Exercise 1 – Enabling Matter ICD and measuring its power consumption
The nRF Connect SDK provides multiple Matter samples that are power-optimized and use Matter ICDs by default. However, in this exercise you will use the Matter Template sample from the nRF Connect SDK as a starting point. That sample is not power-optimized and does not use Matter ICD by default. Your goal will be to optimize it, test various ICD configurations and measure the device’s power consumption using Nordic Power Profiler Kit II (PPK II).
This exercise requires the Nordic Power Profiler Kit II (PPK2) to complete some of the steps. If you don’t have the PPK2, you can still go through the exercise, but you won’t be able to perform the power consumption measurement steps.
Exercise steps
1. Get the base code for this exercise.
In Visual Studio Code, in the WELCOME panel, select Open an existing application, navigate to the GitHub repository for the course and open the l4/l4_e1 directory. The application should appear under the APPLICATIONS panel.
This application is a copy of the Matter Template sample, with added instructions for where to input the code snippets from this exercise.
2. Enable ICD SIT using the ZAP Tool.
2.1 In Visual Studio Code, in the APPLICATIONS panel, right click on the application and select “Start New Terminal”, select the nRF Connect SDK version and corresponding toolchain version. This will open a terminal in your sample directory.
Run the ZAP Tool using the following command:
Copy
westzap-gui
Terminal command
2.2 Click on the Endpoint 0 listed in the side panel on the left side of the window.
2.3 In the search field, type in ICD to find the ICD Management cluster. Once found enable the Server role, using the check box.
2.4 Click on the gear icon to see the ICD Management details, and make sure the mandatory attributes presented in the following picture are enabled:
2.5 Save the configuration by clicking File->Save on the top bar and exit the application.
2.6 Generate the code based on the .zap file by invoking the following command in the VS Code terminal:
Copy
westzap-generate
Terminal command
3. Enable ICD SIT and power-optimizations in the application
All the required modifications in this step will be done in the prj_release.conf file. That is the variant of a typical sample’s prj.conf file that has debug features and logs disabled to reduce the power consumption.
3.1 Disable LEDs and watchdog to reduce the power consumption.
Add the following configurations to the prj_release.conf file:
The required configuration of the OpenThread device role is MTD. This is configured by setting the CONFIG_OPENTHREAD_NORDIC_LIBRARY_MTD=y and CONFIG_OPENTHREAD_MTD=y Kconfigs in the prj_release.conf file.
3.6 Change the default configuration of the ICD parameters.
By default the ICD SIT uses the following values:
Slow Polling Interval – 2.5 s
Fast Polling Interval – 500 ms
Idle Mode Duration – 120 s
Active Mode Duration – 300 ms
Active Mode Threshold – 0 s
Change the configuration, by setting the Slow Polling Interval to 1 s, Fast Polling Interval to 200 ms and Idle Mode Duration to 30 s. Add the following configuration to the prj_release.conf file:
If you get an error like “The container name “/otbr” is already in use by container…, run the following commands
sudo docker kill otbr
sudo ip -6 route del "fd11:22::/64" dev otbr0 via "fd11:db8:1::2"
sudo ip link set dev otbr0 down
sudo docker network rm otbr
5.1.2 Open the http://localhost:8080/ address in a web browser to get access to the OpenThread Border Router graphical user interface.
5.1.3 Navigate to the Form tab from the side panel and make sure that all the inserted data is the same as in the following picture. Then press the FORM button to request from the OpenThread Border Router to form a Thread network and become a Thread leader.
5.1.4 Open a new command-line terminal and check the status of the Thread node running inside the Docker:
Copy
sudodockerexec-itotbrsh-c"sudo ot-ctl state"
Terminal command
The output should be the following:
leaderDone
Terminal
Proceed to step 6.
6. Create power consumption measurement setup using the PPK II.
6.1 Connect the Power Profiler Kit II to the computer using a micro-USB cable using the USB DATA/POWER port on the device.
6.2 Connect the pins of the Power Profiler Kit II to the VDD nRF CURRENT MEASURE set of pins on the DK:
Connect the GND pin to the GND pin of the set on the DK.
Connect the VOUT pin to the middle pin of the set. The pin is marked with ↓ on the DK.
Connect the VIN pin to the leftmost pin of the set. The pin is marked with ↑ on the DK.
7.1 Open a new command-line terminal and run the downloaded binary file you obtained in the previous exercise using the following command:
With PC:
./chip-tool_x64 interactive start
With Raspberry Pi:
./chip-tool_arm64 interactive start
7.2 Commission the device to the network.
7.2.1 Make sure that Matter advertising over Bluetooth LE is running.
The following logs should be visible in the device serial port:
I: 730208 [DL]CHIPoBLE advertising startedI: 730212 [DL]NFC Tag emulation started
Terminal
Note that the Matter advertising over Bluetooth LE is automatically started for the Matter Template sample, but it timeouts after 1 hour. If the advertising timed out, press BUTTON0 on the Matter device to start it again.
7.2.2 Return to the terminal window running the CHIP Tool application.
Start the commissioning process by running the following command and fill the <thread dataset> argument with your Thread dataset that was obtained in Lesson 2 Exercise 1 and stored on your computer. Replace <your_selected_node_id> with a random node ID that has not been used in other exercises, e.g 5. This same number will be used when sending commands to the device via CHIP Tool.
7.1 Open a new command line terminal and run the downloaded binary file obtained in the previous exercise using the following command:
With PC:
./chip-tool_x64 interactive start
With Raspberry Pi:
./chip-tool_arm64 interactive start
7.2 Commission the device to the network.
7.2.1 Press BUTTON0 on the Matter device to start Matter advertising over Bluetooth LE.
The following logs should be visible in the device serial port:
I: 730208 [DL]CHIPoBLE advertising startedI: 730212 [DL]NFC Tag emulation started
Terminal
7.2.2 Return to the terminal window running the CHIP Tool application.
Run the following command and fill the <wifi_ssid> and <wifi_password> arguments with your Wi-Fi network data.
Replace <your_selected_node_id> with a random node ID that has not been used in other exercises, e.g 5. This same number will be used when sending commands to the device via CHIP Tool.
In the Power Profiler application’s window the commissioning process should be visible and similar to what is presented in the following image:
7.3 Measure the power consumed during a single Slow Polling period.
7.3.1 Get measurement values using markers in Power Profiler tool.
Wait some time after the commissioning ends for the power consumption chart to stabilize. Stop the capture and use markers to measure the time between two regular current peaks. The time between them should be equal to 1 s, as configured in step 3.4.
The sleep current between the current peaks is expected to be around 2.37 uA and the charge consumed during the single polling period is expected to be around 12 uC, what was presented in the following picture:
7.3.3 Configure the Matter ICD settings in a way consistent with the values used in step 3.4, as presented in the following picture:
7.3.4 Hover with your mouse’s cursor on the Data Poll in a displayed chart to read the charge of it, as presented in the following picture:
7.3.5 Hover with your mouse’s cursor on the Sleep area in a displayed chart to read the charge of it, as presented in the following picture:
7.3.6 Sum the two values read in steps 7.3.5 and 7.3.4. The summarized consumed charge during a single poll period is around 12.2 uC, which is a very close value to the 11.93 uC measured using Power Profiler tool.
7.4 Subscribe to the NodeLabel attribute from the BasicInformation cluster to trigger sending regular Matter data reports.
7.4.1 Open the terminal window running the CHIP Tool application
7.4.2 Learn the command usage, by invoking the following commands:
Copy
basicinformationsubscribe
Terminal command
and
Copy
basicinformationsubscribenode-label
Terminal command
7.4.2 Subscribe to the NodeLabel attribute value, by invoking the following command:
The selected max-interval value is equal to 30 seconds, as was configured in step 3.4
7.5 Measure the power consumed during a single Idle Mode Duration period.
7.5.1 Get measurement values using markers in Power Profiler tool.
Wait more than 30 s to capture at least two Matter data reports. Stop the capture and use markers to measure the time between two wider current peaks, visible among smaller ones that are Thread data pools. The time between them should be equal to 30 s, as configured in step 3.4.
The charge consumed during the single subscription period is expected to be around 450 uC, what was presented in the following picture:
7.5.2 In the Online Power Profiler for Matter over Thread configure the Operating Time to be equal to 30 s:
7.5.3 Read the Total consumption over time listed in the General section. The value is equal to 459.5 uCwhich is a very close value to the 450 uC measured using Power Profiler tool.
8. Enable ICD LIT using the ZAP Tool
8.1 In Visual Studio Code, in the WELCOME panel, select “Open terminal”. This should open a terminal in your sample directory. If not, navigate to your sample directory before proceeding.
Run the ZAP Tool using the following command:
Copy
westzap-gui
Terminal command
8.2 Click on the Endpoint 0 listed in the side panel on the left side of the window.
8.3 In the search field type in ICD to find ICD Management cluster. Once found, click on the gear icon to see the ICD Management details.
8.4 In the Features tab enable the CIP, UAT and LITS features that are mandatory for the ICD LIT device type, as presented in the following picture:
8.5 Make sure that all required commands are enabled, as presented in the following picture:
8.6 Make sure that all required attributes are enabled, as presented in the following picture:
8.7 Save the configuration by clicking File->Save on the top bar and exit the application.
8.8 Generate the code based on the .zap file by invoking the following command in the VS Code terminal:
Copy
westzap-generate
Terminal command
9. Enable ICD LIT in the application
All the required modifications in this point will be applicable to the prj_release.conf file.
9.1 Enable ICD LIT support, by adding the following configuration to the prj_release.conf file:
9.2 Change the default configuration of ICD parameters. By default the ICD LIT uses the following values:
Slow Polling Interval – 300 s
Fast Polling Interval – 500 ms
Idle Mode Duration – 300 s
Active Mode Duration – 300 ms
Active Mode Threshold – 5 s
To learn how to change the configuration, let’s set the Slow Polling Interval to 60 s, Fast Polling Interval to 500 ms, Idle Mode Duration to 60 s and Active Mode Threshold to 5 s.
Comment out the lines added in step 3.5, and add the following lines in the prj_release.conf file:
11.1 Open a new command-line terminal and run the downloaded binary file you obtained in the previous exercise using the following command:
With PC:
./chip-tool_x64 interactive start
With Raspberry Pi:
./chip-tool_arm64 interactive start
11.2 Commission the device to the network.
11.2.1 Make sure that Matter advertising over Bluetooth LE is running.
The following logs should be visible in the device serial port:
I: 730208 [DL]CHIPoBLE advertising startedI: 730212 [DL]NFC Tag emulation started
Terminal
Note that the Matter advertising over Bluetooth LE is automatically started for the Matter Template sample, but it timeouts after 1 hour. If the advertising timed out, press BUTTON0 on the Matter device to start it again.
11.2.2 Return to the terminal window running the CHIP Tool application.
Start the commissioning process by running the following command and fill the <thread dataset> argument with your Thread dataset that was obtained in Lesson 2 Exercise 1 and stored on your computer. Replace <your_selected_node_id> with a random node ID that has not been used in other exercises, e.g 6. This same number will be used when sending commands to the device via CHIP Tool.
Note that the command is different than it was in the previous steps and exercises, as it includes an additional icd-registration true flag. This makes the CHIP Tool automatically register as an ICD client of the nRF Matter device that is required for testing ICD LIT.
Ensure CHIP Tool is still running. If not:
11.1 Open a new command line terminal and run the downloaded binary file obtained in the previous exercise using the following command:
With PC:
./chip-tool_x64 interactive start
With Raspberry Pi:
./chip-tool_arm64 interactive start
11.2 Commission the device to the network.
11.2.1 Press BUTTON0 on the Matter device to start Matter advertising over Bluetooth LE.
The following logs should be visible in the device serial port:
I: 730208 [DL]CHIPoBLE advertising startedI: 730212 [DL]NFC Tag emulation started
Terminal
11.2.2 Return to the terminal window running the CHIP Tool application.
Run the following command and fill the <wifi_ssid> and <wifi_password> arguments with your Wi-Fi network data.
Replace <your_selected_node_id> with a random node ID that has not been used in other exercises, e.g 6. This same number will be used when sending commands to the device via CHIP Tool.
Note that the command is different than it was in the previous steps and exercises, as it includes an additional icd-registration true flag. This makes the CHIP Tool automatically register as an ICD client of the nRF Matter device that is required for testing ICD LIT.
11.2.3 Subscribe to the NodeLabel attribute value, by invoking the following command:
The selected max-interval value is equal to 60 seconds, as was configured in step 9.2
11.3 Measure the power consumed during a single Idle Mode Duration period.
11.3.1 Get measurement values using markers in Power Profiler tool.
Wait more than 60 s after commissioning is completed to capture at least two Matter data reports. Stop the capture and use markers to measure the time between two group of current peaks. The time between them should be equal to 60 s, as it was configured in the step 9.2.
The charge consumed during the single subscription period is expected to be around 350 uC, what was presented in the following picture:
Note that there is a group of current peaks visible while sending a Matter data report, not a single peak, as it was for ICD SIT. This is a result of using a non-zero Active Mode Threshold value. The Matter device keeps using Fast Polling for 5 s after sending the Matter data report, which is visible as a group of several short current peaks.
11.3.2 In the Online Power Profiler for Matter over Thread configure the Matter ICD settings in a way consistent with the values used in step 9.2, as presented in the following picture:
11.3.3 In the Online Power Profiler for Matter over Thread configure the Operating Time to be equal to 70 s.
11.3.4 Read the Total consumption over time listed in the General section. The value is equal to 380.8 uC which is a close value to the 346 uC measured using Power Profiler tool.
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•Matter over Thread support for nRF54LM20A and nRF54LM20B SoCs. •Matter over Wi-Fi® support for nRF54LM20A combined with the nRF7002-EB II shield. •Released the Matter Cluster Editor app v1.0.1 and Matter Quick Start app v1.1.0.
MCUboot & Partition Manager
•Single-Slot DFU and RAM Load mode are both promoted to fully supported •Partition Manager is officially deprecated in favor of Zephyr's devicetree-based partitioning.