Arduino IDE library packaging modification

#579
Update doc to reflect necessary manual changes
Implement a part of these changes to automatic script

docs/upload/arduino-ide.md

@@ -6,7 +6,18 @@
 * Download OpenMQTTGateway code (OpenMQTTGateway_sources.zip) from the [release page](https://github.com/1technophile/OpenMQTTGateway/releases) and unzip it
 * Download the libraries package corresponding to your board and module wished into the same page (example esp32-m5stick-c-ble-libraries.zip)
 * Unzip the libraries into your arduino libraries folder (example D:/Users/XXXX/Documents/Arduino/libraries)
-* Open the file main.ino from OpenMQTTGateway/main folder
+* If you are using an ESP, Mega or other powerfull board; Open the *PubSubClient* folder, open the file src/PubSubClient.h, replace 
+```C++
+#define MQTT_MAX_PACKET_SIZE 128
+```
+by
+```C++
+#define MQTT_MAX_PACKET_SIZE 1024
+```
+This modification will enable to send and receive by MQTT long json messages.
+
+* If necessary replace the spaces into each library folder by _: example rename “ESP32 BLE Arduino” folder to “ESP32_BLE_Arduino”
+* Open the file main.ino from OpenMQTTGateway/main folder with the arduino IDE
 * Change the settings and the desired gateways into user_config.h (uncomment the modules you want)
 
 *Example for the use of RF gateway*
@@ -21,6 +32,7 @@
 * Change the pins or parameters corresponding to the modules choosen, for RF you can change the pins into config_RF.h
 * Choose the board on the Arduino IDE
 * Select the port corresponding to the board
+* Note that for using BLE on ESP32 you will need to select *Minimal SPIFFS* into Tools->Partition Scheme
 * Open the serial monitor and set 115200 bauds
 * Upload ➡️
 * You should see the logs into the serial monitor