Hi,

Am about to start looking at integrating to the P25i Bluetooth printer, and 
just wondered about best practices especially around sessions and battery use. 
Basically, I guess once you pair the printer to the device, it consumes battery 
with the Bluetooth being turned on etc. Does opening a session make this worse? 
Or should a session be opened and closed just as needed?

As much as possible I need to know at all times if the printer is there, so 
also wondered how to translate these:

//add notification for accessory
    [[NSNotificationCenter defaultCenter] addObserver:self 
selector:@selector(_accessoryDidConnect:) 
name:EAAccessoryDidConnectNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self 
selector:@selector(_accessoryDidDisconnect:) 
name:EAAccessoryDidDisconnectNotification object:nil];

Dino
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