Optimization of the current consumption of the Central device

[purgoufr]

Hello everybody,

I am using central device with SDK14.2 and S132.  

In a central application, the operation sequence is as follows:
* Buttons pressed and scan started
* Connect and LED on if the desired peripheral device is found
* Send a nus_data with 3 characters after connecting
* Disconnect and enter standby mode.

The process is successful but the current consumption is max 13mA during the connection. When entering Stanby mode, it consumes about 1.8uA of current (as it should be). Is there a way to reduce the current consumed during the scan start and connect times?

Note: The LED consumes 0.6uA.

[Stian Røed Hafskjold]

Hi, which chip are you using? If you are using nRF52832, 13mA seems reasonable for radio RX without DCDC enabled. If you enable DCDC you can get it down to about 6.5mA.

[purgoufr]

Yes I am using NRF51832 and you are absolutely right. Finally I obtained maksimum current consumption about 6.2mA. What I am wondering is, is this the lowest amount of consumption I can reach?

[Stian Røed Hafskjold]

Yes, if you are running radio the RX peak currents will be about 6.5mA @3V. The TX peak currents can be reduced if you reduce the TX power (dBm). If you increase the voltage the current will go down (but not the power (watt))