OpenWB 2.0: fix enabled state handling (evcc-io#11543)

charger/openwb-2.0.go

@@ -11,9 +11,10 @@ import (
 
 // OpenWB20 charger implementation
 type OpenWB20 struct {
- conn *modbus.Connection
- curr uint16
- base uint16
+ conn *modbus.Connection
+ enabled bool
+ curr uint16
+ base uint16
 }
 
 const (
@@ -106,12 +107,7 @@ func (wb *OpenWB20) Status() (api.ChargeStatus, error) {
 
 // Enabled implements the api.Charger interface
 func (wb *OpenWB20) Enabled() (bool, error) {
- b, err := wb.conn.ReadInputRegisters(wb.base+openwbRegActualAmps, 1)
- if err != nil {
- return false, err
- }
-
- return binary.BigEndian.Uint16(b) == 1, nil
+ return verifyEnabled(wb, wb.enabled)
 }
 
 func (wb *OpenWB20) setCurrent(u uint16) error {
@@ -125,8 +121,11 @@ func (wb *OpenWB20) Enable(enable bool) error {
  if enable {
  u = wb.curr
  }
-
- return wb.setCurrent(u)
+ err := wb.setCurrent(u)
+ if err == nil {
+ wb.enabled = enable
+ }
+ return err
 }
 
 // MaxCurrent implements the api.Charger interface