fix Init_Pin_Client if Firmata is not connected (yet)

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@3394 2b470e98-0d58-463d-a4d8-8e2adae1ed80
minor improvement detecting changed value

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@3395 2b470e98-0d58-463d-a4d8-8e2adae1ed80
Merge branch 'master' into owx_async
refactor OWID to update async as sideeffect of OWX_Search