DS18B20 Notes

The code below is adapted from the A/V fan controller project, which has an LED connected to output 2 of the PICAXE as a power/activity indicator.

What's going on if the LED lights up very briefly once a second?
  high 2               'indicate a read is in progress (takes about one second)
  ReadTemp 1, Temp_8   'read the high 8 bits from the DS18B20 on input 1
  low 2
  pause 1000           'wait one second
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