groundlevel stuff

src/udi/handlers/ttn/models/draginoLdds75/draginoLdds75.go

@@ -2,6 +2,7 @@ package draginoLdds75
 
 import (
   "fmt"
+  "log"
   "strings"
   "strconv"
   "encoding/json"
@@ -25,7 +26,7 @@ type message struct {
   TempC_DS18B20 string `json:"TempC_DS18B20"`
 }
 
-func Parse(fPort int, decodedPayload []byte, variables *map[string]database.VariableType) error {
+func Parse(fPort int, decodedPayload []byte, variables *map[string]database.VariableType, device *database.Device) error {
   if fPort != 2 {
     return fmt.Errorf("Unexpected fPort %d", fPort)
   }
@@ -54,6 +55,24 @@ func Parse(fPort int, decodedPayload []byte, variables *map[string]database.Vari
     Unit: "mm",
     Value: distance,
   }
+  groundLevelI, exists := device.Attributes["GroundLevel"]
+  groundLevelS, ok := groundLevelI.(string)
+  groundLevel, err3 := strconv.Atoi(groundLevelS)
+  if exists && err3 == nil && ok {
+    log.Println("add corrected distance")
+    correctedDistance := groundLevel - distance
+    (*variables)["CorrectedDistance"] = database.VariableType {
+      Label: "CorrectedDistance",
+      Variable: "Level",
+      Unit: "mm",
+      Value: correctedDistance,
+    }
+  } else {
+    log.Printf("no ground level: %s %s %s", exists, err3, ok)
+    log.Printf("Device: %s", device)
+    log.Printf("Attributes: %s", device.Attributes)
+  }
+
   return nil
 }