Ethernet Polling vs Broadcasting on an Embedded device
I have asked to design a test system for an Ethernet enabled weather
station. At this point, these weather stations are nothing but 2 PCs
running Linux on it and they constantly read weather related
through some sensors. Eventually they will be replaced with a miniature
embedded Linux device (yet to be designed!).
I have worked extensively with 1/2 duplex RS485 networks where we poll
device and then send an acknowledgment to the device. I am not too sure
what is the best way to handle an Ethernet enabled devices. The
engineers have agreed to change the Firm...Ethernet Device
I'm considering what kind of project I'd like to do for my next year
in college. I have an idea for creating a network host device that will
work on an Ethernet LAN. Obviously, my device would need some sort of
Network Interface Card in it.
Thinking about it for about 10 seconds tho, I realised that it might
be a *very* complicated job to create a Network Interface Card,
considering things like having to implement Carrier Sense Multi-
Access/Collission Detection. Not that I'm one to shy away from a big job,
but I plan on having this project done within a year :-P
...Ethernet I/O device
I hadn't noticed this before.
It's a bit pricey but might come in handy for the solder-challenged.
...Adding ethernet device driver
I added Realteck 81x59 ethernet card to my pc. And also i added the
driver. The problem is while iam doing communication betn linux and
vxworks system using udp protocal i can,t send or receive messages. It
is giving as HOST UNREACHble. These two systems are directly
connected using ethernet cable.
How to check in the target shell whether the driver is added properly
added are or not?
Thanks in advance
Can you ping the vxworks system? Does any communication between the systems
work, or is just UDP behaving badly?
What type of cable is connected between the two systems? ...Ethernet device in char mode?
I am looking for a way to put an ethernet device in a sort of
"character device" mode where I can simply read and write to it
without going through the TCP/IP stack. I am trying to test some
network hardware and right now I only care that what comes out of it
is identical to what went in to it. Does anyone have any ideas?
Jeff Ward wrote:
> I am looking for a way to put an ethernet device in a sort of
> "character device" mode where I can simply read and write to it
> without going through the TCP/IP stack. I am trying to test some
> network hard...finding connected ethernet device
I have a laptop with an ethernet (eth0) and a wireless interface (eth1).
I'm using KNetworkManager to connect to networks, and in
Options>Configure>Notifications, have activated the Notification
"NetworkManager is now connected" to run a script ~/bin/connected.sh.
Thus, the script gets executed whenever I'm connecting to any network,
and handles starting some programs, e.g. ntpdate, synchronization of
This happens independently of what network interface the connection is
using. Now, I'd like to distinguish between ethernet and wireless (I...How do I communicate with 3 Ethernet devices
I am new to using ethernet and I need help writting a LabVIEW vi to communicate with 3 Omega devices. I need to open a connection to all 3 at the same time and read data from each. I am able to communicate with them individually using the TCP/IP vis (see attached vi) but I don't know how to communicate with all 3 at the same time.
Can anyone help?
Hello BertYou can simply replicate your code (copy and paste) so as to open multiple TCP/IP sessions to all three instruments as the same tim...Talking to an RS232 device over Ethernet
I would like to get data from an RS232 device. I am using a MOXA
serial/ethernet converter (works well in another app). The converter
is set up independent of VB. How do I code ASCII commands and pass to
the device? The converter has an IP address.
thanks for any help in advance
I've never used the MOXA converters but the ones that I have used
(Comtrol DeviceMaster, and others) have Winsock servers built into
them. You put a Winsock in your program and communicate that way. As
far as the ASCII commands are concerned, I would think that you'll
have to read the manuals that came wi...Making an ethernet-wired device wireless
I got my hands on an Onkyo Net-Tune NC-500-- a digital audio receiver
which normally connects to a PC via ethernet. I'd like to make it
connect wirelessly, but I can't find any information on how to do so.
Plug the ethernet cable into a WAP?
<email@example.com> wrote in message
>I got my hands on an Onkyo Net-Tune NC-500-- a digital audio receiver
> which normally connects to a PC via ethernet. I'd like to make it
> connect wirelessly, but I can't find any information on...