Fix for #1901, Thanks @pro100805

Author: imbeacon

thingsboard_gateway/gateway/tb_gateway_service.py

@@ -1397,9 +1397,12 @@ def __send_data_pack_to_storage(self, data, connector_name, connector_id=None):
         if isinstance(data, ConvertedData):
             if self.__latency_debug_mode:
                 data.add_to_metadata({"putToStorageTs": int(time() * 1000)})
-            json_data = dumps(data.to_dict(self.__latency_debug_mode), separators=(',', ':'), skipkeys=True)
+            json_data = dumps(data.to_dict(self.__latency_debug_mode),
+                              separators=(',', ':'),
+                              skipkeys=True,
+                              ignore_nan=True)
         else:
-            json_data = dumps(data, separators=(',', ':'), skipkeys=True)
+            json_data = dumps(data, separators=(',', ':'), skipkeys=True, ignore_nan=True)
         save_result = self._event_storage.put(json_data)
         tries = 4
         current_try = 0