Merge pull request #154 from andig/feature/currents

Allow reading currents

api/api.go

@@ -37,6 +37,11 @@ type MeterEnergy interface {
 	TotalEnergy() (float64, error)
 }
 
+// MeterCurrent is able to provide per-line current A
+type MeterCurrent interface {
+	Currents() (float64, float64, float64, error)
+}
+
 // Charger is able to provide current charging status and to enable/disabler charging
 type Charger interface {
 	Status() (ChargeStatus, error)

charger/go-e.go

@@ -139,3 +139,13 @@ func (c *GoE) ChargedEnergy() (float64, error) {
 	energy := float64(status.Dws) / 3.6e6
 	return energy, err
 }
+
+// Currents implements the MeterCurrent interface
+func (c *GoE) Currents() (float64, float64, float64, error) {
+	var status goeStatusResponse
+	_, err := c.GetJSON(c.apiURL(goeStatus), &status)
+	if len(status.Nrg) == 16 {
+		return float64(status.Nrg[4]) / 10, float64(status.Nrg[5]) / 10, float64(status.Nrg[6]) / 10, nil
+	}
+	return 0, 0, 0, err
+}

cmd/dump.go

@@ -25,6 +25,14 @@ func dumpAPIs(v interface{}) {
 		}
 	}
 
+	if v, ok := v.(api.MeterCurrent); ok {
+		if i1, i2, i3, err := v.Currents(); err != nil {
+			fmt.Printf("Current L1..L3: %v\n", err)
+		} else {
+			fmt.Printf("Current L1..L3: %.1fA %.1fA %.1fA\n", i1, i2, i3)
+		}
+	}
+
 	if v, ok := v.(api.ChargeRater); ok {
 		if energy, err := v.ChargedEnergy(); err != nil {
 			fmt.Printf("Charged: %v\n", err)