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Apache-2.0

智能遥控器(在线版)

本项目基于esp32a1s模组,设计了一个遥控器,除了实现基本的红外遥控功能,还利用ESP32芯片具备的AI能力,WIFI及蓝牙功能,实现多种方式的输入输出控制,使人们能通过语音,手机远程进行红外遥控。同时又加入温度传感器,并支持将温度数据上传云端,使人们能随时随地查看、分析数据。

仓库目录

doc:说明文档

main:用户代码

audio:音频代码

app:应用代码

ir_decoder:红外码库代码

network:网络、蓝牙相关代码

periph:外设驱动代码

picture:图片

tools:使用到的工具

mp3:MP3离线音频

spiffs:文件系统,存放二进制码库 etymology_anallyze:百度词法分析定制文件

partitions.csv:分区表

一、程序框架

cc34e0b2ccef417fb412c0f3445c81e7

二、硬件设计

三、软件模块

1、语音识别模块

相对于离线版,在线版除了具有本地的语音识别之外,还加入了百度的语音识别API,当本地的语音识别未能匹配到命令时,将音频数据发送到百度语音识别接口,并对返回的文本结果进行解析,逻辑如图(百度智能云语音识别返回结果是utf-8编码的字符串,所以代码编辑器中最好设置utf-8编码.)

image-20210903144247457

  • WakeNet是语音唤醒模型
  • MultiNet是语音识别模型。
  • Baidu ASR是在线识别的任务

语音模块的工作流程如下:

麦克风输入的音频经过音频解码芯片,通过IIS进入到ESP32内存,经过降噪处理输入WakeNet检测是否存在唤醒词,若有唤醒词则进入语音识别,将音频输入MultiNet匹配命令词,同时缓存音频数据。若匹配成功则会执行命令内容,若经过设置的时间(eg 4s)匹配失败,则将缓存的音频数据通过Baidu ASR发送到百度智能云并读取返回的文本结果,对结果解析出命令内容执行。

2、ble

ESP32支持蓝牙双模,目前仅使用蓝牙进行配网(即给esp32发送wifi名称和密码,使esp32连接到wifi)。所以使用ble更合适。

BLE(低功耗蓝牙),适合数据量较小的场合,ESP32支持完整的BLE协议栈,以ESP32作为BLE从机,发送广播、建立GATT Server并等待客户端连接。客户端以微信小程序BLE为例。小程序与ESP32蓝牙通信过程如下图:

ESP32建立一张profile、并创建一个wifi service、用于配置ESP32的wifi。小程序可向wii service 的相应属性中写入数据,来配置ESP32的wifi。

如图,向SSID、PSWD、CONFIG分别写入下值,ESP32会自动连接到路由器esp

image-20210903150941609

3、mqtt模块

该模块使用mqtt_client库实现mqtt客户端进程的登陆,订阅,发布等功能。MQTT broker则使用华为云的设备接入IOT平台。

华为云平台为每个设备定义了多个主题,用于最基本的mqtt消息应用,本模块参考了设备接入Iota->API参考->设备侧mqtt接口参考实现了以下功能:

目前实现的软件框架如图所示:

ec02f9b0affc47ae88edbe62e6b827a5

4、音频播放模块

本项目板子上装备了两个喇叭,可以用于播放音频,可播放 本地音频 和 网络音频流 。如图所示,由于嵌入式设备内存有限,故本地音频主要是一些简单的提示语音,其优点是播放速度快,响应及时;而HTTP音频流能灵活播放音频,但其受限于网络环境,故将二者结合互补。

dadd9504768e4ec4b2890331e80c3bab

5、红外模块

目前的家具,电器中,仍有很多电器使用红外遥控,特别是空调。同类型的设备使用的红外协议大同小异,并且都可以查看其协议内容。

红外模块可发送不同类型,品牌的产品的红外控制信号,同时具备学习功能,能通过遥控器,学习设备的红外协议。

6、传感器模块

目前我们的板子上添加了ds18b20温度传感器,用于准确的读取室内的温度。

7、定时器模块

定时模块主要用于记录当前的年份,月份,日期,时间,提供精确到秒的定时提醒服务,支持大时间尺度上的定时,如一天,两天甚至更长时间的定时提醒。其定时的时钟源是freertos的系统时钟。

8、无线检测模块

四、使用

1、编译

先安卓ESP-ADF,使用idf-v4.0.2,将仓库下载到examples目录下,首先设置环境变量,在idf目录下执行:

./export.sh
export ADF_PATH=/esp/esp-adf

在项目目录下执行:

idf.py build

等待编译完成

2、烧录

根据partitions.cv的地址安排,烧录二进制文件。

3、上电初始化

上电后会自动连接上次连接的路由器 若无法连接,则会一直请求连接

4、蓝牙配网

打开微信,搜索小程序BLETool,打开蓝牙,连接到ESP32A1S,然后在characteristics分别写入:

  • 6601 :写入你的路由名称
  • 6602:路由密码
  • 6603:发送666确认连接

完成以上操作后。设备会自动连接到路由器,复位后会尝试连接上次连接的路由器。配网完成后可关闭BLE以节省内存资源。

开发者也可通过串口发送如下串口数据实现配网:

#yourssid
@yourpassword
$

5、语音唤醒及识别

嗨乐鑫,唤醒,蓝灯亮起,说出命令词

命令词及控制代码在 'static esp_err_t asr_multinet_control(int commit_id)'

6、红外遥控/学习

开启ir_study();后,使用本地红外遥控器发送指定命令(如,空调遥控器发送打开 制冷模式 26° 自动扫风 一级风速,目前仅支持格力美的海尔)即可匹配本地码库。

目前支持空调红外遥控,如设置开关,温度,扫风,风速,工作模式。

7、日历系统

主要在clock.c中,以一个任务的形式存在。日历系统在初始化阶段会获取网络gmt时间,并设置一个定时器,每隔24小时获取gmt时间。

日历系统支持定时器功能,定时时间精度为1s,定时最大时长可1年(不建议)

8、http请求

该部分代码位于myhttp.c中,主要负责网络时间,天气数据,百度token的获取。

9、MQTT客户端

使用华为云iot接入

参考文档 https://support.huaweicloud.com/api-iothub/iot_06_v5_3010.html

主题列表

下发设备命令: $oc/devices/60b9c9383744a602a5cb9bf3_smart_control_01/sys/commands/request_id={request_id}

设备响应: $oc/devices/60b9c9383744a602a5cb9bf3_smart_control_01/sys/commands/response/request_id={request_id}

查询设备属性: $oc/devices/{device_id}/sys/properties/get/request_id={request_id}

设备响应 $oc/devices/{device_id}/sys/properties/get/response/request_id={request_id}

命令控制

可汇报数据:室内温度,空调状态,温度,定时任务?

  • temp:(int)36
  • ir_status:(int)open,temperature,windspeed,
  • timer: (string)timer_name,(string)time

可控制的动作:空调的控制,读取温度,设置定时任务,红外学习

  • ir_status:(int)open,temperature,windspeed,
  • timer: (string)timer_name,(string)time
  • ir_study:(int) open

10、传感器

目前搭载了ds18b20温度传感器,在每次上电时先读一次温度。

11、无线检测

12、命令词

本地识别

CONFIG_CN_SPEECH_COMMAND_ID0="da kai kong tiao"

CONFIG_CN_SPEECH_COMMAND_ID1="guan bi kong tiao"

CONFIG_CN_SPEECH_COMMAND_ID2="zeng jia feng su"

CONFIG_CN_SPEECH_COMMAND_ID3="jian xiao feng su"

CONFIG_CN_SPEECH_COMMAND_ID4="sheng gao yi du"

CONFIG_CN_SPEECH_COMMAND_ID5="jiang di yi du"

CONFIG_CN_SPEECH_COMMAND_ID6="xian zai ji dian"

CONFIG_CN_SPEECH_COMMAND_ID7="shi nei wen du"

CONFIG_CN_SPEECH_COMMAND_ID8="da kai lan ya"

CONFIG_CN_SPEECH_COMMAND_ID9="guan bi lan ya"

空调

  • 打开/关闭空调 close open aircon
  • 设置空调26度 open aircon 26

蓝牙

  • 打开/关闭蓝牙 close open ble

其他

  • 今天/明天/后天 天气怎么样 day weather
  • 现在几点 now
  • 明天早上12点叫我起床;明天早上12点半叫我起床

词法解析:词典

  • clock:一小时后、两小时后、三小时后;一分钟后、两分钟后、三分钟后

目前的问题

  • wifi检测不准确
  • 需要一个网络管理任务,处理wifi、蓝牙连接状态改变时,对其他任务的影响
  • 词法解析定时任务
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