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charge_point_impl.cpp
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// SPDX-License-Identifier: Apache-2.0
// Copyright 2020 - 2023 Pionix GmbH and Contributors to EVerest
#include <thread>
#include <everest/logging.hpp>
#include <ocpp/v16/charge_point.hpp>
#include <ocpp/v16/charge_point_configuration.hpp>
#include <ocpp/v16/charge_point_impl.hpp>
#include <optional>
namespace ocpp {
namespace v16 {
const auto ISO15118_PNC_VENDOR_ID = "org.openchargealliance.iso15118pnc";
const auto CLIENT_CERTIFICATE_TIMER_INTERVAL = std::chrono::hours(12);
const auto V2G_CERTIFICATE_TIMER_INTERVAL = std::chrono::hours(12);
const auto OCSP_REQUEST_TIMER_INTERVAL = std::chrono::hours(12);
const auto INITIAL_CERTIFICATE_REQUESTS_DELAY = std::chrono::seconds(60);
const auto WEBSOCKET_INIT_DELAY = std::chrono::seconds(2);
const auto DEFAULT_MESSAGE_QUEUE_SIZE_THRESHOLD = 2E5;
ChargePointImpl::ChargePointImpl(const std::string& config, const fs::path& share_path,
const fs::path& user_config_path, const fs::path& database_path,
const fs::path& sql_init_path, const fs::path& message_log_path,
const std::shared_ptr<EvseSecurity> evse_security,
const std::optional<SecurityConfiguration> security_configuration) :
ocpp::ChargingStationBase(evse_security, security_configuration),
boot_notification_callerror(false),
initialized(false),
bootreason(BootReasonEnum::PowerUp),
connection_state(ChargePointConnectionState::Disconnected),
registration_status(RegistrationStatus::Pending),
diagnostics_status(DiagnosticsStatus::Idle),
firmware_status(FirmwareStatus::Idle),
log_status(UploadLogStatusEnumType::Idle),
message_log_path(message_log_path.string()), // .string() for compatibility with boost::filesystem
switch_security_profile_callback(nullptr) {
this->configuration = std::make_shared<ocpp::v16::ChargePointConfiguration>(config, share_path, user_config_path);
this->heartbeat_timer = std::make_unique<Everest::SteadyTimer>(&this->io_service, [this]() { this->heartbeat(); });
this->heartbeat_interval = this->configuration->getHeartbeatInterval();
this->database_handler =
std::make_shared<DatabaseHandler>(this->configuration->getChargePointId(), database_path, sql_init_path);
this->database_handler->open_db_connection(this->configuration->getNumberOfConnectors());
this->transaction_handler = std::make_unique<TransactionHandler>(this->configuration->getNumberOfConnectors());
this->external_notify = {v16::MessageType::StartTransactionResponse};
this->message_queue = this->create_message_queue();
auto log_formats = this->configuration->getLogMessagesFormat();
bool log_to_console = std::find(log_formats.begin(), log_formats.end(), "console") != log_formats.end();
bool detailed_log_to_console =
std::find(log_formats.begin(), log_formats.end(), "console_detailed") != log_formats.end();
bool log_to_file = std::find(log_formats.begin(), log_formats.end(), "log") != log_formats.end();
bool log_to_html = std::find(log_formats.begin(), log_formats.end(), "html") != log_formats.end();
bool log_security = std::find(log_formats.begin(), log_formats.end(), "security") != log_formats.end();
bool session_logging = std::find(log_formats.begin(), log_formats.end(), "session_logging") != log_formats.end();
this->logging = std::make_shared<ocpp::MessageLogging>(
this->configuration->getLogMessages(), this->message_log_path, DateTime().to_rfc3339(), log_to_console,
detailed_log_to_console, log_to_file, log_to_html, log_security, session_logging, nullptr);
this->boot_notification_timer =
std::make_unique<Everest::SteadyTimer>(&this->io_service, [this]() { this->boot_notification(); });
for (int32_t connector = 0; connector < this->configuration->getNumberOfConnectors() + 1; connector++) {
this->status_notification_timers.push_back(std::make_unique<Everest::SteadyTimer>(&this->io_service));
}
this->clock_aligned_meter_values_timer =
std::make_unique<ClockAlignedTimer>(&this->io_service, [this]() { this->clock_aligned_meter_values_sample(); });
this->client_certificate_timer = std::make_unique<Everest::SteadyTimer>(&this->io_service, [this]() {
EVLOG_info << "Checking if CSMS client certificate has expired";
int expiry_days_count = this->evse_security->get_leaf_expiry_days_count(
ocpp::CertificateSigningUseEnum::ChargingStationCertificate);
if (expiry_days_count < 30) {
EVLOG_info << "CSMS client certificate is invalid in " << expiry_days_count
<< " days. Requesting new certificate with certificate signing request";
this->sign_certificate(ocpp::CertificateSigningUseEnum::ChargingStationCertificate);
} else {
EVLOG_info << "CSMS client certificate is still valid.";
}
this->client_certificate_timer->interval(CLIENT_CERTIFICATE_TIMER_INTERVAL);
});
this->v2g_certificate_timer = std::make_unique<Everest::SteadyTimer>(&this->io_service, [this]() {
EVLOG_info << "Checking if V2GCertificate has expired";
int expiry_days_count =
this->evse_security->get_leaf_expiry_days_count(ocpp::CertificateSigningUseEnum::V2GCertificate);
if (expiry_days_count < 30) {
EVLOG_info << "V2GCertificate is invalid in " << expiry_days_count
<< " days. Requesting new certificate with certificate signing request";
this->data_transfer_pnc_sign_certificate();
} else {
EVLOG_info << "V2GCertificate is still valid.";
}
this->v2g_certificate_timer->interval(V2G_CERTIFICATE_TIMER_INTERVAL);
});
this->status = std::make_unique<ChargePointStates>(
[this](const int32_t connector, const ChargePointErrorCode errorCode, const ChargePointStatus status,
const ocpp::DateTime& timestamp, const std::optional<CiString<50>>& info,
const std::optional<CiString<255>>& vendor_id, const std::optional<CiString<50>>& vendor_error_code) {
this->status_notification_timers.at(connector)->stop();
this->status_notification_timers.at(connector)->timeout(
[this, connector, errorCode, status, timestamp, info, vendor_id, vendor_error_code]() {
this->status_notification(connector, errorCode, status, timestamp, info, vendor_id,
vendor_error_code);
},
std::chrono::seconds(this->configuration->getMinimumStatusDuration().value_or(0)));
});
for (int id = 0; id <= this->configuration->getNumberOfConnectors(); id++) {
this->connectors.insert(std::make_pair(id, std::make_shared<Connector>(id)));
}
this->smart_charging_handler = std::make_unique<SmartChargingHandler>(
this->connectors, this->database_handler,
this->configuration->getAllowChargingProfileWithoutStartSchedule().value_or(false));
// ISO15118 PnC handlers
if (this->configuration->getSupportedFeatureProfilesSet().count(SupportedFeatureProfiles::PnC)) {
this->data_transfer_pnc_callbacks[conversions::messagetype_to_string(MessageType::TriggerMessage)] =
[this](ocpp::Call<ocpp::v16::DataTransferRequest> call) {
this->handle_data_transfer_pnc_trigger_message(call);
};
this->data_transfer_pnc_callbacks[conversions::messagetype_to_string(MessageType::CertificateSigned)] =
[this](ocpp::Call<ocpp::v16::DataTransferRequest> call) {
this->handle_data_transfer_pnc_certificate_signed(call);
};
this->data_transfer_pnc_callbacks[conversions::messagetype_to_string(MessageType::GetInstalledCertificateIds)] =
[this](ocpp::Call<ocpp::v16::DataTransferRequest> call) {
this->handle_data_transfer_pnc_get_installed_certificates(call);
};
this->data_transfer_pnc_callbacks[conversions::messagetype_to_string(MessageType::DeleteCertificate)] =
[this](ocpp::Call<ocpp::v16::DataTransferRequest> call) {
this->handle_data_transfer_delete_certificate(call);
};
this->data_transfer_pnc_callbacks[conversions::messagetype_to_string(MessageType::InstallCertificate)] =
[this](ocpp::Call<ocpp::v16::DataTransferRequest> call) {
this->handle_data_transfer_install_certificate(call);
};
this->ocsp_request_timer = std::make_unique<Everest::SteadyTimer>(&this->io_service, [this]() {
this->update_ocsp_cache();
this->ocsp_request_timer->interval(OCSP_REQUEST_TIMER_INTERVAL);
});
}
}
std::unique_ptr<ocpp::MessageQueue<v16::MessageType>> ChargePointImpl::create_message_queue() {
return std::make_unique<ocpp::MessageQueue<v16::MessageType>>(
[this](json message) -> bool { return this->websocket->send(message.dump()); },
MessageQueueConfig{
this->configuration->getTransactionMessageAttempts(),
this->configuration->getTransactionMessageRetryInterval(),
this->configuration->getMessageQueueSizeThreshold().value_or(DEFAULT_MESSAGE_QUEUE_SIZE_THRESHOLD),
this->configuration->getQueueAllMessages().value_or(false)},
this->external_notify, this->database_handler);
}
void ChargePointImpl::init_websocket() {
auto connection_options = this->get_ws_connection_options();
this->websocket = std::make_unique<Websocket>(connection_options, this->evse_security, this->logging);
this->websocket->register_connected_callback([this](const int security_profile) {
if (this->connection_state_changed_callback != nullptr) {
this->connection_state_changed_callback(true);
}
this->message_queue->resume(this->message_queue_resume_delay);
this->connected_callback();
});
this->websocket->register_disconnected_callback([this]() {
if (this->connection_state_changed_callback != nullptr) {
this->connection_state_changed_callback(false);
}
this->message_queue->pause();
if (this->ocsp_request_timer != nullptr) {
this->ocsp_request_timer->stop();
}
if (this->client_certificate_timer != nullptr) {
this->client_certificate_timer->stop();
}
if (this->v2g_certificate_timer != nullptr) {
this->v2g_certificate_timer->stop();
}
});
this->websocket->register_closed_callback([this](const websocketpp::close::status::value reason) {
if (this->switch_security_profile_callback != nullptr) {
this->switch_security_profile_callback();
}
});
this->websocket->register_message_callback([this](const std::string& message) { this->message_callback(message); });
}
void ChargePointImpl::init_state_machine(const std::map<int, ChargePointStatus>& connector_status_map) {
// if connector_status_map empty it retrieves the last availablity states from the database
if (connector_status_map.empty()) {
auto connector_availability = this->database_handler->get_connector_availability();
std::map<int, ChargePointStatus> _connector_status_map;
for (const auto& [connector, availability] : connector_availability) {
if (availability == AvailabilityType::Operative) {
_connector_status_map[connector] = ChargePointStatus::Available;
if (this->enable_evse_callback != nullptr) {
this->enable_evse_callback(connector);
}
} else {
_connector_status_map[connector] = ChargePointStatus::Unavailable;
if (this->disable_evse_callback != nullptr) {
this->disable_evse_callback(connector);
}
}
}
this->status->reset(_connector_status_map);
} else {
if ((size_t)this->configuration->getNumberOfConnectors() + 1 != connector_status_map.size()) {
throw std::runtime_error(
"Number of configured connectors doesn't match number of connectors in the database.");
}
this->status->reset(connector_status_map);
}
}
WebsocketConnectionOptions ChargePointImpl::get_ws_connection_options() {
auto security_profile = this->configuration->getSecurityProfile();
auto uri = Uri::parse_and_validate(this->configuration->getCentralSystemURI(),
this->configuration->getChargePointId(), security_profile);
WebsocketConnectionOptions connection_options{OcppProtocolVersion::v16,
uri,
security_profile,
this->configuration->getAuthorizationKey(),
this->configuration->getRetryBackoffRandomRange(),
this->configuration->getRetryBackoffRepeatTimes(),
this->configuration->getRetryBackoffWaitMinimum(),
-1,
this->configuration->getSupportedCiphers12(),
this->configuration->getSupportedCiphers13(),
this->configuration->getWebsocketPingInterval().value_or(0),
this->configuration->getWebsocketPingPayload(),
this->configuration->getWebsocketPongTimeout(),
this->configuration->getUseSslDefaultVerifyPaths(),
this->configuration->getAdditionalRootCertificateCheck(),
this->configuration->getHostName(),
this->configuration->getVerifyCsmsCommonName()};
return connection_options;
}
void ChargePointImpl::connect_websocket() {
if (!this->websocket->is_connected()) {
this->init_websocket();
this->websocket->connect();
}
}
void ChargePointImpl::disconnect_websocket() {
if (this->websocket->is_connected()) {
this->websocket->disconnect(websocketpp::close::status::normal);
}
}
void ChargePointImpl::call_set_connection_timeout() {
if (this->set_connection_timeout_callback != nullptr) {
this->set_connection_timeout_callback(this->configuration->getConnectionTimeOut());
}
}
void ChargePointImpl::heartbeat(bool initiated_by_trigger_message) {
EVLOG_debug << "Sending heartbeat";
HeartbeatRequest req;
ocpp::Call<HeartbeatRequest> call(req, this->message_queue->createMessageId());
this->send<HeartbeatRequest>(call, initiated_by_trigger_message);
}
void ChargePointImpl::boot_notification(bool initiated_by_trigger_message) {
EVLOG_debug << "Sending BootNotification";
BootNotificationRequest req;
req.chargeBoxSerialNumber.emplace(this->configuration->getChargeBoxSerialNumber());
req.chargePointModel = this->configuration->getChargePointModel();
req.chargePointSerialNumber = this->configuration->getChargePointSerialNumber();
req.chargePointVendor = this->configuration->getChargePointVendor();
req.firmwareVersion.emplace(this->configuration->getFirmwareVersion());
req.iccid = this->configuration->getICCID();
req.imsi = this->configuration->getIMSI();
req.meterSerialNumber = this->configuration->getMeterSerialNumber();
req.meterType = this->configuration->getMeterType();
ocpp::Call<BootNotificationRequest> call(req, this->message_queue->createMessageId());
this->send<BootNotificationRequest>(call, initiated_by_trigger_message);
}
void ChargePointImpl::clock_aligned_meter_values_sample() {
if (this->initialized) {
EVLOG_debug << "Sending clock aligned meter values";
for (int32_t connector = 1; connector < this->configuration->getNumberOfConnectors() + 1; connector++) {
auto meter_value = this->get_latest_meter_value(
connector, this->configuration->getMeterValuesAlignedDataVector(), ReadingContext::Sample_Clock);
if (meter_value.has_value()) {
if (this->transaction_handler->transaction_active(connector)) {
this->transaction_handler->get_transaction(connector)->add_meter_value(meter_value.value());
}
this->send_meter_value(connector, meter_value.value());
} else {
EVLOG_warning << "Could not send clock aligned meter value for uninitialized measurement at connector#"
<< connector;
}
}
}
}
void ChargePointImpl::update_heartbeat_interval() {
this->heartbeat_timer->interval(std::chrono::seconds(this->configuration->getHeartbeatInterval()));
}
void ChargePointImpl::update_meter_values_sample_interval() {
// TODO(kai): should we update the meter values for continuous monitoring here too?
int32_t interval = this->configuration->getMeterValueSampleInterval();
this->transaction_handler->change_meter_values_sample_intervals(interval);
}
void ChargePointImpl::update_clock_aligned_meter_values_interval() {
const auto clock_aligned_data_interval = this->configuration->getClockAlignedDataInterval();
if (clock_aligned_data_interval > 0) {
this->clock_aligned_meter_values_timer->interval_starting_from(
std::chrono::seconds(clock_aligned_data_interval),
std::chrono::floor<date::days>(date::utc_clock::to_sys(date::utc_clock::now())));
} else {
this->clock_aligned_meter_values_timer->stop();
}
}
void ChargePointImpl::stop_pending_transactions() {
const auto transactions = this->database_handler->get_transactions(true);
for (const auto& transaction_entry : transactions) {
std::shared_ptr<Transaction> transaction = std::make_shared<Transaction>(
transaction_entry.connector, transaction_entry.session_id, CiString<20>(transaction_entry.id_tag_start),
transaction_entry.meter_start, transaction_entry.reservation_id,
ocpp::DateTime(transaction_entry.time_start), nullptr);
ocpp::DateTime timestamp;
int meter_stop = 0;
if (transaction_entry.time_end.has_value() and transaction_entry.meter_stop.has_value()) {
timestamp = ocpp::DateTime(transaction_entry.time_end.value());
meter_stop = transaction_entry.meter_stop.value();
} else {
timestamp = ocpp::DateTime(transaction_entry.meter_last_time);
meter_stop = transaction_entry.meter_last;
}
const auto stop_energy_wh = std::make_shared<StampedEnergyWh>(timestamp, meter_stop);
transaction->add_stop_energy_wh(stop_energy_wh);
transaction->set_transaction_id(transaction_entry.transaction_id);
// StopTransaction.req is not yet queued for the transaction in the database, so we add the transaction to the
// transaction_handler and initiate a StopTransaction.req
if (!this->message_queue->contains_stop_transaction_message(transaction_entry.transaction_id)) {
EVLOG_info << "Sending StopTransaction.req for transaction with id: " << transaction_entry.transaction_id
<< " because it hasn't been acknowledged by CSMS.";
this->transaction_handler->add_transaction(transaction);
this->stop_transaction(transaction_entry.connector, Reason::PowerLoss, std::nullopt);
this->database_handler->update_transaction(transaction_entry.session_id, meter_stop, timestamp.to_rfc3339(),
std::nullopt, Reason::PowerLoss);
}
}
}
void ChargePointImpl::load_charging_profiles() {
auto profiles = this->database_handler->get_charging_profiles();
EVLOG_info << "Found " << profiles.size() << " charging profile(s) in the database";
const auto supported_purpose_types = this->configuration->getSupportedChargingProfilePurposeTypes();
for (auto& profile : profiles) {
const auto connector_id = this->database_handler->get_connector_id(profile.chargingProfileId);
if (this->smart_charging_handler->validate_profile(
profile, connector_id, false, this->configuration->getChargeProfileMaxStackLevel(),
this->configuration->getMaxChargingProfilesInstalled(),
this->configuration->getChargingScheduleMaxPeriods(),
this->configuration->getChargingScheduleAllowedChargingRateUnitVector()) and
std::find(supported_purpose_types.begin(), supported_purpose_types.end(), profile.chargingProfilePurpose) !=
supported_purpose_types.end()) {
if (profile.chargingProfilePurpose == ChargingProfilePurposeType::ChargePointMaxProfile) {
this->smart_charging_handler->add_charge_point_max_profile(profile);
} else if (profile.chargingProfilePurpose == ChargingProfilePurposeType::TxDefaultProfile) {
this->smart_charging_handler->add_tx_default_profile(profile, connector_id);
} else if (profile.chargingProfilePurpose == ChargingProfilePurposeType::TxProfile) {
this->smart_charging_handler->add_tx_profile(profile, connector_id);
}
} else {
// delete if not valid anymore
this->database_handler->delete_charging_profile(profile.chargingProfileId);
}
}
}
std::optional<MeterValue> ChargePointImpl::get_latest_meter_value(int32_t connector,
std::vector<MeasurandWithPhase> values_of_interest,
ReadingContext context) {
std::lock_guard<std::mutex> lock(measurement_mutex);
std::optional<MeterValue> filtered_meter_value_opt;
// TODO(kai): also support readings from the charge point measurement at "connector 0"
if (this->connectors.find(connector) != this->connectors.end() &&
this->connectors.at(connector)->measurement.has_value()) {
MeterValue filtered_meter_value;
const auto measurement = this->connectors.at(connector)->measurement.value();
const auto power_meter = measurement.power_meter;
const auto timestamp = power_meter.timestamp;
filtered_meter_value.timestamp = ocpp::DateTime(timestamp);
EVLOG_debug << "Measurement value for connector: " << connector << ": " << measurement;
for (auto configured_measurand : values_of_interest) {
EVLOG_debug << "Value of interest: " << conversions::measurand_to_string(configured_measurand.measurand);
// constructing sampled value
SampledValue sample;
sample.context.emplace(context);
sample.format.emplace(ValueFormat::Raw); // TODO(kai): support signed data as well
sample.measurand.emplace(configured_measurand.measurand);
if (configured_measurand.phase) {
EVLOG_debug << " there is a phase configured: "
<< conversions::phase_to_string(configured_measurand.phase.value());
}
switch (configured_measurand.measurand) {
case Measurand::Energy_Active_Import_Register: {
const auto energy_Wh_import = power_meter.energy_Wh_import;
// Imported energy in Wh (from grid)
sample.unit.emplace(UnitOfMeasure::Wh);
sample.location.emplace(Location::Outlet);
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
if (energy_Wh_import.L1) {
sample.value = ocpp::conversions::double_to_string((double)energy_Wh_import.L1.value());
} else {
EVLOG_debug
<< "Power meter does not contain energy_Wh_import configured measurand for phase L1";
}
} else if (phase == Phase::L2) {
if (energy_Wh_import.L2) {
sample.value = ocpp::conversions::double_to_string((double)energy_Wh_import.L2.value());
} else {
EVLOG_debug
<< "Power meter does not contain energy_Wh_import configured measurand for phase L2";
}
} else if (phase == Phase::L3) {
if (energy_Wh_import.L3) {
sample.value = ocpp::conversions::double_to_string((double)energy_Wh_import.L3.value());
} else {
EVLOG_debug
<< "Power meter does not contain energy_Wh_import configured measurand for phase L3";
}
}
} else {
// store total value
sample.value = ocpp::conversions::double_to_string((double)energy_Wh_import.total);
}
break;
}
case Measurand::Energy_Active_Export_Register: {
const auto energy_Wh_export = power_meter.energy_Wh_export;
// Exported energy in Wh (to grid)
sample.unit.emplace(UnitOfMeasure::Wh);
// TODO: which location is appropriate here? Inlet?
// sample.location.emplace(Location::Outlet);
if (energy_Wh_export) {
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
if (energy_Wh_export.value().L1) {
sample.value =
ocpp::conversions::double_to_string((double)energy_Wh_export.value().L1.value());
} else {
EVLOG_debug << "Power meter does not contain energy_Wh_export configured measurand "
"for phase L1";
}
} else if (phase == Phase::L2) {
if (energy_Wh_export.value().L2) {
sample.value =
ocpp::conversions::double_to_string((double)energy_Wh_export.value().L2.value());
} else {
EVLOG_debug << "Power meter does not contain energy_Wh_export configured measurand "
"for phase L2";
}
} else if (phase == Phase::L3) {
if (energy_Wh_export.value().L3) {
sample.value =
ocpp::conversions::double_to_string((double)energy_Wh_export.value().L3.value());
} else {
EVLOG_debug << "Power meter does not contain energy_Wh_export configured measurand "
"for phase L3";
}
}
} else {
// store total value
sample.value = ocpp::conversions::double_to_string((double)energy_Wh_export.value().total);
}
} else {
EVLOG_debug << "Power meter does not contain energy_Wh_export configured measurand";
}
break;
}
case Measurand::Power_Active_Import: {
const auto power_W = power_meter.power_W;
// power flow to EV, Instantaneous power in Watt
sample.unit.emplace(UnitOfMeasure::W);
sample.location.emplace(Location::Outlet);
if (power_W) {
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
if (power_W.value().L1) {
sample.value = ocpp::conversions::double_to_string((double)power_W.value().L1.value());
} else {
EVLOG_debug << "Power meter does not contain power_W configured measurand for phase L1";
}
} else if (phase == Phase::L2) {
if (power_W.value().L2) {
sample.value = ocpp::conversions::double_to_string((double)power_W.value().L2.value());
} else {
EVLOG_debug << "Power meter does not contain power_W configured measurand for phase L2";
}
} else if (phase == Phase::L3) {
if (power_W.value().L3) {
sample.value = ocpp::conversions::double_to_string((double)power_W.value().L3.value());
} else {
EVLOG_debug << "Power meter does not contain power_W configured measurand for phase L3";
}
}
} else {
// store total value
sample.value = ocpp::conversions::double_to_string((double)power_W.value().total);
}
} else {
EVLOG_debug << "Power meter does not contain power_W configured measurand";
}
break;
}
case Measurand::Voltage: {
const auto voltage_V = power_meter.voltage_V;
// AC supply voltage, Voltage in Volts
sample.unit.emplace(UnitOfMeasure::V);
sample.location.emplace(Location::Outlet);
if (voltage_V) {
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
if (voltage_V.value().L1) {
sample.value =
ocpp::conversions::double_to_string((double)voltage_V.value().L1.value());
} else {
EVLOG_debug
<< "Power meter does not contain voltage_V configured measurand for phase L1";
}
} else if (phase == Phase::L2) {
if (voltage_V.value().L2) {
sample.value =
ocpp::conversions::double_to_string((double)voltage_V.value().L2.value());
} else {
EVLOG_debug
<< "Power meter does not contain voltage_V configured measurand for phase L2";
}
} else if (phase == Phase::L3) {
if (voltage_V.value().L3) {
sample.value =
ocpp::conversions::double_to_string((double)voltage_V.value().L3.value());
} else {
EVLOG_debug
<< "Power meter does not contain voltage_V configured measurand for phase L3";
}
}
}
// report DC value if set. This is a workaround for the fact that the power meter does not report
// AC (Dc charging)
else if (voltage_V.value().DC) {
sample.value = ocpp::conversions::double_to_string((double)voltage_V.value().DC.value());
}
} else {
EVLOG_debug << "Power meter does not contain voltage_V configured measurand";
}
break;
}
case Measurand::Current_Import: {
const auto current_A = power_meter.current_A;
// current flow to EV in A
sample.unit.emplace(UnitOfMeasure::A);
sample.location.emplace(Location::Outlet);
if (current_A) {
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
if (current_A.value().L1) {
sample.value =
ocpp::conversions::double_to_string((double)current_A.value().L1.value());
} else {
EVLOG_debug
<< "Power meter does not contain current_A configured measurand for phase L1";
}
} else if (phase == Phase::L2) {
if (current_A.value().L2) {
sample.value =
ocpp::conversions::double_to_string((double)current_A.value().L2.value());
} else {
EVLOG_debug
<< "Power meter does not contain current_A configured measurand for phase L2";
}
} else if (phase == Phase::L3) {
if (current_A.value().L3) {
sample.value =
ocpp::conversions::double_to_string((double)current_A.value().L3.value());
} else {
EVLOG_debug
<< "Power meter does not contain current_A configured measurand for phase L3";
}
}
}
// report DC value if set. This is a workaround for the fact that the power meter does not report
// AC (DC charging)
else if (current_A.value().DC) {
sample.value = ocpp::conversions::double_to_string((double)current_A.value().DC.value());
}
} else {
EVLOG_debug << "Power meter does not contain current_A configured measurand";
}
break;
}
case Measurand::Frequency: {
const auto frequency_Hz = power_meter.frequency_Hz;
// Grid frequency in Hertz
// TODO: which location is appropriate here? Inlet?
// sample.location.emplace(Location::Outlet);
if (frequency_Hz) {
if (configured_measurand.phase) {
// phase available and it makes sense here
auto phase = configured_measurand.phase.value();
sample.phase.emplace(phase);
if (phase == Phase::L1) {
sample.value = ocpp::conversions::double_to_string((double)frequency_Hz.value().L1);
} else if (phase == Phase::L2) {
if (frequency_Hz.value().L2) {
sample.value =
ocpp::conversions::double_to_string((double)frequency_Hz.value().L2.value());
} else {
EVLOG_debug
<< "Power meter does not contain frequency_Hz configured measurand for phase L2";
}
} else if (phase == Phase::L3) {
if (frequency_Hz.value().L3) {
sample.value =
ocpp::conversions::double_to_string((double)frequency_Hz.value().L3.value());
} else {
EVLOG_debug
<< "Power meter does not contain frequency_Hz configured measurand for phase L3";
}
}
}
} else {
EVLOG_debug << "Power meter does not contain frequency_Hz configured measurand";
}
break;
}
case Measurand::Current_Offered: {
// current offered to EV
sample.unit.emplace(UnitOfMeasure::A);
sample.location.emplace(Location::Outlet);
sample.value = ocpp::conversions::double_to_string(this->connectors.at(connector)->max_current_offered);
break;
}
case Measurand::SoC: {
// state of charge
const auto soc = measurement.soc_Percent;
if (soc) {
sample.unit.emplace(UnitOfMeasure::Percent);
sample.value = ocpp::conversions::double_to_string(soc.value().value);
if (soc.value().location.has_value()) {
sample.location.emplace(conversions::string_to_location(soc.value().location.value()));
} else {
sample.location.emplace(Location::EV);
}
} else {
EVLOG_debug << "Measurement does not contain soc_Percent configured measurand";
}
break;
}
case Measurand::Temperature: {
// temperature
const auto temperature = measurement.temperature_C;
if (temperature) {
sample.unit.emplace(UnitOfMeasure::Celsius);
if (temperature.value().location.has_value()) {
sample.location.emplace(conversions::string_to_location(temperature.value().location.value()));
} else {
sample.location.emplace(Location::EV);
}
sample.value = ocpp::conversions::double_to_string(temperature.value().value);
} else {
EVLOG_debug << "Measurement does not contain temperature_C configured measurand";
}
break;
}
case Measurand::RPM: {
// RPM
const auto rpm = measurement.rpm;
if (rpm) {
sample.unit.emplace(UnitOfMeasure::RevolutionsPerMinute);
if (rpm.value().location.has_value()) {
sample.location.emplace(conversions::string_to_location(rpm.value().location.value()));
} else {
sample.location.emplace(Location::EV);
}
sample.value = ocpp::conversions::double_to_string(rpm.value().value);
} else {
EVLOG_debug << "Measurement does not contain rpm configured measurand";
}
break;
}
default:
break;
}
// only add if value is set
if (!sample.value.empty()) {
filtered_meter_value.sampledValue.push_back(sample);
}
}
filtered_meter_value_opt.emplace(filtered_meter_value);
}
return filtered_meter_value_opt;
}
MeterValue ChargePointImpl::get_signed_meter_value(const std::string& signed_value, const ReadingContext& context,
const ocpp::DateTime& timestamp) {
MeterValue meter_value;
meter_value.timestamp = timestamp;
SampledValue sampled_value;
sampled_value.context = context;
sampled_value.value = signed_value;
sampled_value.format = ValueFormat::SignedData;
meter_value.sampledValue.push_back(sampled_value);
return meter_value;
}
void ChargePointImpl::send_meter_value(int32_t connector, MeterValue meter_value, bool initiated_by_trigger_message) {
if (meter_value.sampledValue.size() == 0) {
return;
}
MeterValuesRequest req;
const auto message_id = this->message_queue->createMessageId();
// connector = 0 designates the main measurement
// connector > 0 designates a connector of the charge point
req.connectorId = connector;
std::ostringstream oss;
oss << "Gathering measurands of connector: " << connector;
if (connector > 0) {
auto transaction = this->transaction_handler->get_transaction(connector);
if (transaction != nullptr && transaction->get_transaction_id() != -1) {
auto transaction_id = transaction->get_transaction_id();
req.transactionId.emplace(transaction_id);
} else if (transaction != nullptr and transaction->get_transaction_id() == -1) {
// this means a transaction is active but we have not received a transaction_id from CSMS yet
this->message_queue->add_meter_value_message_id(transaction->get_start_transaction_message_id(),
message_id.get());
}
}
EVLOG_debug << oss.str();
req.meterValue.push_back(meter_value);
ocpp::Call<MeterValuesRequest> call(req, message_id);
this->send<MeterValuesRequest>(call, initiated_by_trigger_message);
}
bool ChargePointImpl::start(const std::map<int, ChargePointStatus>& connector_status_map, BootReasonEnum bootreason) {
this->bootreason = bootreason;
this->init_state_machine(connector_status_map);
this->init_websocket();
this->websocket->connect();
this->boot_notification();
this->load_charging_profiles();
this->stopped = false;
return true;
}
bool ChargePointImpl::restart(const std::map<int, ChargePointStatus>& connector_status_map, BootReasonEnum bootreason) {
if (this->stopped) {
EVLOG_info << "Restarting OCPP Chargepoint";
this->database_handler->open_db_connection(this->configuration->getNumberOfConnectors());
// instantiating new message queue on restart
this->message_queue = this->create_message_queue();
this->initialized = true;
return this->start(connector_status_map, bootreason);
} else {
EVLOG_warning << "Attempting to restart Chargepoint while it has not been stopped before";
return false;
}
}
void ChargePointImpl::reset_state_machine(const std::map<int, ChargePointStatus>& connector_status_map) {
this->status->reset(connector_status_map);
}
void ChargePointImpl::change_all_connectors_to_unavailable_for_firmware_update() {
std::map<int32_t, AvailabilityStatus> connector_availability_status;
bool transaction_running = false;
int32_t number_of_connectors = this->configuration->getNumberOfConnectors();
for (int32_t connector = 1; connector <= number_of_connectors; connector++) {
if (this->transaction_handler->transaction_active(connector)) {
EVLOG_debug << "change_all_connectors_to_unavailable_for_firmware_update: detected running Transaction on "
"connector "
<< connector;
transaction_running = true;
std::lock_guard<std::mutex> change_availability_lock(change_availability_mutex);
this->change_availability_queue[connector] = {AvailabilityType::Inoperative, false};
} else {
connector_availability_status[connector] = AvailabilityStatus::Accepted;
}
}
for (const auto& [connector, availability_status] : connector_availability_status) {
if (connector == 0) {
this->status->submit_event(0, FSMEvent::ChangeAvailabilityToUnavailable, ocpp::DateTime());
} else if (this->disable_evse_callback != nullptr and availability_status == AvailabilityStatus::Accepted) {
this->disable_evse_callback(connector);
}
}
if (!transaction_running) {
if (this->all_connectors_unavailable_callback) {
this->all_connectors_unavailable_callback();
}
}
}
void ChargePointImpl::stop_all_transactions() {
this->stop_all_transactions(Reason::Other);
}
void ChargePointImpl::stop_all_transactions(Reason reason) {
int32_t number_of_connectors = this->configuration->getNumberOfConnectors();
for (int32_t connector = 1; connector <= number_of_connectors; connector++) {
if (this->transaction_handler->transaction_active(connector)) {
this->stop_transaction_callback(connector, reason);
}
}
}
bool ChargePointImpl::stop() {
if (!this->stopped) {
EVLOG_info << "Stopping OCPP Chargepoint";
this->initialized = false;
if (this->boot_notification_timer != nullptr) {
this->boot_notification_timer->stop();
}
if (this->heartbeat_timer != nullptr) {
this->heartbeat_timer->stop();
}
if (this->clock_aligned_meter_values_timer != nullptr) {
this->clock_aligned_meter_values_timer->stop();
}
if (this->ocsp_request_timer != nullptr) {
this->ocsp_request_timer->stop();
}
if (this->client_certificate_timer != nullptr) {
this->client_certificate_timer->stop();
}
if (this->v2g_certificate_timer != nullptr) {
this->v2g_certificate_timer->stop();
}
this->websocket_timer.stop();
this->stop_all_transactions();
this->database_handler->close_db_connection();
this->websocket->disconnect(websocketpp::close::status::normal);
this->message_queue->stop();
this->stopped = true;
EVLOG_info << "Terminating...";
return true;
} else {
EVLOG_warning << "Attempting to stop Chargepoint while it has been stopped before";
return false;
}
EVLOG_info << "Terminating...";
}
void ChargePointImpl::connected_callback() {
this->switch_security_profile_callback = nullptr;
switch (this->connection_state) {
case ChargePointConnectionState::Disconnected: {
this->connection_state = ChargePointConnectionState::Connected;
break;
}
case ChargePointConnectionState::Booted: {
// on_open in a Booted state can happen after a successful reconnect.
// according to spec, a charge point should not send a BootNotification after a reconnect
// still we send StatusNotification.req for all connectors after a reconnect
for (int32_t connector = 0; connector <= this->configuration->getNumberOfConnectors(); connector++) {
this->status_notification(connector, ChargePointErrorCode::NoError, this->status->get_state(connector),
ocpp::DateTime());
}
break;
}
case ChargePointConnectionState::Pending: {
// in Pending state this can happen when we reconnected while the BootNotification had not been yet accepted
break;
}
default:
if (this->connection_state == ChargePointConnectionState::Connected && this->boot_notification_callerror) {
EVLOG_error << "Connected but not in state 'Disconnected' or 'Booted' and previous BootNotification "
"failed. Trying again...";
this->boot_notification_callerror = false;
this->boot_notification();
break;
}
EVLOG_error << "Connected but not in state 'Disconnected' or 'Booted', something is wrong: "
<< this->connection_state;
break;
}
}
void ChargePointImpl::message_callback(const std::string& message) {
EVLOG_debug << "Received Message: " << message;
// EVLOG_debug << "json message: " << json_message;
auto enhanced_message = this->message_queue->receive(message);
auto json_message = enhanced_message.message;
this->logging->central_system(conversions::messagetype_to_string(enhanced_message.messageType), message);
try {
// reject unsupported messages
if (this->configuration->getSupportedMessageTypesReceiving().count(enhanced_message.messageType) == 0) {
EVLOG_warning << "Received an unsupported message: " << enhanced_message.messageType;
// FIXME(kai): however, only send a CALLERROR when it is a CALL message we just received
if (enhanced_message.messageTypeId == MessageTypeId::CALL) {
auto call_error = CallError(enhanced_message.uniqueId, "NotSupported", "", json({}, true));
this->send(call_error);
} else if (enhanced_message.messageTypeId == MessageTypeId::CALLERROR) {
auto call_messagetype =
this->message_queue->string_to_messagetype(enhanced_message.call_message.at(CALL_ACTION));
if (call_messagetype == MessageType::BootNotification) {
EVLOG_error << "Received a CALLERROR in response to a BootNotification";
this->boot_notification_callerror = true;
}
}
// in any case stop message handling here:
return;
}
switch (this->connection_state) {
case ChargePointConnectionState::Disconnected: {
EVLOG_error << "Received a message in disconnected state, this cannot be correct";
break;
}
case ChargePointConnectionState::Connected: {
if (enhanced_message.messageType == MessageType::BootNotificationResponse) {
this->handleBootNotificationResponse(json_message);
}
break;
}
case ChargePointConnectionState::Rejected: {
if (this->registration_status == RegistrationStatus::Rejected) {
if (enhanced_message.messageType == MessageType::BootNotificationResponse) {
this->handleBootNotificationResponse(json_message);
}
}
break;
}
case ChargePointConnectionState::Pending: {
if (this->registration_status == RegistrationStatus::Pending) {
if (enhanced_message.messageType == MessageType::BootNotificationResponse) {
this->handleBootNotificationResponse(json_message);
} else {
this->handle_message(enhanced_message);
}
}