Notice that you must have firmware 2.0.4 or above in order to use this feature. If you have firmware 2.1.0, you do not need to do this as it’s already the default.
P.S. we also went ahead and made alive http://www.opensprinkler.com, which is the new site for OpenSprinkler that we’ve been working on recently. We are gradually migrating the content from rayshobby.net to the new site. Sorry about any inconvenience this may cause. Thanks.