Maybe using hex values could confuse you or compiler less (i.e. maybe the output on screen look same but binary data in string is in fact different)?

Also if it still doesn't work you could steal the code from https://garage.maemo.org/plugins/scm...ot=powerlaunch
see dsme.c and .h, void dsme_connect(Powered *server) has slightly different socket setup.

EDIT:
also you may try to drop unneeded /mnt/initfs/ from path to dsme socket but that perhaps won't fix anything