My most favourite combined sensor (well OK it would be the Maxim DS1923 iButton, but have you seen the price - I feel guilty asking for a sample one), Sensirion, are bringing out a new sensor that has a true I2C interface, rather than the 'roll their own' of previous versions . Downside is that they are in a DFN package - but I've sent away for some samples any way. http://www.sensirion.com/en/01_humidity_sensors/05_humidity_sensor_sht 21/00_humidity_sensor_sht21.htm Colin -- cdb, 3/07/2009 -- colin@btech-online.co.uk -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist