An example showing the use of CHIP on the Linux. The document will describe how to build and run CHIP Linux Energy Management Example on Raspberry Pi. This doc is tested on Ubuntu for Raspberry Pi Server 20.04 LTS (aarch64) and Ubuntu for Raspberry Pi Desktop 20.10 (aarch64)
To cross-compile this example on x64 host and run on NXP i.MX 8M Mini EVK, see the associated README document for details.
Install tool chain
$ sudo apt-get install git gcc g++ python pkg-config libssl-dev libdbus-1-dev libglib2.0-dev ninja-build python3-venv python3-dev unzip
Build the example application:
$ cd ~/connectedhomeip/examples/energy-management-app/linux $ git submodule update --init $ source third_party/connectedhomeip/scripts/activate.sh $ gn gen out/debug $ ninja -C out/debug
To delete generated executable, libraries and object files use:
$ cd ~/connectedhomeip/examples/energy-management-app/linux $ rm -rf out/
Build the example with pigweed RPC
$ cd ~/connectedhomeip/examples/energy-management-app/linux
$ git submodule update --init
$ source third_party/connectedhomeip/scripts/activate.sh
$ gn gen out/debug --args='import("//with_pw_rpc.gni")'
$ ninja -C out/debug
--wifi
Enables WiFi management feature. Required for WiFi commissioning.
--thread
Enables Thread management feature, requires ot-br-posix dbus daemon running. Required for Thread commissioning.
--ble-device <interface id>
Use specific bluetooth interface for BLE advertisement and connections.
interface id: the number after hci when listing BLE interfaces by hciconfig command, for example, --ble-device 1 means using hci1 interface. Default: 0.
--application <evse | water-heater>
Emulate either an EVSE or Water Heater example.
--featureSet <feature map for Device Energy Management e.g. 0x7a>
Sets the run-time FeatureMap value for the Device Energy Management cluster. This allows the DEM cluster to support PFR or SFR so that the full range of TC_DEM_2.x test cases can be exercised with this application.
See the test-runner headers in the respective test script in src/python_testing/TC_DEM_2.x.py which have recommended values to use.
If you want to test Echo protocol, please enable Echo handler
gn gen out/debug --args='chip_app_use_echo=true' ninja -C out/debug
Prerequisites
pi-bluetooth via APT.Building
Follow Building section of this document.
Running
[Optional] Plug USB Bluetooth dongle
Plug USB Bluetooth dongle and find its bluetooth device number. The number after hci is the bluetooth device number, 1 in this example.
$ hciconfig
hci1: Type: Primary Bus: USB
BD Address: 00:1A:7D:AA:BB:CC ACL MTU: 310:10 SCO MTU: 64:8
UP RUNNING PSCAN ISCAN
RX bytes:20942 acl:1023 sco:0 events:1140 errors:0
TX bytes:16559 acl:1011 sco:0 commands:121 errors:0
hci0: Type: Primary Bus: UART
BD Address: B8:27:EB:AA:BB:CC ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING PSCAN ISCAN
RX bytes:8609495 acl:14 sco:0 events:217484 errors:0
TX bytes:92185 acl:20 sco:0 commands:5259 errors:0
Run Linux Energy Management Example App
$ cd ~/connectedhomeip/examples/energy-management-app/linux $ sudo out/debug/chip-energy-management-app --ble-device [bluetooth device number] # In this example, the device we want to use is hci1 $ sudo out/debug/chip-energy-management-app --ble-device 1
Test the device using ChipDeviceController on your laptop / workstation etc.
Device tracing is available to analyze the device performance. To turn on tracing, build with RPC enabled. See Building with RPC enabled.
Obtain tracing json file.
$ ./{PIGWEED_REPO}/pw_trace_tokenized/py/pw_trace_tokenized/get_trace.py -s localhost:33000 \
-o {OUTPUT_FILE} -t {ELF_FILE} {PIGWEED_REPO}/pw_trace_tokenized/pw_trace_protos/trace_rpc.proto
When you want to test this cluster you can use chip-repl or chip-tool by hand. CHIP-REPL is slightly easier to interact with when dealing with some of the complex structures.
There are several test scripts provided for EVSE (in src/python_testing):
TC_EEVSE_2_2: This validates the primary functionalityTC_EEVSE_2_3: This validates Get/Set/Clear target commandsTC_EEVSE_2_4: This validates FaultsTC_EEVSE_2_5: This validates EVSE diagnostic command (optional)TC_EEVSE_2_6: This validates EVSE Forecast Adjustment with State Forecast Reporting feature functionalityTC_EEVSE_2_7: This validates EVSE Constraints-based Adjustment with Power Forecast Reporting feature functionalityTC_EEVSE_2_8: This validates EVSE Constraints-based Adjustment with State Forecast Reporting feature functionalityTC_EEVSE_2_9: This validates EVSE Power or State Forecast Reporting feature functionalityThese scripts require the use of Test Event Triggers via the GeneralDiagnostics cluster on Endpoint 0. This requires an enableKey (16 bytes) and a set of reserved int64_t test event trigger codes.
By default the test event support is not enabled, and when compiling the example app you need to add chip_enable_energy_evse_trigger=true to the gn args.
$ gn gen out/debug --args='chip_enable_energy_evse_trigger=true'
$ ninja -C out/debug
Once the application is built you also need to tell it at runtime what the chosen enable key is using the --enable-key command line option.
$ ./chip-energy-management-app --enable-key 000102030405060708090a0b0c0d0e0f --application evse
From the top-level of the connectedhomeip repo type:
Start the chip-energy-management-app:
rm -f evse.bin; out/debug/chip-energy-management-app --enable-key 000102030405060708090a0b0c0d0e0f --KVS evse.bin --featureSet $featureSet --application evse
where the $featureSet depends on the test being run:
TC_DEM_2_2.py: 0x01 // PA TC_DEM_2_3.py: 0x3b // STA, PAU, FA, CON + (PFR | SFR) TC_DEM_2_4.py: 0x3b // STA, PAU, FA, CON + (PFR | SFR) TC_DEM_2_5.py: 0x3b // STA, PAU, FA, CON + PFR TC_DEM_2_6.py: 0x3d // STA, PAU, FA, CON + SFR TC_DEM_2_7.py: 0x3b // STA, PAU, FA, CON + PFR TC_DEM_2_8.py: 0x3d // STA, PAU, FA, CON + SFR TC_DEM_2_9.py: 0x3f // STA, PAU, FA, CON + PFR + SFR
where
PA - DEM.S.F00(PowerAdjustment) PFR - DEM.S.F01(PowerForecastReporting) SFR - DEM.S.F02(StateForecastReporting) STA - DEM.S.F03(StartTimeAdjustment) PAU - DEM.S.F04(Pausable) FA - DEM.S.F05(ForecastAdjustment) CON -DEM.S.F06(ConstraintBasedAdjustment)
Then run the test:
$ python src/python_testing/TC_EEVSE_2_2.py --endpoint 1 -m on-network -n 1234 -p 20202021 -d 3840 --hex-arg enableKey:000102030405060708090a0b0c0d0e0f
--endpoint 1 must be used with the example, since the EVSE cluster is on endpoint 1. The --hex-arg enableKey:<key> value must match the --enable-key <key> used on chip-energy-management-app args.The chip-energy-management-app will need to be stopped before running each test script as each test commissions the chip-energy-management-app in the first step. That is also why the evse.bin is deleted before running chip-energy-management-app as this is where the app stores the matter persistent data (e.g. fabric info).
$ ./build_python.sh -i <path_to_out_folder>
$ source <path_to_out_folder>/bin/activate
$ ./chip-energy-management-app --enable-key 000102030405060708090a0b0c0d0e0f --application evse
$ chip-repl
devCtrl.CommissionOnNetwork(1234,20202021) # Commission with NodeID 1234 Established secure session with Device Commissioning complete Out[2]: <chip.native.PyChipError object at 0x7f2432b16140>
# Read from NodeID 1234, Endpoint 1, all attributes on EnergyEvse cluster await devCtrl.ReadAttribute(1234,[(1, chip.clusters.EnergyEvse)])
{
│ 1: {
│ │ <class 'chip.clusters.Objects.EnergyEvse'>: {
│ │ │ <class 'chip.clusters.Attribute.DataVersion'>: 3790455237,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.ChargingEnabledUntil'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.FaultState'>: <FaultStateEnum.kNoError: 0>,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NextChargeStartTime'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.StateOfCharge'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.MaximumChargeCurrent'>: 0,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.ApproximateEVEfficiency'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.BatteryCapacity'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.AcceptedCommandList'>: [
... │ │ ],
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.MinimumChargeCurrent'>: 6000,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NextChargeTargetSoC'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.SessionDuration'>: 758415333,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NumberOfWeeklyTargets'>: 0,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.FeatureMap'>: 1,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.GeneratedCommandList'>: [
...
│ │ │ ],
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.State'>: <StateEnum.kNotPluggedIn: 0>,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.SessionID'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.SessionEnergyCharged'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.VehicleID'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NextChargeRequiredEnergy'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.SessionEnergyDischarged'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.AttributeList'>: [
... │ │ ],
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NextChargeTargetTime'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.CircuitCapacity'>: 0,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.DischargingEnabledUntil'>: Null,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.SupplyState'>: <SupplyStateEnum.kDisabled: 0>,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.RandomizationDelayWindow'>: 600,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.MaximumDischargeCurrent'>: 0,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.NumberOfDailyTargets'>: 1,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.UserMaximumChargeCurrent'>: 80000,
│ │ │ <class 'chip.clusters.Objects.EnergyEvse.Attributes.ClusterRevision'>: 2
│ │ }
│ }
}
reportingTimingParams = (3, 60) # MinInterval = 3s, MaxInterval = 60s subscription = await devCtrl.ReadAttribute(1234,[(1, chip.clusters.EnergyEvse)], reportInterval=reportingTimingParams)
EnableCharging command which lasts for 60 seconds The EnableCharging takes an optional chargingEnabledUntil parameter which allows the charger to automatically disable itself at some preset time in the future. Note that it uses Epoch_s (which is from Jan 1 2000) which is a uint32_t in seconds.from datetime import datetime, timezone, timedelta epoch_end = int((datetime.now(tz=timezone.utc) + timedelta(seconds=60) - datetime(2000, 1, 1, 0, 0, 0, 0, timezone.utc)).total_seconds()) await devCtrl.SendCommand(1234, 1, chip.clusters.EnergyEvse.Commands.EnableCharging(chargingEnabledUntil=epoch_end,minimumChargeCurrent=2000,maximumChargeCurrent=25000),timedRequestTimeoutMs=3000)
The output should look like:
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.SupplyState'>,
│ 'Value': <SupplyStateEnum.kChargingEnabled: 1>
}
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.MinimumChargeCurrent'>,
│ 'Value': 2000
}
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.ChargingEnabledUntil'>,
│ 'Value': 758416066
}
After 60 seconds the charging should automatically become disabled:
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.SupplyState'>,
│ 'Value': <SupplyStateEnum.kDisabled: 0>
}
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.DischargingEnabledUntil'>,
│ 'Value': 0
}
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.MinimumChargeCurrent'>,
│ 'Value': 0
}
Attribute Changed:
{
│ 'Endpoint': 1,
│ 'Attribute': <class 'chip.clusters.Objects.EnergyEvse.Attributes.ChargingEnabledUntil'>,
│ 'Value': 0
}
Note that you can omit the chargingEnabledUntil argument and it will charge indefinitely.
If you haven't implemented a real EVSE but want to simulate plugging in an EV then you can use a few of the test event triggers to simulate these scenarios.
The test event triggers values can be found in: EnergyEvseTestEventTriggerHandler.h
EVConnected event)To send a test event trigger to the app, use the following commands (in chip-repl):
# send 1st event trigger to 'install' the EVSE on a 32A supply await devCtrl.SendCommand(1234, 0, chip.clusters.GeneralDiagnostics.Commands.TestEventTrigger(enableKey=bytes([b for b in range(16)]), eventTrigger=0x0099000000000000)) # send 2nd event trigger to plug the EV in await devCtrl.SendCommand(1234, 0, chip.clusters.GeneralDiagnostics.Commands.TestEventTrigger(enableKey=bytes([b for b in range(16)]), eventTrigger=0x0099000000000002))
Now send the enable charging command (omit the chargingEnabledUntil arg this time):
await devCtrl.SendCommand(1234, 1, chip.clusters.EnergyEvse.Commands.EnableCharging(minimumChargeCurrent=2000,maximumChargeCurrent=25000),timedRequestTimeoutMs=3000)
Now send the test event trigger to simulate the EV asking for demand:
# send 2nd event trigger to plug the EV in await devCtrl.SendCommand(1234, 0, chip.clusters.GeneralDiagnostics.Commands.TestEventTrigger(enableKey=bytes([b for b in range(16)]), eventTrigger=0x0099000000000004)) # Read the events await devCtrl.ReadEvent(1234,[(1, chip.clusters.EnergyEvse,1)])
[ │ EventReadResult( │ │ Header=EventHeader( │ │ │ EndpointId=1, │ │ │ ClusterId=153, │ │ │ EventId=0, │ │ │ EventNumber=65538, │ │ │ Priority=<EventPriority.INFO: 1>, │ │ │ Timestamp=1705102500069, │ │ │ TimestampType=<EventTimestampType.EPOCH: 1> │ │ ), │ │ Status=<Status.Success: 0>, │ │ Data=EVConnected( │ │ │ sessionID=0 │ │ ) │ ), │ EventReadResult( │ │ Header=EventHeader( │ │ │ EndpointId=1, │ │ │ ClusterId=153, │ │ │ EventId=2, │ │ │ EventNumber=65539, │ │ │ Priority=<EventPriority.INFO: 1>, │ │ │ Timestamp=1705102801764, │ │ │ TimestampType=<EventTimestampType.EPOCH: 1> │ │ ), │ │ Status=<Status.Success: 0>, │ │ Data=EnergyTransferStarted( │ │ │ sessionID=0, │ │ │ state=<StateEnum.kPluggedInCharging: 3>, │ │ │ maximumCurrent=25000 │ │ ) │ ) ]
EventNumber 65538 was sent when the vehicle was plugged in, and a new sessionID=0 was created.EnergyTransferStarted was sent in EventNumber 65539What happens when we unplug the vehicle?
await devCtrl.SendCommand(1234, 0, chip.clusters.GeneralDiagnostics.Commands.TestEventTrigger(enableKey=bytes([b for b in range(16)]), eventTrigger=0x0099000000000001))
When we re-read the events:
[ │ EventReadResult( │ │ Header=EventHeader( │ │ │ EndpointId=1, │ │ │ ClusterId=153, │ │ │ EventId=3, │ │ │ EventNumber=65540, │ │ │ Priority=<EventPriority.INFO: 1>, │ │ │ Timestamp=1705102996749, │ │ │ TimestampType=<EventTimestampType.EPOCH: 1> │ │ ), │ │ Status=<Status.Success: 0>, │ │ Data=EnergyTransferStopped( │ │ │ sessionID=0, │ │ │ state=<StateEnum.kPluggedInCharging: 3>, │ │ │ reason=<EnergyTransferStoppedReasonEnum.kOther: 2>, │ │ │ energyTransferred=0 │ │ ) │ ), │ EventReadResult( │ │ Header=EventHeader( │ │ │ EndpointId=1, │ │ │ ClusterId=153, │ │ │ EventId=1, │ │ │ EventNumber=65541, │ │ │ Priority=<EventPriority.INFO: 1>, │ │ │ Timestamp=1705102996749, │ │ │ TimestampType=<EventTimestampType.EPOCH: 1> │ │ ), │ │ Status=<Status.Success: 0>, │ │ Data=EVNotDetected( │ │ │ sessionID=0, │ │ │ state=<StateEnum.kPluggedInCharging: 3>, │ │ │ sessionDuration=0, │ │ │ sessionEnergyCharged=0, │ │ │ sessionEnergyDischarged=0 │ │ ) │ ) ]
In EventNumber 65540 we had an EnergyTransferStopped event with reason kOther.
This was a rather abrupt end to a charging session (normally we would see the EVSE or EV decide to stop charging), but this demonstrates the cable being pulled out without a graceful charging shutdown.
In EventNumber 65541 we had an EvNotDetected event showing that the state was kPluggedInCharging prior to the EV being not detected (normally in a graceful shutdown this would be kPluggedInNoDemand or kPluggedInDemand).