hi to all friends.
i'm planning to design a sensor network via xbees. as a stranger to zigbees, i have a lot of questions.
my design is ; i will have 2 nodes and 1 gateway. also gateway will have some sensors and it will have ethernet shield. i will collect data's from other nodes and i will send them to web page.
1) i will use dht11, flame and air quality sensors and a relay. do i have to use arduino on each node ? i saw that most of the projects used just xbees for collecting sensor datas. but later, i will improve each node and add some specifications (extra sensors etc.) if using xbee with that sensors, how many sensors can i connect that ? and how i will program the xbee for sensors ?
2) the area of the sensor network quite big. and i have some walls. thick walls. if i use xbee series 2 50mW wire antenna and if my wall's thick is about a meter, is there any problem occurs ? (between the last node and gateway, there will be 3 walls and about 35 meter distance.) and i heard that, if a node have long distance to gateway, and if there is a closer node (as a router) can information jump over that router to get reach gateway ( coordinator)
3) i saw a lot of AT and API stuff on internet. i understand that API mode for multiple nodes, AT mode for p2p nodes. i know i will use API mode. but if i dont use arduino on nodes, how can i understand which data comes from which node ? and which sensor on the node ?
4) after zigbee installation, i will change it with ipv6 (6LowPAN). is there anyone that using arduino on 6LowPAN ? (i'm asking this for future questions :D ).
i searched a lot but i couldn't clearify there questions. i have never worked with RF stuff. but i'm not bad on programming (i did these project using just wires and a gateway, but there are billions of cable and i dont like this mess. also i want to improve my skills ).