Hey Matt, Starting on page 58 of "Plumbing..." change any reference to "pin.level" to its real function name in the pluming module, which is "digital.output" . Best, Aaron M. Ryan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.concurrency.cc/pipermail/users/attachments/20100329/ee0b995b/attachment.htm>