ARM®mbed OS入门开发设置并测试ESP8266

anywill 提问时间：2016-10-27 20:55 /

【STM32 Mbed帖子大集合】

设置并测试ESP8266 Wi Fi SOC. 设置SSID 及 PASSWORD串口打印状态信息

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ESP8266	mbed LPC1768	330uf cap
Vcc	Vout-3.3V	+
Gnd	Gnd	-
Reset	p26
RX	p28-TX
TX	p27-RX
CH_PD	Vout

须注意本模块采用3.3v供电
#include "mbed.h"
Serial pc(USBTX, USBRX);
Serial esp(D10, D2); // tx D10, rx D2
DigitalOut reset(D1);
Timer t;
int  count,ended,timeout;
char buf[1024];
char snd[255];
char ssid[32] = "mySSID";    // enter WiFi router ssid inside the quotes
char pwd [32] = "myPASSWORD"; // enter WiFi router password inside the quotes
void SendCMD(),getreply(),ESPconfig(),ESPsetbaudrate();

int main()
{
reset=0; //hardware reset for 8266
pc.baud(115200);  // set what you want here depending on your terminal program speed
pc.printf("\f\n\r-------------ESP8266 Hardware Reset-------------\n\r");
wait(0.5);
reset=1;
timeout=2;
getreply();
esp.baud(115200); // change this to the new ESP8266 baudrate if it is changed at any time.
//ESPsetbaudrate(); //******************  include this routine to set a different ESP8266 baudrate  ******************
ESPconfig();       //******************  include Config to set the ESP8266 configuration  ***********************
// continuosly get AP list and IP
while(1)
   {
      pc.printf("\n---------- Listing Acces Points ----------\r\n");
      strcpy(snd, "AT+CWLAP\r\n");
      SendCMD();
      timeout=15;
      getreply();
      pc.printf(buf);
      wait(2);
      pc.printf("\n---------- Get IP and MAC ----------\r\n");
      strcpy(snd, "AT+CIFSR\r\n");
      SendCMD();
      timeout=10;
      getreply();
      pc.printf(buf);
      wait(2);
}
}
// Sets new ESP8266 baurate, change the esp.baud(xxxxx) to match your new setting once this has been executed
void ESPsetbaudrate()
{
strcpy(snd, "AT+CIOBAUD=115200\r\n"); // change the numeric value to the required baudrate
SendCMD();
}
//  +++++++++++++++++++++++++++++++++ This is for ESP8266 config only, run this once to set up the ESP8266 +++++++++++++++
void ESPconfig()
{
wait(5);
strcpy(snd,"AT\r\n");
SendCMD();
wait(1);
strcpy(snd,"AT\r\n");
SendCMD();
wait(1);
strcpy(snd,"AT\r\n");
SendCMD();
timeout=1;
getreply();
wait(1);
pc.printf("\f---------- Starting ESP Config ----------\r\n\n");
pc.printf("---------- Reset & get Firmware ----------\r\n");
strcpy(snd,"AT+RST\r\n");
SendCMD();
timeout=5;
getreply();
pc.printf(buf);
wait(2);
pc.printf("\n---------- Get Version ----------\r\n");
strcpy(snd,"AT+GMR\r\n");
SendCMD();
timeout=4;
getreply();
pc.printf(buf);
wait(3);
// set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
pc.printf("\n---------- Setting Mode ----------\r\n");
strcpy(snd, "AT+CWMODE=1\r\n");
SendCMD();
timeout=4;
getreply();
pc.printf(buf);
wait(2);
// set CIPMUX to 0=Single,1=Multi
pc.printf("\n---------- Setting Connection Mode ----------\r\n");
strcpy(snd, "AT+CIPMUX=1\r\n");
SendCMD();
timeout=4;
getreply();
pc.printf(buf);
wait(2);
pc.printf("\n---------- Listing Access Points ----------\r\n");
strcpy(snd, "AT+CWLAP\r\n");
SendCMD();
timeout=15;
getreply();
pc.printf(buf);
wait(2);
pc.printf("\n---------- Connecting to AP ----------\r\n");
pc.printf("ssid = %s pwd = %s\r\n",ssid,pwd);
strcpy(snd, "AT+CWJAP=\"");
strcat(snd, ssid);
strcat(snd, "\",\"");
strcat(snd, pwd);
strcat(snd, "\"\r\n");
SendCMD();
timeout=10;
getreply();
pc.printf(buf);
wait(5);

pc.printf("\n---------- Get IP's ----------\r\n");
strcpy(snd, "AT+CIFSR\r\n");
SendCMD();
timeout=3;
getreply();
pc.printf(buf);
wait(1);
pc.printf("\n---------- Get Connection Status ----------\r\n");
strcpy(snd, "AT+CIPSTATUS\r\n");
SendCMD();
timeout=5;
getreply();
pc.printf(buf);
pc.printf("\n\n\n  If you get a valid (non zero) IP, ESP8266 has been set up.\r\n");
pc.printf("  Run this if you want to reconfig the ESP8266 at any time.\r\n");
pc.printf("  It saves the SSID and password settings internally\r\n");
wait(10);
}
void SendCMD()
{
esp.printf("%s", snd);
}
void getreply()
{
memset(buf, '\0', sizeof(buf));
t.start();
ended=0;
count=0;
while(!ended) {
      if(esp.readable()) {
         buf[count] = esp.getc();
         count++;
      }
      if(t.read() > timeout) {
         ended = 1;
         t.stop();
         t.reset();
      }
}
}

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13个回答

anywill 回答时间：2016-10-27 21:11:52

虚拟串口运行在115200波特率,到mbed的USB com端口（mbed com数字不同）。它将显示通过示例程序的USB虚拟串口发送 WiFi命令和状态消息
本程序将允许你检查设置是否正常，并且从WiFi路由器获取有效的IP地址。
在将代码下载到编译器窗口后，将需要查找和更改单独的WiFi设置的“SSID”和“密码”字段，然后重新编译和下载。
更改后才能连接到你的WiFi上并获取IP地址。在此代码中，SSID和密码数据在“main.cpp”中找到。
一旦你设置它，芯片会保存。某些WiFi安全设置可能需要设备的MAC地址，并且还输出此信息。
因此，要先运行此程序，并让它使用一个有效的IP地址。
如果你的初始Wi Fi设置有问题，它将显示帮助的状态消息。
转自:http://developer.mbed.org/users/ ... h-the-mbed-lpc1768/

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