Easy Ethernet Controller
firmware sees this and echoes the
data back to the sender and the
echoed data is displayed in the
INCOMING DATA window.
The Easy Ethernet Controller
firmware also has instructions that
allow the LED to be toggled.
Clicking on the PORTA = 0x00
sends a message to the Easy
Ethernet Controller to take the
PORT A bit 4 pin low and thus fire
up the LED. The PORT A = 0xFF
does the opposite function.
The DEST PORT value is the
default port address coded into the
Easy Ethernet Controller firmware
and is used by UDP to talk to the
LED bit. Again, the IP ADDRESS is
pointing to my Easy Ethernet
Controller on the Internet and can
be changed to reflect the IP address
that is suitable for your purposes on
You can test both the UDP and
TCP methods of talking to the Easy
Ethernet Controller simultaneously
as the Easy Ethernet Controller is
able to handle a combination of
UDP and TCP messages.
use a Host Name of 126.96.36.199
with a Port of 8088.
For UDP functions, the IP address
is 188.8.131.52 and the port number for echo is 7 decimal while the
port number for LED control is 5000
You can download the UDP VB
program from the EDTP website if
you don't want to write your own.
It's really neat to see things happen to the Easy Ethernet Controller
knowing that the command was
given and transferred via the
Internet or a LAN connection.
Obviously, you won't be able to
"see" the LED toggle at my end.
So, build your own Easy
Ethernet Controller and experience
the thrill. NV
I purposely didn't get into the low-level bits and bytes of the Internet
protocols because I wanted to prove
to you that you don't have to know all
of that to use the Internet and its tools
for control and monitoring.
For those of you that do want to
get down and dirty, there's plenty
of bit-level information available
from various Internet sites and for
the Easy Ethernet Controller
specifically, there's plenty of code
and Internet-control-related text at
You don't have to have a physical
Easy Ethernet Controller to use the
Telnet and VB stuff I described here.
I'll keep an Easy Ethernet Controller
on the net at 184.108.40.206 to allow
you to play with the technology using
your PC and an Internet connection
via your ISP.
To see the Easy Ethernet
Controller from a Telnet connection,