Does BLE save much power if connection is always active?

[diode]

I have a use case where sensors on a BLE peripheral need to push notifications to a BLE central indeterministically. So it needs to keep the connection always on. The notification latency should also be low enough (maybe ~ 30ms or less), which sets requirement for connection interval. But the data to be sent are just a few bytes each.

I am wondering how the power consumption of this case is compared against Bluetooth Classic (e.g., SPP). I feel the argument favoring BLE in terms of power consumption seemed to be that BLE could sleep a lot. But in my case BLE doesn't really sleep.

[Øyvind Karlsen]

Hi,

Have a look at the online power profiler to get an idea of what kind of power consumption you will see. It will at any rate be more efficient than Bluetooth Classic, since it does still sleep quite a lot.

Best regards,

Øyvind