Kathrein: add RFID support (#23349)

charger/kathrein.go

@@ -115,6 +115,7 @@ const (
 	kathreinRegGrantedPower     = 0x0066 // uint16 Granted charging power [1380 … 22080] @230VAC (W)
 	kathreinRegChargingDuration = 0x0067 // uint32 Duration Charging (s)
 	kathreinRegChargingEnergy   = 0x0069 // uint32 Energy Charging Energy (per charging session) (Wh)
+	kathreinRegRfid             = 0x0070 // String RFID tag Info
 
 	// EMS-Control - Control register (uint16)
 	//   0x8000 : Enable EMS-Control
@@ -398,6 +399,22 @@ func (wb *Kathrein) GetPhases() (int, error) {
 	}
 }
 
+var _ api.Identifier = (*Kathrein)(nil)
+
+// Identify implements the api.Identifier interface
+func (wb *Kathrein) Identify() (string, error) {
+	b, err := wb.conn.ReadHoldingRegisters(kathreinRegRfid, 16)
+	if err != nil {
+		return "", err
+	}
+
+	if string(b) == "VOID" {
+		return "", nil
+	}
+
+	return string(b), nil
+}
+
 var _ api.Diagnosis = (*Kathrein)(nil)
 
 // Diagnose implements the api.Diagnosis interface

templates/definition/charger/kathrein.yaml

@@ -18,11 +18,11 @@ products:
   - brand: Kathrein
     description:
       generic: KWB-AC60 E
-capabilities: ["1p3p", "mA"]
+capabilities: ["1p3p", "mA", "rfid"]
 requirements:
   description:
-    de: Der Modbus-Server (TCP-Port 502) muss über die Weboberfläche der Wallbox aktiviert werden. Getestet mit Firmware-Version v2.3.2
-    en: The Modbus server (TCP port 502) must be activated on the Wallbox using the Web interface. Tested with Firmware version v2.3.2
+    de: Der Modbus-Server (TCP-Port 502) muss über die Weboberfläche der Wallbox aktiviert werden. Getestet mit Firmware-Version v2.7.0
+    en: The Modbus server (TCP port 502) must be activated on the Wallbox using the Web interface. Tested with Firmware version v2.7.0
   evcc: ["sponsorship"]
 params:
   - name: modbus