button_or_keyword_trigger_mode.ino

/**
 * @example button_or_keyword_trigger_mode.ino
 */
 
#include <Arduino.h>
#include <Wire.h>
 
#include "speech_recognizer.h"
 
namespace {
emakefun::SpeechRecognizer g_speech_recognizer(emakefun::SpeechRecognizer::kDefaultI2cAddress);
 
String EventToString(emakefun::SpeechRecognizer::Event event) {
  switch (event) {
    case emakefun::SpeechRecognizer::kEventStartWaitingForTrigger:
      return F("start waiting for trigger");
    case emakefun::SpeechRecognizer::kEventStartRecognizing:
      return F("start recognizing");
    case emakefun::SpeechRecognizer::kEventSpeechRecognized:
      return F("speech recognized");
    case emakefun::SpeechRecognizer::kEventSpeechRecognitionTimedOut:
      return F("speech recognition timedout");
    case emakefun::SpeechRecognizer::kEventButtonTriggered:
      return F("button triggered");
    case emakefun::SpeechRecognizer::kEventKeywordTriggered:
      return F("keyword triggered");
    default:
      return F("none");
  }
}
}  // namespace
 
void setup() {
  Serial.begin(115200);
  Serial.println("setup");
  Wire.begin();
  const auto ret = g_speech_recognizer.Initialize(&Wire);
  if (0 == ret) {
    Serial.println(F("speech recognizer initialization was successful"));
  } else {
    Serial.println(String(F("speech recognizer initialization failed: ")) + ret);
    while (true)
      ;
  }
  g_speech_recognizer.SetRecognitionMode(emakefun::SpeechRecognizer::kKeywordOrButtonTrigger);
  g_speech_recognizer.SetTimeout(10000);
  g_speech_recognizer.AddKeyword(0, F("xiao yi xiao yi"));
  g_speech_recognizer.AddKeyword(1, F("bei jing"));
  g_speech_recognizer.AddKeyword(2, F("shang hai"));
  g_speech_recognizer.AddKeyword(3, F("cheng du"));
  Serial.println(F("setup was successful"));
}
 
void loop() {
  const auto result = g_speech_recognizer.Recognize();
  if (result >= 0) {
    Serial.print(F("result: "));
    Serial.println(result);
  }
 
  if (g_speech_recognizer.GetEvent() != emakefun::SpeechRecognizer::kEventNone) {
    Serial.print(F("event: "));
    Serial.println(EventToString(g_speech_recognizer.GetEvent()));
  }
}