Detect number of inverter strings (#999)

detect/definitions.go

@@ -35,6 +35,7 @@ const (
 	taskEVSEWifi     = "evsewifi"
 	taskGoE          = "go-e"
 	taskInverter     = "inverter"
+	taskStrings      = "strings"
 	taskBattery      = "battery"
 	taskMeter        = "meter"
 	taskFronius      = "fronius"
@@ -90,6 +91,18 @@ func init() {
 		},
 	})
 
+	taskList.Add(tasks.Task{
+		ID:      taskStrings,
+		Type:    tasks.Modbus,
+		Depends: TaskSunspec,
+		Config: map[string]interface{}{
+			"ids":     sunspecIDs,
+			"models":  []int{160},
+			"point":   "N",
+			"invalid": []int{0xFFFF},
+		},
+	})
+
 	taskList.Add(tasks.Task{
 		ID:      taskBattery,
 		Type:    tasks.Modbus,

detect/tasks/modbus.go

@@ -150,6 +150,8 @@ func (h *ModbusHandler) testSunSpec(log *util.Logger, conn meters.Connection, de
 				val = int(res.Uint16())
 			case "enum16":
 				val = int(res.Enum16())
+			case "count":
+				val = int(res.Count())
 			default:
 				panic("invalid point type: " + typ)
 			}