Power consumption of central mode

RE: Power consumption of central mode

chjoon — Mon, 05 Jun 2017 20:26:21 GMT

Thank you so much Stian! It is very helpful to estimate power in our device.

RE: Power consumption of central mode

Stian Røed Hafskjold — Thu, 01 Jun 2017 12:23:01 GMT

For central connection mode, you can use the peripheral connection numbers in the online power profiler. The difference is that TX and RX are switched.

For scanner mode it highly depends on the duty cycle of the scanning. The RX run current in BLE mode is about 7 mA. So if you have a 50% duty cycle you will get an average current of 3.5 mA

For your scenario, lets say you are scanning 10% of the time, for 14 hours, and in connection the remaining 10. And we assume a connection interval of 1 second. The calculation would be something like this:

Scanning: 7mA * 0.1 = 700 µA
Connection (from power profiler): 6.3 µA

700 * (10/24) + 6.3 * (14/24) = 295 µA in average

(TX power: 0dBm, voltage: 3V)

RE: Power consumption of central mode

chjoon — Tue, 30 May 2017 13:23:28 GMT

Thank you for helping me. Could you give me estimations in both conditions. And finally I would like to have power consumption for 24 hrs when 10 hrs in connection + 14 hrs in scanning per day.

RE: Power consumption of central mode

chjoon — Tue, 23 May 2017 13:30:18 GMT

Thank you for helping me. Could you give me estimations in both conditions. And finally I would like to have power consumption for 24 hrs when 10 hrs in connection + 14 hrs in scanning per day.

RE: Power consumption of central mode

Stian Røed Hafskjold — Tue, 23 May 2017 08:37:28 GMT

The power profiler only covers the most common use cases. If you want to estimate power consumption in central mode, I can give you some numbers. Are you looking for consumption during scanning or in connection?