homeassistant之MQTT智能灯-基于ESP8266_MQTT_SDK

搭建好了homeassitant和homebridge环境，开始搭建硬件平台，这里使用esp8266模块和官方的mqtt的SDK

首先，需要在homeassistant的配置文件中添加：

light:
platform: mqtt
name: 'Light'
state_topic: '/mqtt/topic/0'
command_topic: '/mqtt/topic/1'
brightness_state_topic: '/mqtt/topic/2'
brightness_command_topic: '/mqtt/topic/3'
brightness_scale: 100

重启hass便可以看到概览界面多了一个灯，

硬件程序设计：

1、配置mqtt_config.h中相应宏定义，以匹配之前搭建的mqtt环境

2、添加light的状态结构体以及PWM用到的IO引脚的宏

#define PWM_CHANNEL 1 // 5:5channel ; 3:3channel

/*Definition of GPIO PIN params, for GPIO initialization*/
#define PWM_0_OUT_IO_MUX PERIPHS_IO_MUX_MTDI_U
#define PWM_0_OUT_IO_NUM 12
#define PWM_0_OUT_IO_FUNC FUNC_GPIO12

struct light_param {
uint32 pwm_period;
uint32 pwm_duty[PWM_CHANNEL];
};

struct light_state {
uint32 state;
};

在用户代码文件中：

#define LIGHT_SWITCH_ON "ON"
#define LIGHT_SWITCH_OFF "OFF"

#define LIGHT_SWITCH_STATE       "/mqtt/topic/0"
#define LIGHT_SWITCH_CONTROL     "/mqtt/topic/1"
#define LIGHT_BRIGHTNESS_STATE   "/mqtt/topic/2"
#define LIGHT_BRIGHTNESS_CONTROL "/mqtt/topic/3"

#define LIGHT_GPIO_1     5
#define LIGHT_GPIO_ON     1
#define LIGHT_GPIO_OFF     0

#define LIGHT_PWM_CYCLE       1000
#define LIGHT_PWM_DUTY_MAX   (LIGHT_PWM_CYCLE*1000/45)
#define LIGHT_PWM_DUTY_UNIT         (LIGHT_PWM_DUTY_MAX/100)
#define LIGHT_PWM_DUTY(n)           ((n*45)/(LIGHT_PWM_CYCLE * 1000))

uint32 io_info[][3] =
{{PWM_4_OUT_IO_MUX,PWM_4_OUT_IO_FUNC,PWM_4_OUT_IO_NUM},

struct light_param light_p;
struct light_state light_s;

主要用户代码：

if(0 != os_strstr(topicBuf, LIGHT_SWITCH_CONTROL))
    {
    if(0 != os_strstr(dataBuf, LIGHT_SWITCH_OFF))
    {
      MQTT_Publish(client, LIGHT_SWITCH_STATE, LIGHT_SWITCH_OFF, 3, 0, 0);
      hw_timer_cmd(0);
      GPIO_OUTPUT_SET(LIGHT_GPIO_1, LIGHT_GPIO_OFF);
    }
    else
    {
      MQTT_Publish(client, LIGHT_SWITCH_STATE, LIGHT_SWITCH_ON, 2, 0, 0);
      hw_timer_cmd(1);
      pwm_set_duty(light_p.pwm_duty[0], 0);
      pwm_start();
    }

}

    if(0 != os_strstr(topicBuf, LIGHT_BRIGHTNESS_CONTROL))
    {
    if(data_len == 3)
    {
      brightness = ((dataBuf[0] - 0x30)*100);
      brightness += ((dataBuf[1] - 0x30) * 10);
      brightness += (dataBuf[2] - 0x30);
    }
    else if(data_len == 2)
    {
      brightness = ((dataBuf[0] - 0x30)*10);
      brightness += (dataBuf[1] - 0x30) ;
    }
    else
    {
      brightness += (dataBuf[0] - 0x30) ;
    }
    MQTT_Publish(client, LIGHT_BRIGHTNESS_STATE, dataBuf, strlen(dataBuf), 0, 0);
        if(brightness == 0)
        {
        MQTT_Publish(client, LIGHT_SWITCH_STATE, LIGHT_SWITCH_OFF, 3, 0, 0);
        light_p.pwm_duty[0] = 0;
        }
        else{
        MQTT_Publish(client, LIGHT_SWITCH_STATE, LIGHT_SWITCH_ON, 2, 0, 0);
        light_p.pwm_duty[0] = brightness*LIGHT_PWM_DUTY_UNIT;
        }
    pwm_set_duty(light_p.pwm_duty[0], 0);
    pwm_start();
    }

homeassistant之MQTT智能灯-基于ESP8266_MQTT_SDK

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