Make remote id tag configurable and reset on Home Assistant transaction start

config/configuration.yaml

@@ -47,6 +47,7 @@ frontend:
 #scene: !include scenes.yaml
 
 ocpp:
+  remote_id_tag: "TESTRFIDTAG123456789"
   default_authorization_status: 'Invalid'
   authorization_list:
     - id_tag: 'pulsar'

custom_components/ocpp/chargepoint.py

@@ -51,6 +51,7 @@
     CONF_AUTH_STATUS,
     CONF_DEFAULT_AUTH_STATUS,
     CONF_ID_TAG,
+    CONF_REMOTE_ID_TAG,
     CONF_MONITORED_VARIABLES,
     CONF_NUM_CONNECTORS,
     CONF_CPIDS,
@@ -279,8 +280,7 @@ def __init__(
         self._metrics[(0, cstat.reconnects.value)].value = 0
 
         self._attr_supported_features = prof.NONE
-        alphabet = string.ascii_uppercase + string.digits
-        self._remote_id_tag = "".join(secrets.choice(alphabet) for i in range(20))
+        self._remote_id_tag = self.get_remote_id_tag()
         self.num_connectors: int = DEFAULT_NUM_CONNECTORS
 
     def _init_connector_slots(self, conn_id: int) -> None:
@@ -293,6 +293,26 @@ def _init_connector_slots(self, conn_id: int) -> None:
         self._metrics[(conn_id, csess.session_energy.value)].unit = HA_ENERGY_UNIT
         self._metrics[(conn_id, csess.meter_start.value)].unit = HA_ENERGY_UNIT
 
+    def get_remote_id_tag(self) -> str:
+        """Get remote id tag from configuration.yaml or generate a random 20 char one."""
+        config = self.hass.data[DOMAIN].get(CONFIG, {})
+        alphabet = string.ascii_uppercase + string.digits
+        fallback = "".join(secrets.choice(alphabet) for _ in range(20))
+        remote_id_tag = config.get(CONF_REMOTE_ID_TAG)
+
+        if isinstance(remote_id_tag, str):
+            remote_id_tag = remote_id_tag.strip()
+            if 0 < len(remote_id_tag) <= 20:
+                return remote_id_tag
+
+        if remote_id_tag is not None:
+            _LOGGER.warning(
+                "Invalid %s configured for charge point %s; using generated fallback tag",
+                CONF_REMOTE_ID_TAG,
+                self.id,
+            )
+
+        return fallback
     async def get_number_of_connectors(self) -> int:
         """Return number of connectors on this charger."""
         return self.num_connectors

custom_components/ocpp/const.py

@@ -28,6 +28,7 @@
 CONF_NUM_CONNECTORS = "num_connectors"
 CONF_PASSWORD = ha.CONF_PASSWORD
 CONF_PORT = ha.CONF_PORT
+CONF_REMOTE_ID_TAG = "remote_id_tag"
 CONF_SKIP_SCHEMA_VALIDATION = "skip_schema_validation"
 CONF_FORCE_SMART_CHARGING = "force_smart_charging"
 CONF_SSL = "ssl"

custom_components/ocpp/ocppv16.py

@@ -656,6 +656,8 @@ async def start_transaction(self, connector_id: int = 1):
         )
         resp = await self.call(req)
         if resp.status == RemoteStartStopStatus.accepted:
+            # Reset id tag if set by on authorize (RFID)
+            self._metrics[0][cstat.id_tag.value].value = self._remote_id_tag
             return True
         else:
             _LOGGER.warning("Failed with response: %s", resp.status)