This function sends dimming commands (using Switch Multilevel Command Class) to devices in association group defined as ZUNO_ASSOCIATION_GROUP_SET_VALUE_AND_DIM (see ZUNO_SETUP_ASSOCIATIONS). zunoSendToGroupDimmingCommand(CTRL_GROUP_n, direction, start_stop) CTRL_GROUP_n number of group: CTRL_GROUP_1, ... CTRL_GROUP_5 direction FALSE for dimmig up, TRUE for dimming down start_stop TRUE to start diming, FALSE to stop dmming
        zunoSendToGroupDimmingCommand(CTRL_GROUP_2, FALSE, TRUE); // start dimming up