add status in ttn handlers

src/udi/handlers/ttn/models/draginoLmds200/draginoLmds200.go

@@ -26,7 +26,7 @@ type message struct {
   Dis2 int `json:"dis2"`
 }
 
-func Parse(fPort int, decodedPayload []byte, _ string, variables *map[string]database.VariableType, device *database.Device) error {
+func Parse(fPort int, decodedPayload []byte, _ string, variables *map[string]database.VariableType, attributes *map[string]interface{}, device *database.Device) error {
   if fPort != 2 {
     return fmt.Errorf("Unexpected fPort %d", fPort)
   }
@@ -55,6 +55,15 @@ func Parse(fPort int, decodedPayload []byte, _ string, variables *map[string]dat
     Unit: "mm",
     Value: distance2,
   }
+
+  if distance1 == 2 {
+    (*attributes)["Status"] = "invalid value"
+  } else if distance1 == 1 {
+    (*attributes)["Status"] = "no sensor detected"
+  } else {
+    (*attributes)["Status"] = "Ok"
+  }
+
   groundLevelI, exists := device.Attributes["GroundLevel"]
   groundLevelS, ok := groundLevelI.(string)
   groundLevel, err3 := strconv.Atoi(groundLevelS)