fix

.gitignore

@@ -1,4 +1,5 @@
 src/udi/udi
+src/udi/main
 src/udi/migrate_schema
 tmp/
 ENVDB

src/udi/config-test.json

@@ -20,15 +20,11 @@
     },
     {
       "topics": [ "zigbee2mqtt/+" ],
-      "handler": "SVEJ",
+      "handler": "Z2M",
-      "id": "SVEJ1",
+      "id": "Z2M",
       "config": {
         "databaseConnStr": "",
         "attributes": {
-          "application": "Temperature Multisensor",
-          "deviceSelector": "L:1",
-          "valueSelector": "J:$.temperature",
-          "unitSelector": "C:°C"
         }
       }
     }

src/udi/dispatcher/dispatcher.go

@@ -18,6 +18,7 @@ import "udi/handlers/svej"
 import "udi/handlers/dt1t"
 import "udi/handlers/locative"
 import "udi/handlers/snmp"
+import "udi/handlers/z2m"
 
 
 var handlerMap map[string]handler.Handler = make(map[string]handler.Handler)
@@ -50,6 +51,8 @@ func InitDispatcher() {
       factory = locative.New
     case "SNMP":
       factory = snmp.New
+    case "Z2M":
+      factory = z2m.New
     default:
       factory = nil
       log.Printf("No handler %s found, ignore mapping", mapping.Handler)

src/udi/handlers/svej/svej.go

@@ -99,24 +99,6 @@ func (self *SingleValueExtractorJsonpathHandler) ExtractionHelper(subTopics []st
       return "", fmt.Errorf("not enough subtopics")
     }
     res = subTopics[i]
-  case "L:":
-    // L: extract from topic and later match against devices table in database
-    i, e := strconv.Atoi(selector[2:])
-    if e != nil {
-      return "", fmt.Errorf("Atoi failed with %s", e)
-    }
-    if i >= len(subTopics) {
-      return "", fmt.Errorf("not enough subtopics")
-    }
-    ext := subTopics[i]
-    lookup, err1b := self.dbh.GetDeviceByLabel(ext)
-    if err1b != nil {
-      log.Printf("ext lookup %s failed: %v", ext, err1b)
-      res = ext
-    } else {
-      log.Printf("ext: %s", lookup)
-      res = ext
-    }
   case "C:":
     // use constant value
     res = selector[2:]

src/udi/handlers/z2m/models/wsdcgq11lm/wsdcgq11lm.go

@@ -0,0 +1,11 @@
+package wsdcgq11lm
+
+type Observation struct {
+  LinkQuality uint8 `unit:"" json:"linkquality"`
+  Battery uint8 `unit:"%" json:"battery"`
+  Humidity float32 `unit:"%H" json:"humidity"`
+  Pressure float32 `unit:"mbar" json:"pressure"`
+  Temperature float32 `unit:"°C" json:"temperature"`
+  Voltage uint16 `unit:"mV" json:"voltage"`
+}
+

src/udi/handlers/z2m/z2m.go

@@ -0,0 +1,104 @@
+package z2m
+
+import (
+  "fmt"
+  "log"
+  "time"
+  "strings"
+  "reflect"
+  "encoding/json"
+  "udi/config"
+  "udi/handlers/handler"
+  "udi/database"
+  "udi/handlers/z2m/models/wsdcgq11lm"
+)
+
+
+type Z2MHandler struct {
+  handler.CommonHandler
+  dbh *database.DatabaseHandle
+}
+
+func parse(T any, payload string, variables *map[string]database.VariableType, attributes *map[string]interface{}) error {
+  observationType := reflect.TypeOf(T)
+  observation := reflect.New(observationType).Interface()
+
+  err := json.Unmarshal([]byte(payload), observation)
+  if err != nil {
+    return fmt.Errorf("Unable to parse payload into Observation struct: %v, %s", err, payload)
+  }
+
+  observationValue := reflect.ValueOf(observation).Elem()
+
+  for i := 0; i < observationType.NumField(); i++ {
+    field := observationType.Field(i)
+    name := field.Name
+    unit := field.Tag.Get("unit")
+    value := observationValue.Field(i).Interface()
+
+    (*variables)[name] = database.VariableType {
+      Label: name,
+      Variable: "y",
+      Unit: unit,
+      Value: value,
+    }
+  }
+
+  (*attributes)["Status"] = "ok"
+
+  return nil
+}
+
+func New(id string, config config.HandlerConfigT) handler.Handler {
+  t := &Z2MHandler {
+  }
+  t.Id = id
+  t.dbh = database.NewDatabaseHandle()
+  return t
+}
+
+func (self *Z2MHandler) Handle(message handler.MessageT) {
+  log.Printf("Handler Z2M %d processing %s -> %s", self.Id, message.Topic, message.Payload)
+
+  var measurement database.Measurement
+  measurement.Time = time.Now()
+
+
+  subTopics := strings.Split(message.Topic, "/")
+  deviceId := subTopics[1]
+  log.Printf("DeviceId: %s", deviceId)
+  device, err1 := self.dbh.GetDeviceByLabel(deviceId)
+  if err1 != nil {
+    self.Lost("Error when loading device", err1, message)
+    return
+  }
+  log.Printf("Device: %s", device)
+
+  measurement.Application = device.Application.Label
+  measurement.Device = device.Attributes["Label"].(string)
+
+  var T any
+  switch device.DeviceType.ModelIdentifier {
+  case "WSDCGQ11LM":
+    T = wsdcgq11lm.Observation{}
+  default:
+    self.Lost(fmt.Sprintf("No parser found for %s", device.DeviceType.ModelIdentifier), nil, message)
+    return
+  }
+
+  measurement.Values = make(map[string]database.VariableType)
+  measurement.Attributes = make(map[string]interface{})
+  err3 := parse(T, 
+                message.Payload,
+                &(measurement.Values), 
+                &(measurement.Attributes))
+  if err3 != nil {
+    self.Lost("Model parser failed", err3, message)
+    return
+  }
+  log.Printf("Prepared measurement item: %s", measurement)
+  self.dbh.StoreMeasurement(&measurement)
+  self.S()
+}
+
+