Initial commit of Arduino libraries

ArduinoMqttClient/examples/WiFiSimpleReceiveCallback/WiFiSimpleReceiveCallback.ino

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+/*
+  ArduinoMqttClient - WiFi Simple Receive Callback
+
+  This example connects to a MQTT broker and subscribes to a single topic.
+  When a message is received it prints the message to the Serial Monitor,
+  it uses the callback functionality of the library.
+
+  The circuit:
+  - Arduino MKR 1000, MKR 1010 or Uno WiFi Rev2 board
+
+  This example code is in the public domain.
+*/
+
+#include <ArduinoMqttClient.h>
+#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_AVR_UNO_WIFI_REV2)
+  #include <WiFiNINA.h>
+#elif defined(ARDUINO_SAMD_MKR1000)
+  #include <WiFi101.h>
+#elif defined(ARDUINO_ARCH_ESP8266)
+  #include <ESP8266WiFi.h>
+#elif defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_NICLA_VISION) || defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_GIGA) || defined(ARDUINO_OPTA)
+  #include <WiFi.h>
+#elif defined(ARDUINO_PORTENTA_C33)
+  #include <WiFiC3.h>
+#elif defined(ARDUINO_UNOR4_WIFI)
+  #include <WiFiS3.h>
+#endif
+
+#include "arduino_secrets.h"
+///////please enter your sensitive data in the Secret tab/arduino_secrets.h
+char ssid[] = SECRET_SSID;    // your network SSID (name)
+char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
+
+// To connect with SSL/TLS:
+// 1) Change WiFiClient to WiFiSSLClient.
+// 2) Change port value from 1883 to 8883.
+// 3) Change broker value to a server with a known SSL/TLS root certificate 
+//    flashed in the WiFi module.
+
+WiFiClient wifiClient;
+MqttClient mqttClient(wifiClient);
+
+const char broker[] = "test.mosquitto.org";
+int        port     = 1883;
+const char topic[]  = "arduino/simple";
+
+void setup() {
+  //Initialize serial and wait for port to open:
+  Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+
+  // attempt to connect to WiFi network:
+  Serial.print("Attempting to connect to WPA SSID: ");
+  Serial.println(ssid);
+  while (WiFi.begin(ssid, pass) != WL_CONNECTED) {
+    // failed, retry
+    Serial.print(".");
+    delay(5000);
+  }
+
+  Serial.println("You're connected to the network");
+  Serial.println();
+
+  // You can provide a unique client ID, if not set the library uses Arduino-millis()
+  // Each client must have a unique client ID
+  // mqttClient.setId("clientId");
+
+  // You can provide a username and password for authentication
+  // mqttClient.setUsernamePassword("username", "password");
+
+  Serial.print("Attempting to connect to the MQTT broker: ");
+  Serial.println(broker);
+
+  if (!mqttClient.connect(broker, port)) {
+    Serial.print("MQTT connection failed! Error code = ");
+    Serial.println(mqttClient.connectError());
+
+    while (1);
+  }
+
+  Serial.println("You're connected to the MQTT broker!");
+  Serial.println();
+
+  // set the message receive callback
+  mqttClient.onMessage(onMqttMessage);
+
+  Serial.print("Subscribing to topic: ");
+  Serial.println(topic);
+  Serial.println();
+
+  // subscribe to a topic
+  mqttClient.subscribe(topic);
+
+  // topics can be unsubscribed using:
+  // mqttClient.unsubscribe(topic);
+
+  Serial.print("Waiting for messages on topic: ");
+  Serial.println(topic);
+  Serial.println();
+}
+
+void loop() {
+  // call poll() regularly to allow the library to receive MQTT messages and
+  // send MQTT keep alives which avoids being disconnected by the broker
+  mqttClient.poll();
+}
+
+void onMqttMessage(int messageSize) {
+  // we received a message, print out the topic and contents
+  Serial.println("Received a message with topic '");
+  Serial.print(mqttClient.messageTopic());
+  Serial.print("', length ");
+  Serial.print(messageSize);
+  Serial.println(" bytes:");
+
+  // use the Stream interface to print the contents
+  while (mqttClient.available()) {
+    Serial.print((char)mqttClient.read());
+  }
+  Serial.println();
+
+  Serial.println();
+}

ArduinoMqttClient/examples/WiFiSimpleReceiveCallback/arduino_secrets.h

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+#define SECRET_SSID ""
+#define SECRET_PASS ""