upgrad esp mqtt lib

lib/espMqttClient/docs/index.md

@@ -66,7 +66,7 @@ espMqttClientAsync()
 ```
 
 Instantiate a new espMqttClient or espMqttSecure object.
-On ESP32, two optional parameters are available: `espMqttClient(uint8_t priority = 1, uint8_t core = 1)`. This will change the priority of the MQTT client task and the core on which it runs (higher priority = more cpu-time).
+On ESP32, three optional parameters are available: `espMqttClient(bool internalTask = true, uint8_t priority = 1, uint8_t core = 1)`. By default, espMqttclient creates its own task to manage TCP. By setting `internalTask` to false, no task will be created and you will be responsible yourself to call `espMqttClient.loop()`. `priority` changes the priority of the MQTT client task and the core on which it runs (higher priority = more cpu-time).
 
 For the asynchronous version, use `espMqttClientAsync`.
 
@@ -150,6 +150,15 @@ Set the server.
 - **`host`**: Host of the server, expects a null-terminated char array (c-string)
 - **`port`**: Port of the server
 
+```cpp
+espMqttClient& setTimeout(uint16_t timeout)
+```
+
+Set the timeout for packets that need acknowledgement. Defaults to 10 seconds.
+When no acknowledgement has been received from the broker after sending a packet, the client will retransmit **all** the packets in the queue.
+
+* **`timeout`**: Timeout in seconds
+
 #### Options for TLS connections
 
 All common options from WiFiClientSecure to setup an encrypted connection are made available. These include:
@@ -324,7 +333,7 @@ Keep in mind that this may also delete any session data and therefore is not MQT
 void loop()
 ```
 
-This is the worker function of the MQTT client. For ESP8266 you must call this function in the Arduino loop. For ESP32 this function is only used internally and is not available in the API.
+This is the worker function of the MQTT client. For ESP8266 you must call this function in the Arduino loop. For ESP32 you have to call this function yourself **only if you have disabled the internal task** (see the constructors).
 
 ```cpp
 const char* getClientId() const