Is there a step by step guide to setting up RG-11 with WD?

Hi,

Has anyone got a step by step guide to getting the RG-11 Rain Sensor to communicate with WD. I have followed the WD-11 advice on this forum, but it is confusing and I think with steps missing. I have tried many times over the last month, but with no success. The RG-11 is working fine with green light flashing and it works with Cumulus. I have it set to Tipping Bucket Mode. Any help would be very welcome. Thank you.