# Prepare for power measurement
Source: [https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html](https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html)
## Set up the environment
Source: [https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html](https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html)
The QCC74x currents are measured in the following environment.
Table : Environment set-up
| **Hardware** | QCC74x development kit |
| --- | --- |
| **Environment** | Room temperature, regulated at 3.3, unless otherwise specified.
Measurements are taken within a shield room. |
| **Test instrument** | Nordic Power Profiler Kit II |
## Set up the hardware for VDD core 3.3V
Source: [https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html](https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html)
Follow the instructions to connect the QCC74x
development kit to a power analyzer.
1. Ensure the supply to VDD is set to 3.3V.
2. Set the Nordic Power Profiler Kit II to log data in Ampere Meter Mode.
3. Connect the QCC74x development kit and the Nordic Power Profiler
Kit II.
## **Set up the hardware for VDDIO (1.8V)**
Follow the instructions to connect the QCC74x development kit to a power
analyzer to measure VDDIO.
1. Select VDDIO as 1.8V.
2. Set the Nordic Power Profiler Kit II to log data in Ampere Meter Mode.
3. Connect the QCC74x development kit and the Nordic Power Profiler Kit
II.
## Set up the hardware for VDDIO (3.3 V)
Follow the instructions to connect the QCC74x development kit to a power
analyzer to measure VDDIO.
1. Select VDDIO as 3.3V.
2. Set the Nordic Power Profiler Kit II to log data in Ampere Meter Mode.
3. Connect the QCC74x development kit and the Nordic Power Profiler Kit
II.
## Connect the console
Source: [https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html](https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html)
1. To communicate with the QCC74x board, use a USB-C cable to connect
between J2 on the QCC74x development kit and a USB port on a Windows
PC.
2. Start a terminal application from the PC and select the lower port to connect using
the port setting: `2000000, 8, n, 1, no flow control`.
3. The serial terminal application displays initialization information and provides a
list of available commands.
## Build and flash the software
Source: [https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html](https://docs.qualcomm.com/doc/80-58740-3/topic/power-measurement.html)
To measure the power consumption on the QCC74x board, use the following
demos:
- Hostless mode: examples/pmu/wl\_ble\_lp
- Hosted/Network Co-Processor (NCP) mode:
example/wifi\_spi\_wifi
To build and install wl\_ble\_lp, do the following:
1. Add precompiled binaries make, cmake and riscv64 files from the QCCSDK-QCC74x to the
PATH environment variable.
If the QCC74x\_SDK is downloaded to
C:\Downloads\QCCSDK-QCC74x, set the PATH as
follows:
set %PATH%=%PATH%: C:\Downloads\QCCSDK-QCC74x\tools\make
set %PATH%=%PATH%: C:\Downloads\QCCSDK-QCC74x\tools\cmake\bin
set %PATH%=%PATH%: C:\Downloads\QCCSDK-QCC74x\toolchain\windows_x86_64\bin Copy to clipboard
2. Navigate to the location of wl\_ble\_lp, build and flash the images using the commands
below.
cd QCCSDK-QCC74x\examples\pmu\wl_ble_lp
make
make flash COMX=COMYY // where COMYY is the COM_PORT example: COM24Copy to clipboard
The build steps for the wifi\_spi\_wifi demo is similar to the
wl\_ble\_lp demo.
For details on the build and flash instructions, refer to QCC74x
Programming Guide (80-58740-1).
Last Published: Feb 19, 2025
[Next Topic
Hostless mode power consumption using the command line](https://docs.qualcomm.com/bundle/publicresource/80-58740-3/topics/power-measurement-use-cases.md)