Reply To: Transfer file from SD card to iOS/Android via bluetooth

http://www.dfrobot.com/product-1073.html  TEL0073 Xbee TH BLUETOOTH 4.0  using Ti’s CC2540.  Digikey 1738-1014-ND‎

Seems to me there is a critical power issue;  how can a powered BT

http://www.dfrobot.com/product-1073.html  TEL0073 Xbee TH BLUETOOTH 4.0  using Ti’s CC2540.  Digikey 1738-1014-ND‎

Seems to me there is a critical power issue;  how can a powered BT LE sleeping device plugged into a Mayfly,   wake a sleeping Mayfly once a remote BT LE beacon (cell phone) has been detected.  For the TEL0073 there is a mapping to an Xbee Socket Pins (Xbee9/D23,  Xbee12/D19 or  Xbee16/D20) that might work.

Ti’s CC2540 suggests sleep current is in the low 10’s uA (but not sure if this is monitoring for a beacon while asleep) .

BT LE 5.0 has 4 x longer reach at reduced data, not sure what other benefits it would have to a modular sensors configuration.

I haven’t had time to dig further into TEL0073 or HM-19. The Tel0073 looks attractive for simplicity of plugging into the Xbee socket.