diff --git a/apps/iot/src/iot_host.erl b/apps/iot/src/iot_host.erl
index d3ba532..8724357 100644
--- a/apps/iot/src/iot_host.erl
+++ b/apps/iot/src/iot_host.erl
@@ -176,7 +176,7 @@ handle_event({call, From}, {publish_message, ReceiverPid, CommandType, {aes, Com
 
     {keep_state, State, [{reply, From, {ok, Ref}}]};
 
-handle_event({call, From}, {publish_message, ReceiverPid, CommandType, Command}, _, State = #state{channel_pid = ChannelPid}) when is_binary(Command) ->
+handle_event({call, From}, {publish_message, ReceiverPid, CommandType, Command}, _, State = #state{channel_pid = ChannelPid}) when is_binary(Command), is_pid(ChannelPid) ->
     %% 通过websocket发送请求
     Ref = ws_channel:publish(ChannelPid, ReceiverPid, <<CommandType:8, Command/binary>>),