113 lines
3 KiB
Arduino
113 lines
3 KiB
Arduino
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/**
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* @file communication-mqtt-send.ino
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* @author Phil Schatzmann
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* @brief Send Audio File to MQTT.
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* I am using the ArduinoMQTTClient library from Arduino provided by the library manager.
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* We can just copy the audio data to the MQTT client!
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* @version 0.1
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* @date 2023-09-07
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*
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* @copyright Copyright (c) 2023
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*/
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#include "WiFi.h"
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#include "ArduinoMqttClient.h"
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#include "AudioTools.h"
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#define SIZE 1024
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#define N 100
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// Communication
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const char* ssid = "SSID"; // your network SSID (name)
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const char* password = "PASSWORD"; // your network password (use for WPA, or use as key for WEP)
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const char* broker = "test.mosquitto.org";
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const char* topic = "audio.wav";
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int port = 1883;
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WiFiClient wifiClient;
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MqttClient mqttClient(wifiClient);
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// Audio
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AudioInfo info(8000, 1, 16);
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WhiteNoiseGenerator<int16_t> noise(32000); // subclass of SoundGenerator with max amplitude of 32000
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GeneratedSoundStream<int16_t> in_stream(noise); // Stream generated from noise
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EncodedAudioStream out_stream(&mqttClient, new WAVEncoder()); // encode as wav file
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StreamCopy copier(out_stream, in_stream, SIZE); // copies sound to MQTT client
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// Connect to Wifi
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void connectWIFI() {
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// attempt to connect to WiFi network:
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Serial.print("Attempting to connect to WPA SSID: ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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Serial.print("Connecting to WiFi ..");
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while (WiFi.status() != WL_CONNECTED) {
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Serial.print('.');
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delay(1000);
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}
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Serial.println("You're connected to the network");
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Serial.println();
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}
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// Connect to MQTT Server
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void connectMQTT() {
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// You can provide a unique client ID, if not set the library uses Arduino-millis()
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// Each client must have a unique client ID
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mqttClient.setId("AudioTools");
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// You can provide a username and password for authentication
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// mqttClient.setUsernamePassword("username", "password");
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Serial.print("Attempting to connect to the MQTT broker: ");
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Serial.println(broker);
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if (!mqttClient.connect(broker, port)) {
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Serial.print("MQTT connection failed! Error code = ");
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Serial.println(mqttClient.connectError());
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stop();
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}
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Serial.println("You're connected to the MQTT broker!");
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Serial.println();
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}
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// Send audio to MQTT Server
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void sendMQTT() {
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// make sure that we write wav header
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out_stream.begin(info);
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// send message, the Print interface can be used to set the message contents
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mqttClient.beginMessage(topic, SIZE * N, true);
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// copy audio data to mqtt: 100 * 1024 bytes
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copier.copyN(N);
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mqttClient.endMessage();
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}
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void setup() {
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// Initialize logger
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// connect
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connectWIFI();
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connectMQTT();
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// setup audio
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noise.begin(info);
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in_stream.begin(info);
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// send Audio
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sendMQTT();
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}
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void loop() {
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// call poll() regularly to allow the library to send MQTT keep alives which
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// avoids being disconnected by the broker
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mqttClient.poll();
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delay(1000);
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}
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