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by genetix
Sat Nov 28, 2015 3:54 am
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

How is the Pi connected to the camera? If it's using USB then do you have to disconnect the Pi to be able to download the images? Is the camera a Canon, by any chance? Pi is connected to camera via 15 foot USB 2.0 cable Just unplug the 15 ft cable and plug it into the computers USB port No it is no...
by genetix
Sat Nov 28, 2015 12:49 am
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

Wait, you are using actual cameras? With SD cards? Not USB webcams? So, in each box you have 16 cameras and 4 Pis. You take the cards out of the camera images when it's time to collect photos. What is the Pi for? I use actual cameras 20 megapixels, I need high resolution images. I don't take out th...
by genetix
Sat Nov 28, 2015 12:46 am
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

Also could you measure the power consumption with no data running cross that switch trying to simulate when the 4 Pi's are sleeping before they turn back on the take pictures. I will check it tonight. But in reality one of the pi could power it down with a mosfet. My question is still not answer? E...
by genetix
Fri Nov 27, 2015 3:59 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

but the most low power consumption ethernet switchboard uses 3.5 Watts I check with my clamp meter and I got 0.2A on my Tenda G1005D 5ports gigabit switch (all ports connected with data running) Ok it uses a 9V supply but there is a good chance that it has a build-in regulator to convert it to 5V. ...
by genetix
Fri Nov 27, 2015 1:53 am
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

I still recommend the USB hub approach. In each box, one Pi, one or two USB hubs, 16 cameras, one USB wifi dongle (or wired Ethernet to the Pi's Ethernet port). Before your "expert" graduated, did he outline the plan of what he intended to do to finish the project? Can't you continue to follow the ...
by genetix
Fri Nov 27, 2015 1:28 am
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

Is this possible to go from ethernet to USB for data transfer? No. USB is all about hosts and slaves. The USB stick is a slave device, the ethernet to USB is a slave device. Could you clarify a little more for a novice? The 4 Raspberry Pi's during the process of taking pictures with 16 cameras uses...
by genetix
Thu Nov 26, 2015 4:18 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

What about my sugestion using the serial port in PPP to link your 4 Pis together ? It is even possible to link all Pi in daisy chain but I won't recommand it since one bad link and nothing works. But it is possible to power up a switch which is link to each module. A module is a set of 4 Pis . like...
by genetix
Wed Nov 25, 2015 10:50 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

How often do you take a picture? You say you have four Pis in one box, and each Pi has four cameras (presumably they are USB webcams). Are you taking 16 pictures at the same time, or are you staggering the pictures over time? I take a picture every 10 minutes. I have the program that runs an infini...
by genetix
Wed Nov 25, 2015 10:40 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

I reread your post and your are talking about distance limitation. This is maybe why you have 4 Raspberry PIs. The USB can't go over 5 meters without a repeater, or another USB hub. For long distance use RS-422 link for the serial. This way the serial link could be further away than the ethernet di...
by genetix
Wed Nov 25, 2015 10:38 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

Okay, So I am going to explain what is going on, this is a research project. First off, I wasn't all being exactly truthful. I have over 400 cameras and I just can't change the setup. All 4 Pi's in each box has maxed out 16 USB ports for 16 cameras. I appreciate all of your posts, but a lot of this ...
by genetix
Sun Nov 22, 2015 4:01 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

How often do you take a picture? You say you have four Pis in one box, and each Pi has four cameras (presumably they are USB webcams). Are you taking 16 pictures at the same time, or are you staggering the pictures over time? I take a picture every 10 minutes. I have the program that runs an infini...
by genetix
Sat Nov 21, 2015 4:42 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

is your 100 cameras at the same site? A 48 ports switch , like the d-link green version,will use around 9W so it won't drain has much as twelve 5 port switches. There are currently 4 Raspberry Pi's for each solar panel battery box enclosure. I though about making a centralized server but then I wou...
by genetix
Sat Nov 21, 2015 4:39 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

What about this? http://cpc.farnell.com/1/1/64533--adq88-cable-economiser-4-way-8p8c.html This is an 8P8C splitter so I should theoretically work. If so, I can't even get it to the U.S. I need some other way of connecting 4 Pi's via Ethernet to 1 Pi. "Enables four digital voice signals to be transm...
by genetix
Sat Nov 21, 2015 2:44 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

Re: 4 Pis connected to 1 "server" Pi via Ethernet

What about this?

http://cpc.farnell.com/1/1/64533--adq88 ... -8p8c.html

This is an 8P8C splitter so I should theoretically work. If so, I can't even get it to the U.S.

I need some other way of connecting 4 Pi's via Ethernet to 1 Pi.
by genetix
Fri Nov 20, 2015 10:17 pm
Forum: Networking and servers
Topic: 4 Pis connected to 1 "server" Pi via Ethernet
Replies: 45
Views: 9405

4 Pis connected to 1 "server" Pi via Ethernet

Hi all, I am doing research and I have 4 Raspberry Pi's that are using 16 cameras (4 Pi's, 4 cameras per Pi) to take pictures every x amount of minutes. Because of such a large burden of data means I have to download data from every camera via USB cable from 16 cameras, which means I have to interve...
by genetix
Sat Jul 04, 2015 1:24 am
Forum: Automation, sensing and robotics
Topic: USB trouble for picture taking automation
Replies: 1
Views: 336

USB trouble for picture taking automation

Hi all, I am using USB 2.0 cables to power 10 cameras automatically. The issue I am facing is that I am using 60 feet of USB cables for each USB port on the Pi 2.0 and I am not consistently getting all cameras to fire (take pictures). I am using 2 30ft USB hubs to connect these cameras. I have alrea...

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