(stm32f3_agents) transmitter: Bunch of fixes
(stm32f3_agents) transmitter: Bunch of fixes

Clear error flags, fix led addressation and so on

Kakadu/embox,Kakadu/embox,Kakadu/embox,Kakadu/embox,embox/embox,embox/embox,Kakadu/embox,embox/embox,embox/embox,embox/embox,embox/embox,Kakadu/embox,Kakadu/embox