I’m trying to build a (simple) wireless sensor system using xbee but i’m having some bad experiences… I bought some xbee S2 modules: one module (end device) has a sensor and sends some data 4 times a day to a local module (coordinator) connected to a G120HDR and a cellular radio module, that send that data to a web server. Everytying is battery powered so i has hopping that i could put xbee to cycle sleep and disconnect G120 between sleeps.
After spending 100$ on xbee hardware i realise that S2 series always need a waked up coordinator, thus wasting power (doesn’t make sense having a coordinator awake 24h whe data is sent 4 times a day).
Someone told me that i should use S1 series because there is no coordinator and every node can sleep, but before i spend 100$ more i would like to know if somewone has used successfully S1 series with gadgeteer. I was thinking about have all xbee sleeping and when they wake up, the one with G120 attached could wake it (from deepsleep), send GSM message and get back to sleep.
Am i asking to much?