A Speech Recognition Module Better than LD3320: LU-ASR01 tutorial

				
					#include "asr.h"                // TianwenBlock Speech Recognition (ASR) core library
#include "setup.h"             // Development board initialization auxiliary library
#include "mylib/luxiaoban.h"    // Luxiaoban hardware driver library

/******Global Configuration (Consistent with graphic block parameters) ******/
uint32_t snid;               // Voice command ID (Automatically assigned by TianwenBlock)
const uint8_t LIGHT_IO = 1; // Light control IO port (Matches graphic block "I/O Selection = I/O1")
const uint16_t PLAY_WELCOME = 10001;  // Welcome voice ID (Graphic block config: Welcome)
const uint16_t PLAY_BYE = 10002;       // Exit voice ID (Graphic block config: Goodbye)
const uint16_t PLAY_WAKE = 10003;     // Wake-up response ID (Hello there)
const uint16_t PLAY_OPEN = 10004;     // Light-on response ID (Okay)
const uint16_t PLAY_CLOSE = 10005;     // Light-off response ID (No problem)
const unsigned long EXIT_DELAY = 10000; // Exit delay (10 seconds, matches graphic block)

/***********Core Function: Voice Command Processing *************/
void ASR_CODE() {
  // 1. Wake-up word: ID=500 (Command ID for "Hello" in graphic block)
  if (snid == 500) {
    luxiaoban_play_voice(PLAY_WAKE);    // Play "Hello there"
    Serial.println("[Command Executed] Wake-up successful, response: Hello there");
  }

  // 2. Command word: Turn on light (ID=501)
  if (snid == 501) {
    luxiaoban_digital_write(LIGHT_IO, 1); // Set IO1 to high level (Turn on light)
    luxiaoban_play_voice(PLAY_OPEN);      // Play "Okay"
    Serial.println("[Command Executed] Light turned on successfully, response: Okay");
  }

  // 3. Command word: Turn off light (ID=502)
  if (snid == 502) {
    luxiaoban_digital_write(LIGHT_IO, 0); // Set IO1 to low level (Turn off light)
    luxiaoban_play_voice(PLAY_CLOSE);     // Play "No problem"
    Serial.println("[Command Executed] Light turned off successfully, response: No problem");
  }
}

/*************Initialization Function (Executed once on startup) *************/
void setup() {
  // 1. Serial port initialization (Baud rate 9600, matches graphic block config)
  Serial.begin(9600);
  while(!Serial); // Wait for serial port to be ready (Only required for USB development boards)

  // 2. Hardware IO initialization (Configure IO1 as output mode)
  luxiaoban_pin_mode(LIGHT_IO, OUTPUT);
  luxiaoban_digital_write(LIGHT_IO, 0); // Initial state: Light off

  // 3. Voice module initialization (Automatically encapsulated by TianwenBlock, prompt only)
  luxiaoban_asr_init();    // Initialize speech recognition module
  luxiaoban_voice_init();  // Initialize voice broadcast module

  // 4. Startup welcome
  luxiaoban_play_voice(PLAY_WELCOME);
  Serial.println("[System] Initialization completed, playing startup voice: Welcome");
  Serial.println("[System] Waiting for voice commands (Hello/Turn on light/Turn off light)...");
}

/***************Main Loop Function (Executed in infinite loop) ***************/
void loop() {
  // 1. Execute voice command logic
  ASR_CODE();

  // 2. 10-second no-operation exit logic
  static unsigned long last_cmd_time = millis(); // Record time of last command
  // Detect valid command (snid≠0) and update last operation time
  if (snid != 0) {
    last_cmd_time = millis();
    snid = 0; // Reset snid to avoid repeated execution
  }
  // Play "Goodbye" if no command for over 10 seconds
  if (millis() - last_cmd_time > EXIT_DELAY) {
    luxiaoban_play_voice(PLAY_BYE);
    Serial.println("[System] No operation for 10 seconds, playing: Goodbye");
    last_cmd_time = millis(); // Reset timer to avoid repeated playback
  }

  // 3. Reduce CPU usage (Necessary delay)
  delay(20);
}