本文主要是介绍ESP32使用按键配网并通过LED指示网络状态,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
前言
上面我们已经可以通过 ESPTOUCH 和 Airkiss 给模块配网,并且存储在 nvs 中,重启后仍然可以联网,只是这样仍然不能满足我们实际的应用,这次我们增加按键作为输入,LED作为输出,实现长按按键配网,并可以通过LED指示网络状态。
添加自己的组件
为了让程序结构更加清晰,所以我们在smart_config例程的基础上做了修改,在main文件夹里新建了main.c 、smartconfig_button.c , smartconfig_led.c ,将原来的smartconfig_main.c改为smartconfig_wifi.c,及其对应的.h文件
增加文件后,然后将 CMakeList.txt 文件修改为:
idf_component_register(SRCS “iot_button.c” “smartconfig_wifi.c” “smartconfig_button.c” “smartconfig_led.c” “main.c”
INCLUDE_DIRS “.”)
增加按键清除配网信息的功能
这里我们使用了乐鑫官方有个仓库叫做esp-iot-solution,里面有很多常用外设的驱动和物联网场景的实现代码。其中就有一个button模块来实现按键的长按、短按检测,我们将 botton 模块里的 iot_button.c 和 iot_button.h 文件添加到main文件夹中。
然后实现通过 smartconfig_button.c 文件实现长按清除网络信息的功能,具体如下:
//--------------- smartconfig_button.c ---------------//
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "driver/gpio.h"
#include "iot_button.h"
#include "smartconfig_button.h"
#include "smartconfig_wifi.h"#define BUTTON_IO_NUM 0 //GPIO0
#define BUTTON_ACTIVE_LEVEL 0 //信号有效电平:低电平static const char* TAG_BTN = "SMARTCONFIG_BUTTON";void button_tap_cb(void* arg)
{char* pstr = (char*) arg;pstr = pstr;ESP_LOGI(TAG_BTN, "key tap \n");
}void button_press_3s_cb(void* arg)
{char* pstr = (char*) arg;pstr = pstr;ESP_LOGI(TAG_BTN,"key 3s long press\n"); //按键长按,清除配网信息并重启 nvs_handle_t wificonfig_set_handle;ESP_ERROR_CHECK( nvs_open("wificonfig",NVS_READWRITE,&wificonfig_set_handle) );ESP_ERROR_CHECK( nvs_set_u8(wificonfig_set_handle,"WifiConfigFlag", wifi_unconfiged) );ESP_ERROR_CHECK( nvs_commit(wificonfig_set_handle) );nvs_close(wificonfig_set_handle);ESP_LOGI(TAG_BTN,"Set Restart now.\n");esp_restart();
}void smartconfig_button_init(void)
{//配置配网按键button_handle_t btn_handle = iot_button_create(BUTTON_IO_NUM, BUTTON_ACTIVE_LEVEL);//注册单击事件iot_button_set_evt_cb(btn_handle, BUTTON_CB_TAP, button_tap_cb, "TAP");//注册 3s 长按事件iot_button_add_custom_cb(btn_handle, 3, button_press_3s_cb, NULL);}
加入配网指示灯
灯的不同状态代表不同的配网状态,设定:慢闪代表未联网,快闪代表正在联网,长亮代表网络已连接。这里会用到ESP32的系统定时器,使用方法也比较简单,创建定时器,开启或者关闭定时器,源码如下:
//--------------- smartconfig_led.c ---------------//
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "driver/gpio.h"
#include "esp_timer.h"
#include "esp_log.h"
#include "smartconfig_led.h"#define WIFI_STATUS_LED_GPIO 15static const char* TAG = "WIFI_STATUS_LED";
static esp_timer_handle_t smartconfig_led_soft_timer;//定时器回调里实现灯的闪烁
static void periodled_timer_callback(void* arg)
{static uint8_t s_LEDToggle = 0;s_LEDToggle = ~s_LEDToggle;if(s_LEDToggle){gpio_set_level(WIFI_STATUS_LED_GPIO, 1);} else{gpio_set_level(WIFI_STATUS_LED_GPIO, 0);}
}static void handle_smartconfig_led_status(Wifi_Status_t WifiState)
{static uint8_t s_WifiDisconnectNotice;switch(WifiState){case WIFI_DISCONNECT:if(s_WifiDisconnectNotice == 0){ESP_ERROR_CHECK(esp_timer_start_periodic(smartconfig_led_soft_timer, ConnectStatusInterval));s_WifiDisconnectNotice = 1;} break;case WIFI_CONNECTING://正在联网的时候LED快闪if(s_WifiDisconnectNotice == 1){ESP_ERROR_CHECK(esp_timer_stop(smartconfig_led_soft_timer));}ESP_ERROR_CHECK(esp_timer_start_periodic(smartconfig_led_soft_timer, DisconnectStatusInterval));break;case WIFI_CONNECTED://连上网后LED常亮,并注销软件定时器,减少消耗gpio_set_level(WIFI_STATUS_LED_GPIO, 1);if(s_WifiDisconnectNotice == 1){ ESP_ERROR_CHECK(esp_timer_stop(smartconfig_led_soft_timer));ESP_ERROR_CHECK(esp_timer_delete(smartconfig_led_soft_timer));s_WifiDisconnectNotice = 0;} break;default:break;}
}//LED管脚初始化
void wifi_status_led_init(void)
{gpio_config_t smartconfig_IO_conf;smartconfig_IO_conf.intr_type = GPIO_PIN_INTR_DISABLE;smartconfig_IO_conf.mode = GPIO_MODE_OUTPUT;smartconfig_IO_conf.pin_bit_mask = 1 << WIFI_STATUS_LED_GPIO;smartconfig_IO_conf.pull_down_en = 0;smartconfig_IO_conf.pull_up_en = 0;gpio_config(&smartconfig_IO_conf); gpio_set_level(WIFI_STATUS_LED_GPIO, 0); esp_timer_create_args_t periodled_timer_args = {.callback = &periodled_timer_callback,/* name is optional, but may help identify the timer when debugging */.name = "periodled"}; ESP_ERROR_CHECK(esp_timer_create(&periodled_timer_args, &smartconfig_led_soft_timer));
}//通知网络未连接
void delegate_wifi_disconnect_status(void)
{ESP_LOGI(TAG,"Delegate wifi is disconnect\n"); handle_smartconfig_led_status(WIFI_DISCONNECT); }
//通知网络已连接
void delegate_wifi_connected_status(void)
{ESP_LOGI(TAG,"Delegate wifi has connected\n");handle_smartconfig_led_status(WIFI_CONNECTED);}
//通知网络正在连接中
void delegate_wifi_connecting_status(void)
{ ESP_LOGI(TAG,"Delegate wifi is connecting\n"); handle_smartconfig_led_status(WIFI_CONNECTING);
}//--------------- smartconfig_led.h ---------------//
#ifndef __SMARTCONFIG_LED_H__
#define __SMARTCONFIG_LED_H__#ifdef __cplusplus
extern "C" {
#endif#define ConnectStatusInterval 1000000 //单位为us
#define DisconnectStatusInterval 200000typedef enum{WIFI_DISCONNECT = 1,WIFI_CONNECTING,WIFI_CONNECTED,
}Wifi_Status_t;void wifi_status_led_init(void);
void delegate_wifi_disconnect_status(void);
void delegate_wifi_connected_status(void);
void delegate_wifi_connecting_status(void);#ifdef __cplusplus
}
#endif#endif
主函数
删除 smartconfig_wifi.c 中的 app_main() 函数,在 main.c 中增加如下源码:
#include <string.h>
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "smartconfig_button.h"
#include "smartconfig_wifi.h"
#include "smartconfig_led.h"void app_main(void)
{ESP_ERROR_CHECK( nvs_flash_init() );wifi_status_led_init();smartconfig_button_init();//initialise_wifi();check_wifi_config_in_nvs();
}
实验结果
编译下载程序后,长按 Boot 按键 3S后,就自动清除配网标志位,并自动重启后,重启后就等待配网,同时LED闪烁,等网络连接后,LED指示灯常亮。
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