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Nick Andrew authored
The DS18S20 has only 1 fractional bit whereas DS18B20 has 4, and their temperature register alignment differs. Check the family code to choose the correct multiplier for both devices. Closes #610 Negative temperatures (less than 0°C) are returned as a sign-extended two's complement number. Subtract 0x10000 to recover the proper negative value. Signed-off-by:
Nick Andrew <nick@nick-andrew.net>
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