I am in the process of installing an HAI Wireless Driveway Sensor, but am having a very strange issue. I have the sensor placed approximately two feet from my concrete driveway and roughly 35 feet from the wireless receiver. It is simply stuck in the ground utilizing it's provided stake. The sensor does not sense vehicles as we drive by, no matter how slowly. It does however occasionally trigger a Not Ready event when no vehicles are present. I decided to write an automation block to create an entry in the Event Log lastnight to try to determine how often it was sensing Not Ready. When i checked it this morning, I discovered a very strange pattern. The sensor is consistantly transmitting Not Ready ever 68.7 minutes (events were consistantly either 69 minutes or 68 minutes apart with an average of 68.7 minutes). Has anyone else seen this or does this interval mean anything to anyone?