fix：蓝牙网管扫描

api/gateway/gateway.go

@@ -592,11 +592,14 @@ func WriteDataEmq(c *gin.Context) {
 // @Success 200 {string} string "ok"
 // @Router /v2/gateway/find [get]
 func FindGateway(c *gin.Context) {
-	marshal, err := json.Marshal(global.GatewayList)
-	if err != nil {
-		return
+
+	var gateways []gateway.GatewayInfo
+	if len(global.DeviceMap) > 0 {
+		for _, deviceInfo := range global.GatewayList {
+			gateways = append(gateways, deviceInfo)
+		}
 	}
-	response.Success("查询网关设备完成", marshal, c)
+	response.Success("查询网关设备完成", gateways, c)
 	return
 }