ZigBee Whole Network Alarm

Hi guys! I’m developing an IoT-based wireless fire alarm system using Arduino and XBee Series 2 modules (based on wireless sensor network).

So for our system, if one of my nodes detect a fire, I would like that all the other nodes in the network (including the node which detected fire) to activate their buzzers and LEDs, at the same time send an alert to the coordinator (which is Raspberry Pi-controlled). How should I be able to do this? Thank you!

Your post indicates zero effort.
Describe how a conventional wired fire alarm system works.
Describe the communication algorithms you have considered for your project.

Is this a for real Fire Alarm system that you intewnd to use in an actual building ?

mikb55:
Your post indicates zero effort.
Describe how a conventional wired fire alarm system works.
Describe the communication algorithms you have considered for your project.

Man, that user didn't asked you to give him all the schematics and source code for the project! I hate these kind of useless posts like yours! If you have an idea or an advice, just help. If not, go in your cave and troll someone else!