JavaScript library for MQTT on Mbed OS
npm install mbed-js-st-mqttSee this project for more information: mbed-js-x-nucleo-iks01a2-mqtt-example
* Install this library using npm (Node package manager) with the following command:
``
cd project_path
npm install syed-zeeshan/mbed-js-mqtt
// Instantiate HTS221 library
var mqtt = new MQTT_JS();// Initialize MQTT
mqtt.init(str_id, str_password, str_url, str_port);
// Subscribe to MQTT broker
mqtt.subscribe(str_topic);
// Set Subscription callback
mqtt.onSubscribe(fn_callback);
// Connect to MQTT broker
mqtt.connect();
// Publish data to MQTT broker
mqtt.publish(str_data);
// Yield data from MQTT broker
mqtt.yield(int_time);
Example
// Instantiate HTS221 library
var mqtt = new MQTT_JS();// Initialize MQTT
mqtt.init('id', 'password', 'url', 'port');
// Subscribe to MQTT broker
mqtt.subscribe('topic');
// Set Subscription callback
mqtt.onSubscribefunction(data) {
print('MQTT callback result: ' + data);
});
// Connect to MQTT broker
mqtt.connect();
// Publish data to MQTT broker
var data = {
'key': 'value'
};
if(mqtt.publish(JSON.stringify(data)) == 0){
print('Published successfully!');
}
else{
print('Publishing failed!');
}
// Yield data from MQTT broker
mqtt.yield(500); // Wait for 500ms