52_I2C_PCA9685.pm: set outputs to old state after frequency change, set more than one port at the same time, bugfixing
git-svn-id: https://svn.fhem.de/fhem/trunk/fhem@10452 2b470e98-0d58-463d-a4d8-8e2adae1ed80
52_I2C_SHT21.pm: changed data readout process to work with FRM, added CRC check
git-svn-id: https://svn.fhem.de/fhem/trunk/fhem@10402 2b470e98-0d58-463d-a4d8-8e2adae1ed80