Hi,
The battery runs in slave mode normally (YOu can read out the Charge, curent load, runtime at the current load) but if the battery has an Alarm it Switches over to master mode once every 10 seconds and sends the Status to the "Alarm slave address".
I'd rather stick with atmel mega if possible. I'd don't have much experience with the atxmega parts. SMD is not really a problem the board will be produces by a professional Company (I just Need to Hand solder the prototypes), The biggest problem is my experience and the time Frame. We Need a working prottype by sommer which wouldn't be too bad if the Hardware was already defined (we know we Need a compressor. battery, liquid pump, several pressure sensors, Radio module etc). Nut we're still screqing about with various compressors/liquid pumps and what we're pumping is quite nasty (corrosive).
Regards
Ian Dobson
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