Format JSON payload

esp32-thread/open-thread-client/main/esp_ot_cli.c

@@ -276,10 +276,9 @@ char* gps_to_json(char* gps_data) {
             longitude = nmea_to_decimal(fields[4], fields[5][0]);
         }
     }
-
-    snprintf(json, sizeof(json), "{\"data\":{\"latitude\":%.6f,\"longitude\":%.6f}}",
-             latitude, longitude);
-
+    
+    time_t current_time = time(NULL);
+    snprintf(json, sizeof(json), "{\"latitude\":%.6f,\"longitude\":%.6f}", latitude, longitude);
     return json;
 }
 

rpi/controllers/mqtt_forwarder.py

@@ -1,3 +1,7 @@
+import datetime
+import json
+import time
+
 from services.mqtt_service import MQTTService
 
 class MQTTForwarder:
@@ -14,8 +18,19 @@ class MQTTForwarder:
     def start(self, src_topic: str, dst_topic: str):
         try:
             def forward_handler(topic: str, msg: str):
-                self.central_broker.publish(dst_topic, msg)
+                forwarded_msg = self.__wrapData(msg)
+                self.central_broker.publish(dst_topic, forwarded_msg)
 
             self.local_broker.subscribe(src_topic, forward_handler)
         except Exception as e:
-            print(f"An error occurred while forwarding from {src_topic} to {dst_topic}: {e}")
+            print(f"An error occurred while forwarding from {src_topic} to {dst_topic}: {e}")
+
+    def __wrapData(self, msg : str):
+        result = {}
+        data = json.loads(msg)
+        result["timestamp"] = int(time.time())
+        result["systemId"] = self.client_id
+        result["data"] = {}
+        for keys in data:
+            result["data"][keys] = data[keys]
+

rpi/services/mqtt_service.py

@@ -65,11 +65,7 @@ class MQTTService:
     def publish(self, topic: str, data: str, qos: int = 0):
         try:
             self.connect()
-            payload = {
-                "timestamp": int(time.time()),
-                "data": data
-            }
-            result = self.client.publish(topic, json.dumps(payload), qos=qos)
+            result = self.client.publish(topic, json.dumps(data), qos=qos)
             result.wait_for_publish()
         except Exception as e:
             print(f"An error occurred while publishing on {topic} on {self.address} : {e}")