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Filtered on: makezine.com > showing 2 comments covering 100 days


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GATT services and characteristics


In contrast with ?classic? #Bluetooth ?where there are a whole range of protocols?with Bluetooth LE (#BLE ) there is only one protocol at the top and it is #GATT (Generic Attribute).

The actual functionality of a BLE device is implemented by means of attributes which can be read, written, or enabled for notification/indication, depending on the attribute type.

&Rob 2014-05-05  
Reverse Engineering the Estimote


#Estimote are advertising a range of around 230 feet (about 70 meters) for their beacons. However testing puts the range much less, at somewhere around 130 feet (about 40 meters) out of the box, with highly variable precision. As far as I can tell you also shouldn?t rely on the proximity measurements at all as, at least from my own testing, these proximity measurements vary rapidly?presumably due to radio interference.

They?re also predicting a battery life of up to 2 years. However our beacon arrived at 55 percent charge, and it is now at 33 percent after just a month, so that seems somewhat of an optimistic prediction?and makes that sealed enclosure more of a liability than an asset.

&Rob 2014-05-05  


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