diff --git a/apps/counter/api/serializers.py b/apps/counter/api/serializers.py
index 8cc1217..11c7331 100644
--- a/apps/counter/api/serializers.py
+++ b/apps/counter/api/serializers.py
@@ -250,7 +250,7 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
         # 区分一代和二代设备
         if obj.chip_type == 'AIR-V2':
             if self.mosq_device_info and self.mosq_device_info.count:
-                return self.mosq_device_info.count
+                return str(self.mosq_device_info.count)
 
         if self.latest:
             return self.latest['count']
@@ -260,7 +260,7 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
         # 区分一代和二代设备
         if obj.chip_type == 'AIR-V2':
             if self.mosq_device_info and self.mosq_device_info.signal:
-                return self.mosq_device_info.signal
+                return str(self.mosq_device_info.signal)
 
         if self.latest:
             return self.latest['csq']
@@ -270,7 +270,7 @@ class DeviceInfoSerializer(serializers.ModelSerializer):
         # 区分一代和二代设备
         if obj.chip_type == 'AIR-V2':
             if self.mosq_device_info and self.mosq_device_info.energy:
-                return self.mosq_device_info.energy
+                return str(self.mosq_device_info.energy)
 
         if self.latest:
             if float(self.latest['vol']) <= 100: