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nutchayut
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OCPP.Core.Server/ControllerOCPP16.MeterValues.cs
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OCPP.Core.Server/ControllerOCPP16.MeterValues.cs
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/*
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* OCPP.Core - https://github.com/dallmann-consulting/OCPP.Core
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* Copyright (C) 2020-2021 dallmann consulting GmbH.
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* All Rights Reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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http://www.diva-portal.se/smash/get/diva2:838105/FULLTEXT01.pdf
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Measurand values Description
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Energy.Active.Import.Register Energy imported by EV (Wh of kWh)
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Power.Active.Import Instantaneous active power imported by EV (W or kW)
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Current.Import Instantaneous current flow to EV (A)
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Voltage AC RMS supply voltage (V)
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Temperature Temperature reading inside the charge point
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<cs:meterValuesRequest>
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<cs:connectorId>0</cs:connectorId>
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<cs:transactionId>170</cs:transactionId>
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<cs:values>
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<cs:timestamp>2014-12-03T10:52:59.410Z</cs:timestamp>
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<cs:value cs:measurand="Current.Import" cs:unit="Amp">41.384</cs:value>
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<cs:value cs:measurand="Voltage" cs:unit="Volt">226.0</cs:value>
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<cs:value cs:measurand="Power.Active.Import" cs:unit="W">7018</cs:value>
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<cs:value cs:measurand="Energy.Active.Import.Register" cs:unit="Wh">2662</cs:value>
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<cs:value cs:measurand="Temperature" cs:unit="Celsius">24</cs:value>
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</cs:values>
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</cs:meterValuesRequest>
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*/
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.Extensions.Logging;
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using Newtonsoft.Json;
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using OCPP.Core.Database;
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using OCPP.Core.Server.Messages_OCPP16;
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namespace OCPP.Core.Server
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{
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public partial class ControllerOCPP16
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{
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public string HandleMeterValues(OCPPMessage msgIn, OCPPMessage msgOut)
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{
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string errorCode = null;
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MeterValuesResponse meterValuesResponse = new MeterValuesResponse();
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int connectorId = -1;
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string msgMeterValue = string.Empty;
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try
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{
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Logger.LogTrace("Processing meter values...");
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MeterValuesRequest meterValueRequest = DeserializeMessage<MeterValuesRequest>(msgIn);
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Logger.LogTrace("MeterValues => Message deserialized");
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connectorId = meterValueRequest.ConnectorId;
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if (ChargePointStatus != null)
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{
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// Known charge station => process meter values
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double currentChargeKW = -1;
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double meterKWH = -1;
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DateTimeOffset? meterTime = null;
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double stateOfCharge = -1;
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foreach (MeterValue meterValue in meterValueRequest.MeterValue)
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{
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foreach (SampledValue sampleValue in meterValue.SampledValue)
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{
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Logger.LogTrace("MeterValues => Context={0} / Format={1} / Value={2} / Unit={3} / Location={4} / Measurand={5} / Phase={6}",
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sampleValue.Context, sampleValue.Format, sampleValue.Value, sampleValue.Unit, sampleValue.Location, sampleValue.Measurand, sampleValue.Phase);
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if (sampleValue.Measurand == SampledValueMeasurand.Power_Active_Import)
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{
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// current charging power
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if (double.TryParse(sampleValue.Value, NumberStyles.Float, CultureInfo.InvariantCulture, out currentChargeKW))
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{
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if (sampleValue.Unit == SampledValueUnit.W ||
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sampleValue.Unit == SampledValueUnit.VA ||
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sampleValue.Unit == SampledValueUnit.Var ||
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sampleValue.Unit == null)
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{
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Logger.LogTrace("MeterValues => Charging '{0:0.0}' W", currentChargeKW);
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// convert W => kW
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currentChargeKW = currentChargeKW / 1000;
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}
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else if (sampleValue.Unit == SampledValueUnit.KW ||
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sampleValue.Unit == SampledValueUnit.KVA ||
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sampleValue.Unit == SampledValueUnit.Kvar)
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{
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// already kW => OK
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Logger.LogTrace("MeterValues => Charging '{0:0.0}' kW", currentChargeKW);
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}
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else
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{
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Logger.LogWarning("MeterValues => Charging: unexpected unit: '{0}' (Value={1})", sampleValue.Unit, sampleValue.Value);
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}
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}
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else
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{
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Logger.LogError("MeterValues => Charging: invalid value '{0}' (Unit={1})", sampleValue.Value, sampleValue.Unit);
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}
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}
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else if (sampleValue.Measurand == SampledValueMeasurand.Energy_Active_Import_Register ||
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sampleValue.Measurand == null)
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{
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// charged amount of energy
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if (double.TryParse(sampleValue.Value, NumberStyles.Float, CultureInfo.InvariantCulture, out meterKWH))
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{
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if (sampleValue.Unit == SampledValueUnit.Wh ||
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sampleValue.Unit == SampledValueUnit.Varh ||
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sampleValue.Unit == null)
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{
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Logger.LogTrace("MeterValues => Value: '{0:0.0}' Wh", meterKWH);
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// convert Wh => kWh
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meterKWH = meterKWH / 1000;
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}
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else if (sampleValue.Unit == SampledValueUnit.KWh ||
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sampleValue.Unit == SampledValueUnit.Kvarh)
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{
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// already kWh => OK
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Logger.LogTrace("MeterValues => Value: '{0:0.0}' kWh", meterKWH);
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}
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else
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{
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Logger.LogWarning("MeterValues => Value: unexpected unit: '{0}' (Value={1})", sampleValue.Unit, sampleValue.Value);
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}
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meterTime = meterValue.Timestamp;
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}
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else
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{
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Logger.LogError("MeterValues => Value: invalid value '{0}' (Unit={1})", sampleValue.Value, sampleValue.Unit);
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}
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}
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else if (sampleValue.Measurand == SampledValueMeasurand.SoC)
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{
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// state of charge (battery status)
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if (double.TryParse(sampleValue.Value, NumberStyles.Float, CultureInfo.InvariantCulture, out stateOfCharge))
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{
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Logger.LogTrace("MeterValues => SoC: '{0:0.0}'%", stateOfCharge);
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}
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else
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{
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Logger.LogError("MeterValues => invalid value '{0}' (SoC)", sampleValue.Value);
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}
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}
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}
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}
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// write charging/meter data in chargepoint status
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if (connectorId > 0)
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{
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msgMeterValue = $"Meter (kWh): {meterKWH} | Charge (kW): {currentChargeKW} | SoC (%): {stateOfCharge}";
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if (meterKWH >= 0)
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{
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UpdateConnectorStatus(connectorId, null, null, meterKWH, meterTime);
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}
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if (currentChargeKW >= 0 || meterKWH >= 0 || stateOfCharge >= 0)
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{
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if (ChargePointStatus.OnlineConnectors.ContainsKey(connectorId))
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{
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OnlineConnectorStatus ocs = ChargePointStatus.OnlineConnectors[connectorId];
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if (currentChargeKW >= 0) ocs.ChargeRateKW = currentChargeKW;
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if (meterKWH >= 0) ocs.MeterKWH = meterKWH;
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if (stateOfCharge >= 0) ocs.SoC = stateOfCharge;
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}
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else
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{
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OnlineConnectorStatus ocs = new OnlineConnectorStatus();
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if (currentChargeKW >= 0) ocs.ChargeRateKW = currentChargeKW;
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if (meterKWH >= 0) ocs.MeterKWH = meterKWH;
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if (stateOfCharge >= 0) ocs.SoC = stateOfCharge;
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if (ChargePointStatus.OnlineConnectors.TryAdd(connectorId, ocs))
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{
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Logger.LogTrace("MeterValues => Set OnlineConnectorStatus for ChargePoint={0} / Connector={1} / Values: {2}", ChargePointStatus?.Id, connectorId, msgMeterValue);
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}
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else
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{
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Logger.LogError("MeterValues => Error adding new OnlineConnectorStatus for ChargePoint={0} / Connector={1} / Values: {2}", ChargePointStatus?.Id, connectorId, msgMeterValue);
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}
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}
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}
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}
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}
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else
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{
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// Unknown charge station
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errorCode = ErrorCodes.GenericError;
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}
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msgOut.JsonPayload = JsonConvert.SerializeObject(meterValuesResponse);
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Logger.LogTrace("MeterValues => Response serialized");
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}
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catch (Exception exp)
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{
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Logger.LogError(exp, "MeterValues => Exception: {0}", exp.Message);
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errorCode = ErrorCodes.InternalError;
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}
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WriteMessageLog(ChargePointStatus.Id, connectorId, msgIn.Action, msgMeterValue, errorCode);
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return errorCode;
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}
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}
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}
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