Sync Easee Smart with Now/PV Modes (evcc-io#1007)

internal/charger/easee.go

@@ -18,12 +18,15 @@ import (
 // Easee charger implementation
 type Easee struct {
 	*request.Helper
-	charger       string
-	site, circuit int
-	status        easee.ChargerStatus
-	updated       time.Time
-	cache         time.Duration
-	lp            core.LoadPointAPI
+	charger           string
+	site, circuit     int
+	status            easee.ChargerStatus
+	updated           time.Time
+	cache             time.Duration
+	lp                core.LoadPointAPI
+	lastSmartCharging bool
+	lastChargeMode    api.ChargeMode
+	log               *util.Logger
 }
 
 func init() {
@@ -60,6 +63,7 @@ func NewEasee(user, password, charger string, cache time.Duration) (*Easee, erro
 		Helper:  request.NewHelper(log),
 		charger: charger,
 		cache:   cache,
+		log:     log,
 	}
 
 	ts, err := easee.TokenSource(log, user, password)
@@ -125,6 +129,47 @@ func (c *Easee) chargerDetails() (res easee.Site, err error) {
 	return res, err
 }
 
+func (c *Easee) syncSmartCharging() error {
+	if c.lp == nil {
+		return nil
+	}
+
+	if c.lp.GetMode() != c.lastChargeMode {
+		c.log.DEBUG.Printf("charge mode changed by loadpoint: %v -> %v", c.lastChargeMode, c.lp.GetMode())
+		newSmartCharging := false
+		if c.lp.GetMode() == api.ModePV {
+			newSmartCharging = true
+		}
+
+		data := easee.ChargerSettings{
+			SmartCharging: &newSmartCharging,
+		}
+
+		var req *http.Request
+		uri := fmt.Sprintf("%s/chargers/%s/settings", easee.API, c.charger)
+		req, err := request.New(http.MethodPost, uri, request.MarshalJSON(data), request.JSONEncoding)
+		if err == nil {
+			_, err = c.Do(req)
+			c.updated = time.Time{} // clear cache
+			c.lastChargeMode = c.lp.GetMode()
+			c.lastSmartCharging = newSmartCharging
+		}
+		return err
+	}
+
+	if c.lastSmartCharging != c.status.SmartCharging {
+		c.log.DEBUG.Printf("smart status changed by charger: %v -> %v", c.lastSmartCharging, c.status.SmartCharging)
+		if c.status.SmartCharging {
+			c.lp.SetMode(api.ModePV)
+		} else {
+			c.lp.SetMode(api.ModeNow)
+		}
+		c.lastSmartCharging = c.status.SmartCharging
+		c.lastChargeMode = c.lp.GetMode()
+	}
+	return nil
+}
+
 func (c *Easee) state() (easee.ChargerStatus, error) {
 	if time.Since(c.updated) < c.cache {
 		return c.status, nil
@@ -134,6 +179,7 @@ func (c *Easee) state() (easee.ChargerStatus, error) {
 	req, err := request.New(http.MethodGet, uri, nil, request.JSONEncoding)
 	if err == nil {
 		if err = c.DoJSON(req, &c.status); err == nil {
+			err = c.syncSmartCharging()
 			c.updated = time.Now()
 		}
 	}