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.
I use S2 myself and a similar setup on the remote nodes that sleep. The coordinator is always on by default as it is connected to the home automation PC anyway, which is 24/7.
Would you not need an always on device anyway that is listening for the remotes when they wake up? A S2 module in receive mode is not using much power anyway.
Several years ago I built a NETMF project using the S1 modules. So, I can confirm that they will work with Gadgeteer. However, like Dave, I’m not sure I know how they would work like you have planned as I’ve never used them that way. In my project, both devices were always on. I don’t think NETMF/Gadgeteer will be a limiting factor, though.
Did you have any issue with S1? Just to antecipate any problems i may have…
Did you use any xbee library? There are not much examples for Xbee and gadgeteer.
From digikey site, RF200 starts from 34$, Xbee starts from 22$
From the specs RF200 has 24 pins, so they don’t fit into xbee socket, right? did you make a custom board?
One of the devices will be attached to a G120HDR, it is ok to use serialread to get data from the RF200?
Sorry for so much questions, but before i start digging on another devices/technology i need to know what am i facing…