Add HeliumUplinkMessage class

ttnhabbridge/src/main/java/nl/sikken/bertrik/hab/lorawan/HeliumUplinkMessage.java

@@ -0,0 +1,59 @@
+package nl.sikken.bertrik.hab.lorawan;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public final class HeliumUplinkMessage {
+
+    @JsonProperty("app_eui")
+    String appEui = "";
+
+    @JsonProperty("dev_eui")
+    String devEui = "";
+
+    // device address with bytes in reverse order
+    @JsonProperty("devaddr")
+    String devAddr = "";
+
+    @JsonProperty("fcnt")
+    int fcnt;
+
+    @JsonProperty("port")
+    int port;
+
+    @JsonProperty("name")
+    String name = "";
+
+    @JsonProperty("payload")
+    byte[] payload = new byte[0];
+
+    // milliseconds
+    @JsonProperty("reported_at")
+    long reportedAt;
+
+    @JsonProperty("hotspots")
+    List<HotSpot> hotSpots = new ArrayList<>();
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    static final class HotSpot {
+        @JsonProperty("name")
+        String name = "";
+
+        @JsonProperty("lat")
+        double latitude;
+
+        @JsonProperty("long")
+        double longitude;
+
+        @JsonProperty("rssi")
+        double rssi;
+
+        @JsonProperty("snr")
+        double snr;
+    }
+
+}