Wifi模块——ESP8266（三）

通过51单片机、Arduino等实现AT指令配置8266模块，主要是通过串口通信实现的，博主学校的时候用的是51单片机给8266配置，arduino等原理相同，但是通过这种方法配置8266不是很稳定，会出现莫名重启等错误，也有可能是我外围电路没有去设计的原因。

本次主要涉及到的AT指令如下

//ATE0  关闭回显uchar code closeBack[6]={0x41,0x54,0x45,0x30,0x0D,0x0A};//AT+UART=9600,0,0,0  设置UART串口模式uchar code setUART[20]={0x41,0x54,0x2B,0x55,0x41,0x52,0x54,0x3D,0x39,0x36,0x30,0x30,0x2C,0x30,0x2C,0x30,0x2C,0x30,0x0D,0x0A};//AT+CWMODE=1  设置成Station模式uchar code setStationMode[13]={0x41,0x54,0x2B,0x43,0x57,0x4D,0x4F,0x44,0x45,0x3D,0x31,0x0D,0x0A};//AT+CWJAP="ccc","455455455"  连接WIFIuchar code linkWifi[28]={0x41,0x54,0x2B,0x43,0x57,0x4A,0x41,0x50,0x3D,0x22,0x63,0x63,0x63,0x22,0x2C,0x22,0x34,0x35,0x35,0x34,0x35,0x35,0x34,0x35,0x35,0x22,0x0D,0x0A};//AT+CIPMUX=0  设置单路连接模式uchar code setSingleLinkMode[13]={0x41,0x54,0x2B,0x43,0x49,0x50,0x4D,0x55,0x58,0x3D,0x30,0x0D,0x0A};//AT+RST  重启uchar code RST[8]={0x41,0x54,0x2B,0x52,0x53,0x54,0x0D,0x0A};//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器uchar code linkTCPServe[42]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x54,0x41,0x52,0x54,0x3D,0x22,0x54,0x43,0x50,0x22,0x2C,0x22,0x31,0x39,0x32,0x2E,0x31,0x36,0x38,0x2E,0x31,0x39,0x39,0x2E,0x31,0x33,0x34,0x22,0x2C,0x38,0x30,0x38,0x30,0x0D,0x0A};//AT+CIPSEND=  发送数据uchar code sendDate[11]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x45,0x4E,0x44,0x3D};

当然你也可以使用如下方式表示变量

//ATE0  关闭回显uchar code closeBack[]="ATE0\r\n";//AT+UART=9600,0,0,0  设置UART串口模式uchar code setUART[]="AT+UART=9600,0,0,0\r\n";//AT+CWMODE=1  设置成Station模式uchar code setStationMode[]="AT+CWMODE=1\r\n";//AT+CWJAP="ccc","455455455"  连接WIFIuchar code linkWifi[]="AT+CWJAP=\"ccc\",\"455455455\"\r\n";//AT+CIPMUX=0  设置单路连接模式uchar code setSingleLinkMode[]="AT+CIPMUX=0";//AT+RST  重启uchar code RST[]="AT+RST";//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器uchar code linkTCPServe[]="AT+CIPSTART=\"TCP\",\"192.168.199.134\",8080";//AT+CIPSEND=  发送数据uchar code sendDate[]="AT+CIPSEND=";

以上第一种方法要写个循环一个一个发，而第二种比较方便，可以直接使用printf()函数发送。

所用主要是模块作为station连接tcp服务器的一个过程，下面附上我学习时候写的代码，可能有比较多附加的东西，方便我当时调试执行到哪部了。

#include <reg52.h>#include <stdio.h>#define uchar unsigned char#define uint unsigned int/******************本地变量声明******************/uchar Buffer;  //接收串口数据/******************端口引脚定义******************/sbit K1=P3^4;  //正转按键sbit K2=P3^5;  //反转按键sbit K3=P3^6;  //停止按键sbit LED1=P1^0;  //正转灯sbit LED2=P1^1;  //反转灯sbit LED3=P1^2;  //停止灯sbit LED4=P1^3;  //连接服务器成功sbit sig=P2^1;sbit led=P2^0;/******************电机相序表定义******************/uchar code CW[8]={0x01,0x03,0x02,0x06,0x04,0x0c,0x08,0x09};    //电机正时钟旋转相序表uchar code CCW[8]={0x09,0x08,0x0c,0x04,0x06,0x02,0x03,0x01};   //电机逆时钟旋转相序表/**********************ESP8266指令定义***********************//ATE0  关闭回显uchar code closeBack[6]={0x41,0x54,0x45,0x30,0x0D,0x0A};//AT+UART=9600,0,0,0  设置UART串口模式uchar code setUART[20]={0x41,0x54,0x2B,0x55,0x41,0x52,0x54,0x3D,0x39,0x36,0x30,0x30,0x2C,0x30,0x2C,0x30,0x2C,0x30,0x0D,0x0A};//AT+CWMODE=1  设置成Station模式uchar code setStationMode[13]={0x41,0x54,0x2B,0x43,0x57,0x4D,0x4F,0x44,0x45,0x3D,0x31,0x0D,0x0A};//AT+CWJAP="ccc","455455455"  连接WIFIuchar code linkWifi[28]={0x41,0x54,0x2B,0x43,0x57,0x4A,0x41,0x50,0x3D,0x22,0x63,0x63,0x63,0x22,0x2C,0x22,0x34,0x35,0x35,0x34,0x35,0x35,0x34,0x35,0x35,0x22,0x0D,0x0A};//AT+CIPMUX=0  设置单路连接模式uchar code setSingleLinkMode[13]={0x41,0x54,0x2B,0x43,0x49,0x50,0x4D,0x55,0x58,0x3D,0x30,0x0D,0x0A};//AT+RST  重启uchar code RST[8]={0x41,0x54,0x2B,0x52,0x53,0x54,0x0D,0x0A};//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器uchar code linkTCPServe[42]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x54,0x41,0x52,0x54,0x3D,0x22,0x54,0x43,0x50,0x22,0x2C,0x22,0x31,0x39,0x32,0x2E,0x31,0x36,0x38,0x2E,0x31,0x39,0x39,0x2E,0x31,0x33,0x34,0x22,0x2C,0x38,0x30,0x38,0x30,0x0D,0x0A};//AT+CIPSEND=  发送数据uchar code sendDate[11]={0x41,0x54,0x2B,0x43,0x49,0x50,0x53,0x45,0x4E,0x44,0x3D};********************ESP8266指令定义结束*********************//**********************ESP8266 AT指令定义***********************//ATE0  关闭回显uchar code closeBack[]="ATE0\r\n";//AT+UART=9600,0,0,0  设置UART串口模式uchar code setUART[]="AT+UART=9600,0,0,0\r\n";//AT+CWMODE=1  设置成Station模式uchar code setStationMode[]="AT+CWMODE=1\r\n";//AT+CWJAP="ccc","455455455"  连接WIFIuchar code linkWifi[]="AT+CWJAP=\"ccc\",\"455455455\"\r\n";//AT+CIPMUX=0  设置单路连接模式uchar code setSingleLinkMode[]="AT+CIPMUX=0";//AT+RST  重启uchar code RST[]="AT+RST";//AT+CIPSTART="TCP","192.168.199.134",8080  连接TCP服务器uchar code linkTCPServe[]="AT+CIPSTART=\"TCP\",\"192.168.199.134\",8080";//AT+CIPSEND=  发送数据uchar code sendDate[]="AT+CIPSEND=";/********************ESP8266 AT指令定义结束*********************//******************延时函数******************/void delay(uint x)     {uint i,j;for(i=0;i<x;i++)for(j=0;j<110;j++);}/******************延时函数完毕******************//******************电机转动函数*******************/int CW_motor()  //内部齿轮正转一圈{uint i,j,flag=0;  //flag为停止标识  1为停止  初始为0for(i=0;i<8;i++){for(j=0;j<8;j++){if(K3==0||Buffer=='t'){flag=1;break;}P1=CW[j];delay(10);  //延时}if(flag==1)break;}if(flag)return 0;elsereturn 1;}int CCW_motor()  //内部齿轮反转一圈{uint i,j,flag=0;  //flag为停止标识  1为停止  初始为0for(i=0;i<8;i++){for(j=0;j<8;j++){if(K3==0||Buffer=='t'){flag=1;break;}P1=CCW[j];delay(10);  //延时}if(flag==1)break;}if(flag)return 0;elsereturn 1;}/******************电机转动函数完毕******************//******************串口初始化******************/void INIT() { TMOD = 0x20;  //设置定时器1工作在模式2 PCON = 0x00; SCON = 0x50; TL1 = 0xfd; TH1 = 0xfd;  //设置波特率 9600 TR1 = 1;     //启动定时器1 ES = 1;      //开串口中断 EA = 1;      //开总中断 TI=1;        //printf()需TI=1}/******************串口初始化完毕******************//******************8266初始化******************/void send_message(char *x)  //初始化8266 发送AT指令{uint a;uint b,c,d,e;b=c=d=e=1;do{for (a = 0; a<5000; a++);printf("%s",x);do {if (RI) {    //查询是否有数据接收Buffer = SBUF;  //数据暂存于变量中RI = 0;if (Buffer == 'K'){b = 0;d = 0;}c++;if (c == 1000)  //重新发送{c = 1;d = 0;}}} while (d);} while (b);}void INIT_8266()  //初始化8266{delay(2000);send_message("ATE0\r\n");delay(3000);send_message("AT+UART=9600,0,0,0\r\n");delay(3000);send_message("AT+CWMODE=1\r\n");delay(3000);send_message("AT+CWJAP=\"ccc\",\"455455455\"\r\n");delay(3000);send_message("AT+CIPMUX=0\r\n");delay(3000);send_message("AT+RST\r\n");delay(5000);}/******************8266初始化完毕******************//*void Com_Int() interrupt 4{if(RI == 1)   //当硬件接收到一个数据时，RI会置位{RI = 0; Buffer=SBUF;}}*/void main(){uint N=64;  //28BYJ-48 5V DC 4线程步进电机 减速比为1：64//及内部齿轮转64圈，最外部齿轮转1圈uint i;uint flag_motor=0;  //是否转动LED1=LED2=1;LED3=0;LED4=1;INIT();//INIT_8266();//led=1;while(1){/*if(K1==0){while(K1==0);send_message("AT+CIPSTART=\"TCP\",\"172.28.151.1\",8080");LED4=0;}if(K2==0){while(K2==0);send_message("AT+CIPSEND=15\r\n");while(K3!=0);send_message("I can hear you!");}*/if(K1==0||Buffer=='z'||sig==1){//while(K1==0);/*send_message("zheng zhuang zhong...\n");LED1=0;LED3=1;*/for(i=0;i<N;i++){if(!CW_motor())break;}//LED1=1;//LED3=0;}if(K2==0||Buffer=='f'){/*send_message("fan zhuang zhong...\n");while(K2==0);LED2=0;LED3=1;*/for(i=0;i<N;i++){if(!CCW_motor())break;}//LED2=1;//LED3=0;}Buffer=0;  //清空Buffer的值  至下一次串行中断再获取指令值}}

最后说几点，我用的是STC89C52RC的51单片机芯片，晶振是12MHz，非常坑...根本配不出9600的波特率，误差太大，所以AT指令发送各种鬼畜，当时也是图便宜买的8266-01的模块，模块的稳定性也可能有比较大的问题，而且刚买的8266模块的波特率不是9600，也忘记是多少了，所以不是十分推荐用这种方式，下次有空会更新固件开发的文章，希望可以帮到刚入的师弟师妹或者开发者。