@tbowmo You mentioned the version number. I have somehow managed to get a very old IDE. Can't remember where I installed it from, but that seems to be the source of evil. Thank you all again!

@hek I have two sensors in my network ( temp , Hum ) and motion detection. both working in auto mode and request node id from controller ( raspberry pi ) node via gateway . but unfortunately, reponse code of both nodes get same node id 1. may be bug in sendNextAvailableSensorId() function response. any idea? thanks