ethersex/ethersex — pull request #178 by dschulte (2012-12-03 12:38:45+00:00)
Title: Support for MCP9801 temperature sensor

Adds support for MCP9801 temperature sensors.

Based on DS1631 but completely rewritten as DS1631 implementation is broken by design:
- wrong conversation of decimal place for negative temperatures (also see mailing list)
- minus sign gets lost for temperatures between 0°C and -1°C (-0.x°C)