Pleasant surprise rain sensor

Well I had a pleasant surprise today as its the first time I have used my car in the rain since swapping my standard humidity sensor for a rain and light sensor. I was expecting to have to get the car recoded but the automatic wipers worked straight away with out recoding. Now I have to do is add the extra wire from the new auto light switch to the BCM and I can get the auto lights work and hopefully the CH/LH working too