Hi Grant, > Need to clear bit 3, powerup = 1, as well as set bit 0, but: > > control reg (40h) > 7..4 writing zero harmless > 3 INT_clear, power-up default = 1 stops measurement, writing zero > required 2,1 writing zero harmless > 0 start measurement cycle, write '1' to start measurement cycle Oh well, if you say so, fine with me. After all, you are supposed to know that device better than I do. -- Jean Delvare