You could be right for version 1.2. I only have version 1.4 and I used a pic from Ray’s site of an OSPi 1.4 device to show the only case where I knew the rain sensor input to be. For v1,4 I am certain as that is where I connected my rain sensor and, it is working. I believe version 1.4 to be the currently sold version so whoever buys an OSPi board today should get what is in my picture.