d398a6ced2
- CitrineOS core extracted (CSMS OCPP 2.0.1) - OpenOCPP extracted (firmware OCPP 1.6J/2.0.1) - ShapeShifter library installed (pip install -e) - ShapeShifter specification extracted - EVerest extracted TODO updated with progress
56 lines
3.5 KiB
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56 lines
3.5 KiB
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.. _everest_modules_handwritten_IsabellenhuetteIemDcr:
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.. *********************
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.. IsabellenhuetteIemDcr
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.. *********************
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Module implements Isabellenhuette IEM-DCR power meter driver, connecting via HTTP/REST.
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Implementation details
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======================
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This section offers some additional information on driver implementation. The underlying HTTP communication functionality
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is mainly duplicated from other open source powermeter modules of EVerest to support a standarization of this interface
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later on.
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Initialization
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--------------
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It begins with checking some plausibility measures on the handed configuration. Its default values are given in manifest.yaml.
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Please make sure to explicitly specify values that deviate from default configuration before starting the driver. If there is no
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conspicuousness in configuration, HTTP communication is verified with GET requests on /gw node. In case of no success, several
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retries are performed (as specified in config). On success POST /gw is issued for transfering CI, CT and datetime to IEM-DCR.
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Please note, that issuing POST /gw is only possible once after IEM-DCR power-up. So CI and CT are frozen until next power-cycle
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and datetime will be automatically updated using another node (POST /datetime) in configurable intervals. Therefore a warning
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will appear on EVerest console if CI and CT are already written and could not be updated. After this procedure the initial tariff
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text is transferred as configured. This will show up on display before a charging transaction.
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Live values
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-----------
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Each second the MQTT variable Powermeter is updated to current values of /metervalue node. Also the public key is made available
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via MQTT.
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Start transaction
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-----------------
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Starting a transaction will terminate any other running transaction (if there is one). The status type TransactionRequestStatus::
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NOT_SUPPORTED is returned, if given evse_id does not match CI (which was already transfered in initialization phase) and if IEM-DCR
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is in error state. Please refer to retrurned TransactionStartResponse.error for distinguishing between them. Starting a charging
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transaction will engage POST /user and POST /receipt. Please note that IEM-DCR automatically handles signed data tuple pagination. So
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the only place for transaction id defined by the charging station is the OCMF ID attribute. It will be filled from this driver with
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TransactionReq.identification_data. If this optional attribute is not given or empty, TransactionReq.transaction_id will be used
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instead. Please note that a transaction cannot be started while the sensor unit detects a current above activation treshold.
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Please refer to operation manual for details.
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Stop transaction
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----------------
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If a transaction is in progress, it will be stopped and its signed data tuple returned. If no transaction is running, the last signed
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data tuple will be returned. Therefore input parameter transaction_id of this routine has no impact on its operation. Please note that
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TransactionRequestStatus::UNEXPECTED_ERROR may be returned, if no transaction is in progress and there has also been no transaction
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before. Please also note that a transaction cannot be stopped while the sensor unit detects a current above activation treshold.
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Please refer to operation manual for details.
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References
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==========
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`IEM-DCR-125 <https://www.isabellenhuette.com/de/loesungen/produkte/iem-dcr-125>`_
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`IEM-DCR-1000 <https://www.isabellenhuette.com/de/loesungen/produkte/iem-dcr-1000>`_
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`IEM-DCR-1500 <https://www.isabellenhuette.com/de/loesungen/produkte/iem-dcr-1500>`_
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