New Callbacks example + Added Nano 33 IoT to boards list in examples comment

examples/ArduinoIoTCloud-Advanced/ArduinoIoTCloud-Advanced.ino

@@ -7,6 +7,7 @@
    - MKR GSM 1400
    - MKR NB 1500
    - MKR WAN 1300/1310
+   - Nano 33 IoT
    - ESP 8266
 */
 

examples/ArduinoIoTCloud-Basic/ArduinoIoTCloud-Basic.ino

@@ -16,6 +16,7 @@
    - MKR GSM 1400
    - MKR NB 1500
    - MKR WAN 1300/1310
+   - Nano 33 IoT
    - ESP 8266
 */
 

examples/ArduinoIoTCloud-Callbacks/ArduinoIoTCloud-Callbacks.ino

@@ -0,0 +1,80 @@
+/*
+  This sketch demonstrates how to subscribe to IoT Cloud events and perform actions
+  The available events are
+
+  CONNECT     : Board successfully connects to IoT Cloud
+  SYNC        : Data is successfully synced between Board and IoT Cloud
+  DISCONNECT  : Board has lost connection to IoT Cloud
+
+  You don't need any specific Properties to be created in order to demonstrate these functionalities.
+  Simply create a new Thing and give it 1 arbitrary Property.
+  Remember that the Thing ID needs to be configured in thingProperties.h 
+  These events can be very useful in particular cases, for instance to disable a peripheral
+  or a connected sensor/actuator when no data connection is available, as well as to perform
+  specific operations on connection or right after properties values are synchronised.
+
+  To subscribe to an event you can use the `addCallback` method and specify
+  which event will trigger which custom function.
+  One function per event can be assigned.
+
+  IMPORTANT:
+  This sketch works with WiFi, GSM, NB and Lora enabled boards supported by Arduino IoT Cloud.
+  On a LoRa board, if it is configuered as a class A device (default and preferred option), values from Cloud dashboard are received
+  only after a value is sent to Cloud.
+
+  This sketch is compatible with:
+   - MKR 1000
+   - MKR WIFI 1010
+   - MKR GSM 1400
+   - MKR NB 1500
+   - MKR WAN 1300/1310
+   - Nano 33 IoT
+   - ESP 8266
+*/
+
+#include "arduino_secrets.h"
+#include "thingProperties.h"
+
+void setup() {
+  /* Initialize serial and wait up to 5 seconds for port to open */
+  Serial.begin(9600);
+  for(unsigned long const serialBeginTime = millis(); !Serial && (millis() - serialBeginTime > 5000); ) { }
+
+  /* This function takes care of connecting your sketch variables to the ArduinoIoTCloud object */
+  initProperties();
+
+  /* Initialize Arduino IoT Cloud library */
+  ArduinoCloud.begin(ArduinoIoTPreferredConnection);
+
+  /*
+      Invoking `addCallback` on the ArduinoCloud object allows you to subscribe
+      to any of the available events and decide which functions to call when they are fired.
+
+      The functions `doThisOnConnect`, `doThisOnSync`, `doThisOnDisconnect`
+      are custom functions and can be named to your likings and for this example
+      they are defined/implemented at the bottom of the Sketch
+  */
+  ArduinoCloud.addCallback(ArduinoIoTCloudEvent::CONNECT, doThisOnConnect);
+  ArduinoCloud.addCallback(ArduinoIoTCloudEvent::SYNC, doThisOnSync);
+  ArduinoCloud.addCallback(ArduinoIoTCloudEvent::CONNECT, doThisOnDisconnect);
+
+  setDebugMessageLevel(DBG_INFO);
+  ArduinoCloud.printDebugInfo();
+}
+
+void loop() {
+  ArduinoCloud.update();
+}
+
+void doThisOnConnect(){
+  /* add your custom code here */
+  Serial.println("Board successfully connected to Arduino IoT Cloud");
+}
+void doThisOnSync(){
+  /* add your custom code here */
+  Serial.println("Thing Properties synchronised");
+}
+void doThisOnDisconnect(){
+  /* add your custom code here */
+  Serial.println("Board disconnected from Arduino IoT Cloud");
+}

examples/ArduinoIoTCloud-Callbacks/arduino_secrets.h

@@ -0,0 +1,34 @@
+#include <Arduino_ConnectionHandler.h>
+
+/* MKR1000, MKR WiFi 1010 */
+#if defined(BOARD_HAS_WIFI)
+  #define SECRET_SSID "YOUR_WIFI_NETWORK_NAME"
+  #define SECRET_PASS "YOUR_WIFI_PASSWORD"
+#endif
+
+/* ESP8266 */
+#if defined(BOARD_ESP8266)
+  #define SECRET_DEVICE_KEY "my-device-password"
+#endif
+
+/* MKR GSM 1400 */
+#if defined(BOARD_HAS_GSM)
+  #define SECRET_PIN ""
+  #define SECRET_APN ""
+  #define SECRET_LOGIN ""
+  #define SECRET_PASS ""
+#endif
+
+/* MKR WAN 1300/1310 */
+#if defined(BOARD_HAS_LORA)
+  #define SECRET_APP_EUI ""
+  #define SECRET_APP_KEY ""
+#endif
+
+/* MKR NB 1500 */
+#if defined(BOARD_HAS_NB)
+  #define SECRET_PIN ""
+  #define SECRET_APN ""
+  #define SECRET_LOGIN ""
+  #define SECRET_PASS ""
+#endif

examples/ArduinoIoTCloud-Callbacks/thingProperties.h

@@ -0,0 +1,33 @@
+#include <ArduinoIoTCloud.h>
+#include <Arduino_ConnectionHandler.h>
+
+#if defined(BOARD_HAS_WIFI)
+#elif defined(BOARD_HAS_GSM)
+#elif defined(BOARD_HAS_LORA)
+#elif defined(BOARD_HAS_NB)
+#else
+  #error "Arduino IoT Cloud currently only supports MKR1000, MKR WiFi 1010, MKR WAN 1300/1310, MKR NB 1500 and MKR GSM 1400"
+#endif
+
+#define THING_ID "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+
+/* BOARD_ID is only required if you are using an ESP8266 */
+#define BOARD_ID "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+
+void initProperties() {
+#if defined(BOARD_ESP8266)
+  ArduinoCloud.setBoardId(BOARD_ID);
+  ArduinoCloud.setSecretDeviceKey(SECRET_DEVICE_KEY);
+#endif
+  ArduinoCloud.setThingId(THING_ID);
+}
+
+#if defined(BOARD_HAS_WIFI)
+  WiFiConnectionHandler ArduinoIoTPreferredConnection(SECRET_SSID, SECRET_PASS);
+#elif defined(BOARD_HAS_GSM)
+  GSMConnectionHandler ArduinoIoTPreferredConnection(SECRET_PIN, SECRET_APN, SECRET_LOGIN, SECRET_PASS);
+#elif defined(BOARD_HAS_LORA)
+  LoRaConnectionHandler ArduinoIoTPreferredConnection(SECRET_APP_EUI, SECRET_APP_KEY, _lora_band::EU868, _lora_class::CLASS_A);
+#elif defined(BOARD_HAS_NB)
+  NBConnectionHandler ArduinoIoTPreferredConnection(SECRET_PIN, SECRET_APN, SECRET_LOGIN, SECRET_PASS);
+#endif