I have a system with HP2564 and WS90 for weather, soil moisture. To add a WFC01 (water control valve) i have had to add a GW2000 hub to interface to the water valves. The hub is located in a steel structure shed and does not have the required signal strength to reach all water valves out in the field. What options do i have for extending the signal (antenna / repeater) or is the only alternative to mount the GW2000 outside in plastic IP67 housing?