ESP8266 UDP通信

向右看齐 2022-06-12 07:45 190阅读 0赞

#include "driver/uart.h"
    #include "espconn.h"
    
    void ICACHE_FLASH_ATTR
    user_rf_pre_init(void){ }
    
    struct espconn user_udp_espconn;
    
    ETSTimer connect_timer;
    ETSTimer test_timer;
    
    //udp发送函数
    void ICACHE_FLASH_ATTR user_udp_send(void *data)
    { 
        char yladdr[6] = { 0};
        char DeviceBuffer[40] = { 0};//将获取的MAC地址格式化输出到一个buffer里面
    	
    	os_printf("正在发送...\r\n");
        
        wifi_get_macaddr(STATION_IF, yladdr);//查询MAC地址
        os_sprintf(DeviceBuffer,"设备地址为："MACSTR"\r\n", MAC2STR(yladdr));//格式化MAC地址
        espconn_sent(&user_udp_espconn, DeviceBuffer, os_strlen(DeviceBuffer));
    }
    
    //udp发送回调
    void ICACHE_FLASH_ATTR user_udp_sent_cb(void *arg)
    { 
    	os_timer_disarm(&test_timer);
    	os_timer_setfn(&test_timer, user_udp_send, NULL);
    	os_timer_arm(&test_timer, 1000, 0);//1秒钟发送一次
    }
    
    //udp接收回调
    void ICACHE_FLASH_ATTR user_udp_recv_cb(void *arg,
            char *pdata,
            unsigned short len)
    { 
    	os_printf("UDP已经接收数据：%s", pdata);
    }
    
    //创建UDP连接
    void ICACHE_FLASH_ATTR wifi_conned(void *arg)
    { 
    	uint8 status = 0;
    	static uint8 count = 0;
    
    	count++;
    	os_timer_disarm(&connect_timer);
    	
    	status = wifi_station_get_connect_status();
    	if(status == STATION_GOT_IP)
    	{ 
    		wifi_set_broadcast_if(STATIONAP_MODE); //设置UDP广播的发送接口
    		user_udp_espconn.type = ESPCONN_UDP;
    		user_udp_espconn.proto.udp = (esp_udp*)os_zalloc(sizeof(esp_udp));
    		user_udp_espconn.proto.udp->local_port = 2525;
    		user_udp_espconn.proto.udp->remote_port = 1112;
    
    		const char udp_remote_ip[] = { 255,255,255,255}; //用于存放远程IP地址
    		os_memcpy(&user_udp_espconn.proto.udp->remote_ip, udp_remote_ip, sizeof(udp_remote_ip));
    
    		espconn_regist_recvcb(&user_udp_espconn, user_udp_recv_cb); //接收回调函数
    		espconn_regist_sentcb(&user_udp_espconn, user_udp_sent_cb); //发送回调函数
    		espconn_create(&user_udp_espconn); //创建UDP连接
    		user_udp_send(NULL);
    
    		return;
    	}
    	else
    	{ 
    		if(count >= 7)
    		{ 
    			os_printf("wifi连接失败！");
            	return;
            }
    	}
    	
    	os_timer_arm(&connect_timer, 2000, 0);
    }
    
    //加入当前可用wiff
    void ICACHE_FLASH_ATTR scan_done(void *arg, STATUS status)
    { 
    	char ssid[] = "Feixun_1003";
    	char password[] = "12345678";
    	struct station_config stationConf = { 0};
    	
    	if (status == OK)
    	{ 
    		os_memcpy(&stationConf.ssid, ssid, os_strlen(ssid)); //加入当前可用wiff
    		os_memcpy(&stationConf.password, password, os_strlen(password));	//密码
    		wifi_station_set_config_current(&stationConf);
    		wifi_station_connect();
    		os_timer_setfn(&connect_timer, wifi_conned, NULL);
    		os_timer_arm(&connect_timer, 2000, 0);
    	}
    }
    
    void to_scan(void)
    { 
    	wifi_station_scan(NULL, scan_done);
    
    	return;
    }
    
    //配置ESP8266
    void user_init()
    { 
    	struct softap_config config = { 0};
    	char ssid[] = "ESP8266";
    	char password[] = "12345678";
    
    	uart_init(BIT_RATE_115200, BIT_RATE_115200);
    	os_delay_us(60000);
    
    	wifi_set_opmode(STATIONAP_MODE);
    
    	wifi_softap_get_config(&config);
    
    	config.ssid_len = os_strlen(ssid);
    	os_memset(config.ssid, 0, sizeof(config.ssid));
    	os_memcpy(config.ssid, ssid, config.ssid_len);
    	os_memset(config.password, 0, sizeof(config.password));
    	os_memcpy(config.password, password, os_strlen(password));
    
    	wifi_softap_set_config(&config);
    
    	system_init_done_cb(to_scan);
    
    	return;
    }

![com][]  
![udp][]

[com]: /images/20220612/d88d5ca654644cb395da791495769f2d.png
[udp]: /images/20220612/f48acb25d5154804819013ee471fbbd0.png