ESP8266 AP_ UDP_ Client

Catalog

Preface

In the timing callback function , Inquire about AP In mode ESP8266 Of IP Address , Successful acquisition IP Address , Then turn off the timer , Initialize the network connection (UDP signal communication )

Here you need to set the target IP/ port (ESP8266 As Client, You need to know in advance Server Of IP/ port )

 

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Preface

We will 8266 stay ap Mode plus creation udp signal communication , also 8266 Logically, as a client , The network debugging assistant acts as a server

void ICACHE_FLASH_ATTR user_init(void)
{
	uart_init(115200,115200);	//  Initialize the serial port baud rate 
	os_delay_us(10000);			//  Wait for the serial port to stabilize 
	os_printf("\r\n=================================================\r\n");
	os_printf("\t Project:\t%s\r\n", ProjectName);
	os_printf("\t SDK version:\t%s", system_get_sdk_version());
	os_printf("\r\n=================================================\r\n");

	// OLED Display initialization 
	//--------------------------------------------------------
	OLED_Init();							// OLED initialization 
	OLED_ShowString(0,0,"ESP8266 = AP");	// ESP8266 Pattern 
	OLED_ShowString(0,2,"IP:");				// ESP8266_IP Address 
	OLED_ShowString(0,4,"Remote  = STA");	//  Remote host mode 
	OLED_ShowString(0,6,"IP:");				//  Remote host IP Address 
	//--------------------------------------------------------


	LED_Init_JX();		// LED initialization 


	ESP8266_AP_Init_JX();			//  initialization ESP8266_AP Pattern 

	OS_Timer_1_Init_JX(30000,0);	// 30 Second timing ( once )
}

    OS_Timer_1_Init_JX(30000,0);    // 30 Second timing ( once )

timing 30s Is to create for the network debugging assistant udp signal communication , And reserve time for setting up the server

In the timing callback function , Inquire about AP In mode ESP8266 Of IP Address , Successful acquisition IP Address , Then turn off the timer , Initialize the network connection (UDP signal communication )

void ICACHE_FLASH_ATTR OS_Timer_1_cb(void)
{
	struct ip_info ST_ESP8266_IP;	// IP Information structure 

	u8  ESP8266_IP[4];		//  Save in dotted decimal form IP


	wifi_get_ip_info(SOFTAP_IF,&ST_ESP8266_IP);	//  Inquire about AP In mode ESP8266 Of IP Address 

	if(ST_ESP8266_IP.ip.addr != 0)				// ESP8266 Successful acquisition IP Address 
	{
		ESP8266_IP[0] = ST_ESP8266_IP.ip.addr;		//  dotted decimal IP The first number of  <==> addr Lower eight 
		ESP8266_IP[1] = ST_ESP8266_IP.ip.addr>>8;	//  dotted decimal IP The second number of  <==> addr Lower eight 
		ESP8266_IP[2] = ST_ESP8266_IP.ip.addr>>16;	//  dotted decimal IP The third number of  <==> addr Second highest eight 
		ESP8266_IP[3] = ST_ESP8266_IP.ip.addr>>24;	//  dotted decimal IP The fourth number of  <==> addr Top eight digit 

		//  Show ESP8266 Of IP Address 
		//-----------------------------------------------------------------------------------------------
		os_printf("ESP8266_IP = %d.%d.%d.%d\n",ESP8266_IP[0],ESP8266_IP[1],ESP8266_IP[2],ESP8266_IP[3]);
		OLED_ShowIP(24,2,ESP8266_IP);	// OLED Show ESP8266 Of IP Address 
		//-----------------------------------------------------------------------------------------------


		os_timer_disarm(&OS_Timer_1);	//  off timer 

		ESP8266_NetCon_Init_JX();		//  Initialize the network connection (UDP signal communication )
	}
}

Here you need to set the target IP/ port (ESP8266 As Client, You need to know in advance Server Of IP/ port )

//  Initialize the network connection (UDP signal communication )
//=============================================================================================================
void ICACHE_FLASH_ATTR ESP8266_NetCon_Init_JX()
{
	//  Structure assignment 
	//--------------------------------------------------------------------------
	ST_NetCon.type = ESPCONN_UDP;				//  Set the communication protocol to UDP

	ST_NetCon.proto.udp = (esp_udp *)os_zalloc(sizeof(esp_udp));	//  Open up memory 


	//  Here you need to set the target IP/ port (ESP8266 As Client, You need to know in advance Server Of IP/ port )
	//--------------------------------------------------------------------------
	ST_NetCon.proto.udp->local_port  = 8266 ;	//  Set local port 
	ST_NetCon.proto.udp->remote_port = 8888;	//  Set the target port 
	ST_NetCon.proto.udp->remote_ip[0] = 192;	//  Set the target IP Address 
	ST_NetCon.proto.udp->remote_ip[1] = 168;
	ST_NetCon.proto.udp->remote_ip[2] = 4;
	ST_NetCon.proto.udp->remote_ip[3] = 2;
	//u8 remote_ip[4] = {192,168,4,2};		//  The goal is IP Address 
	//os_memcpy(ST_NetCon.proto.udp->remote_ip,remote_ip,4);	//  Copy memory 


	espconn_regist_sentcb(&ST_NetCon,ESP8266_WIFI_Send_Cb_JX);	//  Register the callback function for sending network data successfully 
	espconn_regist_recvcb(&ST_NetCon,ESP8266_WIFI_Recv_Cb_JX);	//  Register the callback function for successful network data reception 

	espconn_create(&ST_NetCon);	//  initialization UDP signal communication 


	espconn_send(&ST_NetCon,"Hello,I am ESP8266",os_strlen("Hello,I am ESP8266"));	//  Active direction Server Initiate communication 
}

That is to say, when we 8266 As a client , Need to pre assign the server ip Address and port number , To actively send communication to the server