calculate virtual location based on TTN GW

README.md

@@ -10,7 +10,7 @@ TODO
 ### Database
 **Change name of database and credentials as you like!**
 
-- Create new database: `CREATE DATABASE locationhub;`
+- Create new database: `CREATE DATABASE dev_locationhub;`
 - Create new user for database: `GRANT ALL PRIVILEGES ON dev_locationhub.* TO 'dbuser'@'localhost' IDENTIFIED BY '1234';`
 - Import tables: `/usr/bin/mariadb -u dbuser -p1234 dev_locationhub < server/sql/tables.sql`
 

server/src/eventHandler/ttnMessageReceivedEventHandler.ts

@@ -8,6 +8,34 @@ domainEventEmitter.on(
   TtnMessageReceivedEventName,
   async (event: TtnMessageReceivedEvent) => {
     console.log(event);
-    // TODO Hendrik 🚀
+
+    if (!event.ttnGateways || event.ttnGateways.length === 0) {
+      console.log("No TTN Gateway location received!")
+    } else {
+      let totalWeight = 0;
+      let weightedLatitude = 0;
+      let weightedLongitude = 0;
+
+      event.ttnGateways.forEach(gw => {
+        const weight = 1 / Math.abs(gw.rssi); // Higher RSSI (closer to 0) gives more weight
+        totalWeight += weight;
+        weightedLatitude += gw.latitude * weight;
+        weightedLongitude += gw.longitude * weight;
+      });
+
+      // Calculate the weighted average to get the virtual location
+      const virtualLocation = {
+        latitude: weightedLatitude / totalWeight,
+        longitude: weightedLongitude / totalWeight
+      };
+
+      console.log("Tracker location based on TTN Gateway location:", virtualLocation);
+    }
+
+
+
+
+
   }
 );
+

server/src/index.ts

@@ -25,5 +25,5 @@ app.use("/api/locations", locationRoutes);
 app.use("/api/ttn", ttnRoutes);
 
 app.listen(PORT, () => {
-  console.log(`🚀 Server läuft auf http://localhost:${PORT}`);
+  console.log(`🚀 Server runs here: http://localhost:${PORT}`);
 });