fix(iot): 优化设备控制指令发送功能

- 将设备信息获取方式改为使用 detail 方法，提高代码复用性
-增加对参数为空的校验，避免发送空命令
-

src/main/java/com/zsc/edu/gateway/modules/iot/device/service/impl/DeviceServiceImpl.java

@@ -195,7 +195,7 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceRepository, Device> imp
 
     @Override
     public String send(Long deviceId, Integer qos, JSONObject paras) throws JSONException {
-        Device device = deviceRepo.selectOne(new LambdaQueryWrapper<Device>().eq(Device::getId, deviceId));
+        DeviceVo device = detail(deviceId);
         JSONObject payloadJson = new JSONObject();
         payloadJson.put("mid", 641);
         payloadJson.put("serviceId", "runParamsCommand");
@@ -205,6 +205,9 @@ public class DeviceServiceImpl extends ServiceImpl<DeviceRepository, Device> imp
         payloadJson.put("msgType", "cloudReq");
         String payload = payloadJson.toString();
         String topic = "/r1/devices/" + device.getClientId() + "/datas";
+        if (paras.isEmpty()) {
+            throw new JSONException("参数不能为空");
+        }
         try {
             mqttSender.sendMsg(topic, qos, payload);
         } catch (Exception e) {