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Arduino and EtherShield – Sending UDP broadcast messages

With the ENC28J60 EtherShield, it is possible to create packets other than the regular HTTP and web packets. The UDP packet is one of these. It is simple and connectionless making minimum overhead needed to create packets. In developing the UDP broadcasts I’ve had to expose a number of functions in my EtherShield library, these […]

CurrentCost CC128 working with RRD, Pachube and Twitter.

After finding the instructions at http://www.jibble.org/currentcost/ to create a basic perl script that read the Currentcost datastream, parsed the XML and updated a RRD file I was able to create some power usage graphs. Using the RRDTool CGI application on a local linux box with the apache webserver I’ve got graphs for the last 10 […]