ASR Unit

Unit ASR is an AI offline speech recognition unit, featuring the built-in AI smart offline speech module CI-03T. This unit offers powerful functions such as speech recognition, voiceprint recognition, speech enhancement, and speech detection. It supports AEC (Acoustic Echo Cancellation) to effectively eliminate echoes and noise interference, improving the accuracy of speech recognition. Additionally, it supports mid-speech interruption, allowing for flexible interruption during the recognition process and quick response to new commands. The product is pre-configured with wake-up words and feedback commands at the factory. The device uses UART serial communication for data transmission and also supports waking up the device via UART or voice keywords. This unit supports user customization of the wake-up recognition word and can recognize up to 300 command words. It is equipped with a microphone for clear audio capture and includes a speaker for high-quality audio feedback. This product is widely used in AI assistants, smart homes, security monitoring, automotive systems, robotics, smart hardware, healthcare, and other fields, making it an ideal choice for realizing smart voice interactions.

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Micropython Example:

# SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
#
# SPDX-License-Identifier: MIT

import os, sys, io
import M5
from M5 import *
from unit import ASRUnit


title0 = None
label0 = None
label1 = None
label2 = None
label3 = None
asr_0 = None


def asr_0_hello_event(args):
    global title0, label0, label1, label2, label3, asr_0
    print("Rec Hello")


def setup():
    global title0, label0, label1, label2, label3, asr_0

    M5.begin()
    Widgets.fillScreen(0x222222)
    title0 = Widgets.Title(
        "UnitASR M5CoreSe Example", 3, 0xFFFFFF, 0x0000FF, Widgets.FONTS.DejaVu18
    )
    label0 = Widgets.Label("msg:", 0, 51, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18)
    label1 = Widgets.Label("rec cmd num:", 0, 93, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18)
    label2 = Widgets.Label(
        "rec cmd word:", 0, 134, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18
    )
    label3 = Widgets.Label(
        "rec cmd handler state:", 0, 178, 1.0, 0xFFFFFF, 0x222222, Widgets.FONTS.DejaVu18
    )

    asr_0 = ASRUnit(2, port=(1, 2))
    print(asr_0.search_command_num("hello"))
    print(asr_0.search_command_word(0x32))
    asr_0.add_command_word(0x32, "hello", asr_0_hello_event)


def loop():
    global title0, label0, label1, label2, label3, asr_0
    M5.update()
    if asr_0.get_received_status():
        label0.setText(str((str("msg:") + str((asr_0.get_current_raw_message())))))
        label1.setText(str((str("rec cmd num:") + str((asr_0.get_current_command_num())))))
        label2.setText(str((str("rec cmd word:") + str((asr_0.get_current_command_word())))))
        label3.setText(str((str("rec cmd handler state:") + str((asr_0.get_command_handler())))))


if __name__ == "__main__":
    try:
        setup()
        while True:
            loop()
    except (Exception, KeyboardInterrupt) as e:
        try:
            from utility import print_error_msg

            print_error_msg(e)
        except ImportError:
            print("please update to latest firmware")

UIFLOW2 Example:

asr_cores3_example.m5f2

class ASRUnit

Constructors

class ASRUnit(id, port)

Initialize the ASRUnit object with UART configuration and set up the command handler.

参数:

id (int) – The UART port ID for communication, default is 1.
port – A list or tuple containing the TX and RX pins for UART communication.

UIFLOW2:

Methods

ASRUnit.get_received_status()

Get the status of the received message.

returns:

True if a message is received, False otherwise.

UIFLOW2:

ASRUnit.send_message(command_num)

Send a message with a specified command number via UART.

参数:: command_num (int) – The command number to send in the message.

UIFLOW2:

ASRUnit.get_current_raw_message()

Get the raw message received in hexadecimal format.

返回:: The raw message as a string in hexadecimal format.

UIFLOW2:

ASRUnit.get_current_command_word()

Get the command word corresponding to the current command number.

返回:: The command word as a string.

UIFLOW2:

ASRUnit.get_current_command_num()

Get the current command number.

返回:: The command number.

UIFLOW2:

ASRUnit.get_command_handler()

Check if the current command has an associated handler.

返回:: True if a handler exists for the current command,

UIFLOW2:

ASRUnit.add_command_word(command_num, command_word, event_handler)

Add a new command word and its handler to the command list.

参数:

command_num (int) – The command number (must be between 0 and 255).
command_word (str) – The command word to associate with the command number.
event_handler – An optional event handler function to be called for the command.

UIFLOW2: