|From Chris’ Miscellanea|
I wrote some code to read in the data using the input-capture mode of the Timer/Counter1 in a AVR ATmega32u4 (way overpowered, but it's handy on a Olimexino 32U4 board) to learn about using the LUFA USB library a little, maybe someone can put it to actual use?
$ cu -l ttyACM0
AS2302 raw bytes: recv cnt=0 01 76 00 fa 71
status: 0, temp=250 (*0.1 dC), rh=374 (*0.1%)