Dave Olson built an XBee-equipped ice fishing rod that sends him a msg if his rod catched a fish. This device can save you hours of waiting 🙂

The tip up alerts the fisherman when they have a fish in real time via text message. The tip up uses electric current switch magnets attached to an XBee DIO Adapter, which reads when a fish is caught. Sending this information through a cellular gateway, your phone receives a “fish on!” text message. The solution can be used with multiple tip ups and/or a ZigBee mesh network.