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Cloud Platforms

Arduino IoT Cloud

HTTP

Things

  1. Create thing
  2. Create variables
  3. Select devices
  4. Select network
  5. Set timezone
  6. Full code editor

Dashboards

  1. Create dashboard
  2. Add widgets

Mobile App

Arduino IoT Cloud Remote

Uploading code locally

Install ArduinoIoTCloud library

Blynk

HTTP

blynk.cloud

  1. Create account
  2. Create new template
  3. Create new data stream > Virtual Pin
  4. Digital: Input only
  5. Analog: Input only
  6. Virtual Pin: Input/Output
  7. Install Blynk library

ThingSpeak

Developed by MathWorks, the same company that developed Matlab

Uses HTTP Read and Write requests

AdaFruit IO

Uses MQTT

Subscribe

Adafruit_MTT_Client mqtt(&client, server, port, user, key);
Adafruit_MTT_Subscribe toggle = Adafruit_MTT_Subscribe(
  &mqtt,
  user"/feeds/led"
);

void mqtt_connect() {
  if(mqtt.connected()){
    return ;
  }

  Serial.println("Connecting to MQTT...");

  int retries = 3, status;

  while(
    (status = mqtt.connect()) != 0
  ) {
    Serial.println(mqtt.connectErrorString(status));
    Serial.println("Retrying after 5sec");

    delay(5000);
    retries--;

    if(retries == 0) {
      while(1); // reset NodeMCU
    }
  }

  Serial.println("MQTT connected");
  mqtt.subscribe(&toggle);
}

void setup() {
  Serial.begin(9600);
  pinMode(D2, OUTPUT);
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, pass);
  while(WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }
  Serial.println("WiFi connected!")
}

void loop() {
  mqtt_connect();
  Adafruit_MTT_Subscribe *subscription;

  while(subscription = mqtt.readSubscription(5000)) {
    if(subscription == &toggle) {
      char* data = (char*) toggle.lastread;
      Serial.println(data);
    }
  }
}

Publish

Adafruit_MTT_Client mqtt(&client, server, port, user, key);
Adafruit_MTT_Publish gauge = Adafruit_MTT_Publish(
  &mqtt,
  user"/feeds/sensor"
);

int data;

void mqtt_connect() {
  if(mqtt.connected()){
    return ;
  }

  Serial.println("Connecting to MQTT...");

  int retries = 3, status;

  while(
    (status = mqtt.connect()) != 0
  ) {
    Serial.println(mqtt.connectErrorString(status));
    Serial.println("Retrying after 5sec");

    delay(5000);
    retries--;

    if(retries == 0) {
      while(1); // reset NodeMCU
    }
  }

  Serial.println("MQTT connected");
}

void setup() {
  Serial.begin(9600);
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, pass);
  while(WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }
  Serial.println("WiFi connected!")
}

void loop() {
  mqtt_connect();

  data = 100;

  if(gauge.publish(data)) {
    Serial.println("Published successful: " + String(data));
  } else {
    Serial.println("Published failed: " + String(data));
  }
  delay(5000);
}

IFTTT

  • WebHooks for HTTP Requests

AWS IoT Core

2024-05-12

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