LinkTrucker

Final Thoughts

• This is pretty handy to have around!
• Connecting the activity light allows you to see network traffic.
• The Arduino Ethernet case is great for this application.
• I wish the Arduino Ethernet case was better made.
• I added an overkill DC voltage regulator - as I'm plugging this into $1000+ hardware right?
• Should run for a couple of days on a 9V.
• Someone should expand on this and add BlueTooth and a phone app!
• Arduino Ethernet is easy and cheap - Must make more things!

- Kris

Maybe I was a little misled by how tiny this case is. Originally designed for the Ethernet shield, I don't think anything extra was supposed to go in. The little battery cover "looks" like a standard 9v size, but it's actually 1/4" smaller than the battery itself. I dislike not having case screws after trimming 4 of the 5 plastic posts, but it fits...

The Ethernet module is solid and tight, and I may tape the edges from having it pop open, but I'm happy how it turned out.

I'll follow-up with a demo video tomorrow!

This is how you know your doing Arduino correctly! ;)
You could delete all the Serial.print lines and disable Serial.begin(9600);
This should save a bunch of memory and make for a better tomorrow... but "Global variables use 1,558 bytes (76%) of dynamic memory, leaving 490 bytes for local variables. Maximum is 2,048 bytes." seem fine to me as this is all this poor UNO will ever be asked to do.

- Kris

Inside Dhcp.h, there is a response timeout constant of 60,000. I just changed it to 10,000 (10 seconds), and now timeout occurs about 12-13 seconds after a reset.

int beginWithDHCP(uint8_t *, unsigned long timeout = 10000, unsigned long responseTimeout = 4000);
};

Found here: http://forum.arduino.cc/index.php?topic=105397.0 Hat-tip to jstamour802

After some failed experiments, I found that the Norbert Truchsess library UIPEthernet located here: https://github.com/ntruchsess/arduino_uip is the best for those "ebay" cheap ENC28J60 brakout boards.

I used the following PIN configuration:
(4) SO - 12
(5) SI - 11
(6) SCK - 13
(7) CS - 10

(9) VCC - 3.3V
(10) GND - GND