Anxin can internally test offline voice module vb-01 to communicate with esp-c3-12f

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Preface

        Last month, I showed you how to use ESP-C3-12F To control WS2812 RGB Light Bar ( Anxinco ESP32-C3 Module Alibaba cloud remote control WS2812RGB Light Bar （ be based on ESP-IDF Of SDK）), The third section mentioned VB-01 This module . Because the module was still completely confidential , It is not allowed to make too many introductions .
        And this blog will not mention how to do secondary development of modules , Only external MCU How to communicate with VB-01 communicate .

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One 、VB-01 Module introduction

       VB-01 It is an upcoming product of Anxin Ke Offline voice control module , And bring your own bill MIC Input and single speaker output . Users can directly put 2 Linear MIC and 2 Line speaker access , No need to attach Power amplifier circuit and MIC Filter circuit , Control commands can be controlled by intelligent AI Voice decoding .
        Bloggers test their experience , The probability of false identification is still quite small , Almost none, so to speak . Given that it is still in a confidential state , Bloggers don't show VB-01 The true face of （VB-01 Soon, an official treasure of Anxin will be on the shelves , You can pay attention to it , The link is at the end of this article ）. In order to cooperate with the following , Only pin diagram can be given .

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Two 、 Communication serial port selection

1. Communication serial port introduction

        VB-01 A total of three groups of serial ports are given : RX0_5V-TXD0_5V、RXD0_3V3-TXD0_3V3 and RXD1-TXD1. among ,RX0_5V-TXD0_5V、RXD0_3V3-TXD0_3V3 It's common. UART0, It's also MCU Communication interface ,. and TXD1 and RXD1 yes UART1 For downloading programs .

2.UART0

        VB-01 And the outside MCU Communication interface is recommended UART0, Default baud rate ：38400, That's what this is : RX0_5V-TXD0_5V、RXD0_3V3-TXD0_3V3.

3. Print information description

        UART0 The printed content of is as follows ：

ASR Result:  Hello, Wei    // In Chinese Windows  Environmental presentation   Garbled status 
Wakeup: Hello, Wei 		   // In Chinese Windows  Environmental presentation   Garbled status 
Send data len:4
Send uart data:0xAA 01 00 BB 
ReadmePlay ID: 4

All the information printed is in String mode Print .

        ASR Result: For is the instruction to be received
        Wakeup: For wake-up command Other instructions will not print this
        Send data len: Number of bytes of data sent
        Send uart data: Data sent
        ReadmePlay ID: Play the prompt tone ID Number
notes ： The data sent and the prompt sound played are usually one-to-one correspondence .

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3、 ... and 、ESP-C3-12F End and VB-01 Data interaction

        ESP-C3-12F The role of is external MCU, The purpose is to show more intuitively VB-01 The voice recognition function of .

1. Read instructions and parse control

         From the previous section VB-01 Print the information to see ： There are two ways to identify control ：
        1. analysis VB-01 Data sent ： for example ：0xAA 01 00 BB;
        2. Analyze the prompt tone ID Number ：
Both ways are possible . Bloggers think the second way is easier , And flexible , The first way is more complex , But it will also be more reliable .
         There is another reason to choose the second way because ID Number It also represents the prompt tone , And it's a string number , have access to atoi() Function is directly converted to an integer number . ESP-C3-12F Data parsing code ：

int uartDataHandle(uint8_t *data)
{
    
	uint8_t *temp;
	char *TAG = "uartDataHandle";
	int ID_NUM = 0;
	temp = data;
	if (temp != NULL)
	{
    
		temp = (uint8_t *)strstr((const char *)temp, "ID:"); // distinguish “ID:” character string 
		if (temp != NULL)
		{
    
			temp = (uint8_t *)strstr((const char *)temp, ":");// Get string ID The following string number 
			++temp; // Cross the colon  “ : ”
			ID_NUM = atoi((const char *)temp); // Put the string ID  Convert to integer 
			ESP_LOGI(TAG, "Cmd ID:%d", ID_NUM);
			goto __RETURN_ID;
		}
		else
			goto __RETURN_ID;
	}
	else
		goto __RETURN_ID;

__RETURN_ID:
	return ID_NUM;
}

In this way, you can use different prompt tones ID No. 1 does different actions .

2. control VB-01 Play the tone

        Sending and receiving play prompt sound instructions are different , Can't send ID Orders VB-01 Play the tone . because VB-01 The program does not receive serial port ID No. to play the prompt sound , It is through a group 4 16 bits of data to control the playback , for example ：

unsigned char rcv_uart_buf[RCV_UART_DATA_NUM][RCV_UART_DATA_LEN] =
    {
        {0xAA, 0x02, 0x00, 0xBB}, // Play the tone  BEEP_00
        {0xAA, 0x02, 0x01, 0xBB}, // Play the tone  BEEP_01
        {0xAA, 0x02, 0x02, 0xBB}, // Play the tone  BEEP_02
        {0xAA, 0x02, 0x03, 0xBB}, // And so on 
        {0xAA, 0x02, 0x04, 0xBB},
        {0xAA, 0x02, 0x05, 0xBB},
        {0xAA, 0x02, 0x06, 0xBB},
        {0xAA, 0x02, 0x07, 0xBB},
        {0xAA, 0x02, 0x08, 0xBB},
        {0xAA, 0x02, 0x09, 0xBB},
        {0xAA, 0x02, 0x0A, 0xBB},

So the outside MCU Want to control VB-01 When playing the prompt tone , Direct transmission 4 The corresponding 16 bit data is enough ,VB-01 The default control data is the same as the above . Here is ESP-C3-12F control VB-01 Play the relevant code of the prompt tone ：

/* control array */
unsigned char beep[][4] = {
    
	{
    0xAA, 0x02, 0x03, 0xBB}, // turn on the light 
	{
    0xAA, 0x02, 0x04, 0xBB}, // Turn off the lights 
	{
    0xAA, 0x02, 0x05, 0xBB}, // Turn it green 
	{
    0xAA, 0x02, 0x06, 0xBB}, // Turn it red 
	{
    0xAA, 0x02, 0x07, 0xBB}, // Turn it blue 
	{
    0xAA, 0x02, 0x08, 0xBB}, // Make it purple 
	{
    0xAA, 0x02, 0x09, 0xBB}, // Make it orange 

	{
    0xAA, 0x02, 0x0A, 0xBB}, // Start running 
	{
    0xAA, 0x02, 0x0B, 0xBB}, // Stop running 
	{
    0xAA, 0x02, 0x0C, 0xBB}, // To speed up 
	{
    0xAA, 0x02, 0x0D, 0xBB}, // Deceleration 
	{
    0xAA, 0x02, 0x0E, 0xBB}, // Still running 
};

// Control code snippet 
	switch (RGB_24Bit)
	{
    
	case 0XFF00:
		uart_write_bytes(UART_NUM_1, beep[2], sizeof(beep[0]));
		break;
	case 0xFF0000:
		uart_write_bytes(UART_NUM_1, beep[3], sizeof(beep[0]));
		break;
	case 0xFF:
		uart_write_bytes(UART_NUM_1, beep[4], sizeof(beep[0]));
		break;
	case 0XF05308:
		uart_write_bytes(UART_NUM_1, beep[6], sizeof(beep[0]));
		break;
	case 0X8C0BEE:
		uart_write_bytes(UART_NUM_1, beep[5], sizeof(beep[0]));
		break;
	case 0xFFFFFF:
		uart_write_bytes(UART_NUM_1, beep[0], 4); // Play ： The light has been turned on 
		break;
	case 0x0:
		uart_write_bytes(UART_NUM_1, beep[1], 4); // Play ： The light has been turned off 
		break;
	default:
		break;
	}

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Four 、 summary

       MCU And VB-01 In fact, the communication of is just normal serial communication , You only need to know some string operations to parse data , And make control action . Trust everyone , More attention is not how to control the playback prompt sound , But how DIY Voice commands , Let's say VB-01 distinguish “ Little love students ”, distinguish “ Tmall elves ” Such as instruction , Or some more coquettish voice instructions . Everyone is looking forward to this knowledge . The demo video will be updated to this blog in two days .
        This article will be synchronized to the official blog of anxinko Technology ：
Welcome to anxinco's official blog ：https://aithinker.blog.csdn.net/

Anxin can purchase connection modules ： Anxin Keke technology Youbao connection , Pay attention to getting first-hand information