Actually I have a doubt concerning the RevP. I’ll check the wiring, I suspect a cable problem, I’ll check that tomorrow. The other 2 sensors not working -the bmp180 : I’m using the bmp180 library in my 2.3i version but you are using the bmp085 library in the latest version, maybe this lib has a problem in this version. -the IR sensor is not working for a reason I don’t know. Thank you Howard