修改场站策略解析及网关指令下发

src/protocol/MqttEntity.cpp

@@ -194,6 +194,8 @@ void MqttClient::subscribe()
 
 int MqttClient::publish(std::string topic, std::string text)
 {
+	if (!client) return 0;
+
 	MQTTAsync_responseOptions options = MQTTAsync_responseOptions_initializer;
 	options.onSuccess = [](void* context, MQTTAsync_successData* response) {};
 	options.onFailure = [](void* context, MQTTAsync_failureData* response) {};