i've just compiled and uploaded latest stable marlin firmware (1.0.x) directly from the marlinfirmware repository and exactly the same thing is happening: both sensors are reading 40C when both resistors measure approx 100kOhms and the actual temperature in the room is around 23C.
i have a mendel90 as well with pretty much exactly the same firmware, running on a Melzi, and that's reporting the correct temperatures. any clues where to begin investigating greatly appreciated.
i have a mendel90 as well with pretty much exactly the same firmware, running on a Melzi, and that's reporting the correct temperatures. any clues where to begin investigating greatly appreciated.