The Power Profiler app is a tool to communicate with the Power Profiler Kit II (PPK2), an affordable and flexible tool to obtain real-time current measurements of your designs.
The PPK measures current consumption for a connected Nordic Development Kit or any external board. It gives a detailed picture of the current profile for the user application.
The support for Power Profiler Kit (PPK1) has been deprecated since the Power Profiler app v4.0.0-beta1. The last application version to support PPK1 is v3.5.5 with nRF Connect for Desktop v4.4.0.
The Power Profiler app is installed from nRF Connect from Desktop. For detailed steps, see Installing nRF Connect for Desktop apps in the nRF Connect from Desktop documentation.
Read the Power Profiler app official documentation for information about its UI and features.
(The documentation is valid for PPK2. If you use the first version of the hardware, see the online documentation for PPK1).
See the app development pages for details on how to develop apps for the nRF Connect for Desktop framework.
Please report issues on the DevZone portal.
See the infos on contributing for details.
See the LICENSE file for details.
The app stores data in and reads data from *.ppk2 files. There are no
guarantees that the format will remain the same. But you can see in the source
code, that it currently is like this:
A ppk2 file is a zip compressed file, containing 3 files:
session.rawminimap.rawmetadata.json
Mandatory Data:
-
session.rawin class FileData- 4 bytes for current: decimal in μA
- 2 bytes for the digital channels: 2 bits per channel, LSB is digital
channel 1 (D8-D7-D6-D5-D4-D3-D2-D1). Conversion of the 8-bit digital
input to the 16-bit format is done in
the function
convertBits16
-
Minimap condensed data in FoldingBuffer#saveToFile
-
Metadata stored in
saveFileHandler(samples per second must be the same as supported by our app)
Important: No negative values are supported! Any values < 0.2 μA are interpreted as 0.
Final compression of the 3 files into ppk2 in
saveFileHandler.