The builder of our home installed a Hydro-Rain HRC-100 Wireless Rain/Freeze Sensor connected to a Hydro-Rain HRC-100 C Irrigation Controller. The Sensor (Photo 1) is apparently powered by two 24VAC OUT terminals in the IC (Photo 2). I just purchased a 16 zone Gen2, and want to find out whether the existing HRC-100 sensor is compatible, and if so, how do I wire it to the Gen2, and program it. If it is not compatible, what is the best wireless Rain/Freeze sensor that you would recommend that is compatible with the Gen2?