
Tue Sep 28, 2021 7:40 pm
Forum: General discussion
Topic: Raspberry Pi very early boot issue
Replies: 45
Views: 3146

Re: Raspberry Pi very early boot issue

maybe it would help to reattach at least the 'power supply circuitry' in piggyback style to the leftover mainboard fragments :D
by sparkie777
Tue Sep 28, 2021 6:35 pm
Forum: General discussion
Topic: rsync deleting and recopying files - why?
Replies: 2
Views: 221

Re: rsync deleting and recopying files - why?

something weird happened to the name of 'MicroSD_Images'. It turns to be 'MicroSD_mages' now?! You accidentally renamed it before rsyncing.
by sparkie777
Tue Sep 28, 2021 5:46 pm
Forum: Beginners
Topic: RPi4B - Boot with IR signal
Replies: 26
Views: 1408

Re: RPi4B - Boot with IR signal

Too bad that LIRC stuff turns out to be such a bust. Stops working with just about every upgrade. Otherwise it would be a great way to control a Pi w/o any extra components at all. correct. That's why my RPIs for controlling IR devices still run debian lenny :D I've heard the successor of 'lirc' is...
by sparkie777
Sun Sep 26, 2021 6:40 pm
Forum: Other projects
Topic: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)
Replies: 4
Views: 451

Re: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)

I'm (constructively) curious as to what the actual, underlying goal is here. I had to connect 2 PIs. Unfortunately there are only 4 simple wires (non twisted) available between the locations. I didn't dare to run fast ethernet directly. With ppp the serial connection is transparent to the rest of t...
by sparkie777
Sun Sep 26, 2021 4:54 pm
Forum: Other projects
Topic: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)
Replies: 4
Views: 451

Re: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)

thanks for the updated overlay naming. I corrected this. The 'wvdial' options sound interesting. When I have some spare time I will test it.
by sparkie777
Sun Sep 26, 2021 4:21 pm
Forum: Other projects
Topic: HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)
Replies: 4
Views: 451

HOWTO: establish an IP connection between 2 PIs via the serial interface (3 wires)

[UPDATE as of 2021_09_29] there already exists and older posting doing the same: Connect Model A to Model B via serial lines - Raspberry Pi Forums [/UPDATE as of 2021_09_29] in this context one PI is called 'server' the other one 'client' 0. first connect the serial GPIO pins between both PIs: serve...
by sparkie777
Sun Sep 26, 2021 1:24 pm
Forum: Troubleshooting
Topic: seemingly blank crontab file
Replies: 12
Views: 562

Re: seemingly blank crontab file

I always use 'vi' to either edit via 'crontab -e' or edit directly the file '/etc/crontab'. Never got any problems.
by sparkie777
Sat Sep 25, 2021 2:28 pm
Forum: Troubleshooting
Topic: seemingly blank crontab file
Replies: 12
Views: 562

Re: seemingly blank crontab file

that is what your screen shot is already showing? The file 'root' should belong to group 'crontab' (not root) though.
by sparkie777
Thu Sep 23, 2021 2:41 pm
Forum: Off topic discussion
Topic: Personal Fitness Training App
Replies: 1
Views: 481

Re: Personal Fitness Training App

what OS? For Android I recommend the open source app:

runnerup: A open source run tracker
by sparkie777
Sat Sep 18, 2021 9:35 pm
Forum: Advanced users
Topic: drive name changsing
Replies: 52
Views: 2552

Re: drive name changsing

nl3prc wrote:
Sat Sep 18, 2021 6:23 pm

Code: Select all

mount UUID="852d2220-1675-4680-8ad3-622ec57b42e9" /media/root   ext3    defauls,nofail  0 0
what’s that supposed to mean?

mounting on CLI works like this:

Code: Select all

mount /dev/disk/by-uuid/852d2220-1675-4680-8ad3-622ec57b42e9  /media/root  
by sparkie777
Thu Sep 09, 2021 4:04 am
Forum: Advanced users
Topic: Best way to add a "missing" driver module.
Replies: 2
Views: 317

Re: Best way to add a "missing" driver module.

a complete kernel build is quite fast (e.g. less that 8 minutes on a AMD Ryzen 5 2600X). I would integrate my drivers in this process:

Raspberry Pi Documentation - The Linux kernel
by sparkie777
Wed Sep 08, 2021 6:55 pm
Forum: Advanced users
Topic: Where is the kernel build config file?
Replies: 5
Views: 466

Re: Where is the kernel build config file?

Code: Select all

modprobe configs
cp /proc/config.gz /tmp
gunzip /tmp/config
[UPDATE]
too slow :D
[/UPDATE]
by sparkie777
Wed Sep 08, 2021 1:11 pm
Forum: General discussion
Topic: unable to upgrade tcpdump package
Replies: 7
Views: 449

Re: unable to upgrade tcpdump package

if you are lucky (I mean the dependency hell is not burning too hot) you could proceed that way: goto Package: tcpdump (4.99.0-2) of bullseye: Debian -- Details of package tcpdump in bullseye download tcpdump for your arch: Debian -- Package Download Selection -- tcpdump_4.99.0-2_armhf.deb try to in...
by sparkie777
Wed Sep 08, 2021 12:21 pm
Forum: General discussion
Topic: unable to upgrade tcpdump package
Replies: 7
Views: 449

Re: unable to upgrade tcpdump package

the latest version in buster is: # apt policy tcpdump tcpdump: Installed: 4.9.3-1~deb10u2 Candidate: 4.9.3-1~deb10u2 Version table: *** 4.9.3-1~deb10u2 500 500 https://deb.debian.org/debian buster/main amd64 Packages 100 /var/lib/dpkg/status 4.9.3-1~deb10u1 500 500 http://security.debian.org/debian-...

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