MQTT client rcommand completion

include/mqttclient.h

@@ -5,6 +5,7 @@
 #include "rcommand.h"
 #include <MQTT.h>
 #include <ETH.h>
+#include <mbedtls/base64.h>
 
 #ifndef MQTT_CLIENTNAME
 #define MQTT_CLIENTNAME clientId
@@ -17,8 +18,7 @@ uint32_t mqtt_queuewaiting(void);
 void mqtt_queuereset(void);
 void mqtt_client_task(void *param);
 int mqtt_connect(const char *my_host, const uint16_t my_port);
-void mqtt_callback(MQTTClient *client, char topic[], char payload[],
-                   int length);
+void mqtt_callback(MQTTClient *client, char *topic, char *payload, int length);
 void NetworkEvent(WiFiEvent_t event);
 esp_err_t mqtt_init(void);
 void mqtt_deinit(void);