corrected wrong register address

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
Merge pull request #209 from mguentner/pca9685-fix

corrected wrong register address
RFM12: fixed and updated profiles
Merge branch 'master' of github.com:ethersex/ethersex
RFM12 FS20: make configuration of sender and receiver independent
unified lower / upper case spelling in menus
DHT22/AM2302: corrected bus timing and calculation of negative temperature values
Merge pull request #210 from eku/am2302

DHT22/AM2302
save PROGMEM by using byte2hex in stead of sprintf
Merge branch 'master' of github.com:ethersex/ethersex
DHT: fixed sporadic read timouts/errors
PSTR is defined in pgmspace.h