Versicharge: add mA regulation (#28173)

charger/versicharge.go

@@ -127,13 +127,22 @@ func (wb *Versicharge) Enable(enable bool) error {
 
 // MaxCurrent implements the api.Charger interface
 func (wb *Versicharge) MaxCurrent(current int64) error {
+	return wb.MaxCurrentMillis(float64(current))
+}
+
+var _ api.ChargerEx = (*Versicharge)(nil)
+
+// MaxCurrentMillis implements the api.ChargerEx interface
+func (wb *Versicharge) MaxCurrentMillis(current float64) error {
 	if current < 6 {
-		return fmt.Errorf("invalid current %d", current)
+		return fmt.Errorf("invalid current %.1f", current)
 	}
 
-	_, err := wb.conn.WriteSingleRegister(versiRegMaxCurrent, uint16(current))
+	curr := uint16(current * 100)
+
+	_, err := wb.conn.WriteSingleRegister(versiRegMaxCurrent, curr)
 	if err == nil {
-		wb.current = uint16(current)
+		wb.current = curr
 	}
 
 	return err

templates/definition/charger/versicharge.yaml

@@ -3,6 +3,7 @@ products:
   - brand: Siemens
     description:
       generic: Versicharge GEN3
+capabilities: ["mA"]
 requirements:
   evcc: ["sponsorship"]
   description: