ESP8266 Community Forum

- Wed Feb 25, 2015 4:49 am #10675 Yeah I discovered my syntax was incorrect. It appears syntax differs from firmware version to firmware version.

However it is still acting weird. i would appreciate if somebody could test my code out please....

Code: Select all#define BUFFER 1024 // size of the buffer

#define SSID   "YourSSID"
#define PASS   "YourPassword"
#define DST_IP "173.254.30.60"

char buffer[BUFFER];

#define DEBUG Serial      // Send debug messages to serial monitor
#define ESP8266 Serial1   // Use Serial1 to talk to ESP8266 (Mwga)

// By default we are looking for OK\r\n
char OK[] = "OK\r\n";

void setup() {
  delay(1000);
  ESP8266.begin(115200);
 
  DEBUG.begin(115200);
  DEBUG.println("Starting...");
  initESP8266();
}

byte waitForResponse(int timeout, char* term=OK) {
  unsigned long t=millis();
  bool found=false;
  int i=0;
  int len=strlen(term);
  // wait for at most timeout milliseconds
  // or if OK\r\n is found
  while(millis()<(t+timeout)) {
    if(ESP8266.available()) {
      buffer[i++]=ESP8266.read();
      if(i>=len) {
        if(strncmp(buffer+i-len, term, len)==0) {
          found=true;
          break;
        }
      }
    }
  }
  buffer[i]=0;
  DEBUG.println(buffer);
  delay(100);
  return found;
}

void initESP8266() {
  // reset module
  ESP8266.println("AT+RST");
  waitForResponse(10000);
   
  // set mode 1 (client)
  ESP8266.println("AT+CWMODE=3");
  waitForResponse(5000); 
 
  // Join the Access Point
  ESP8266.print("AT+CWJAP=\"");
  ESP8266.print(SSID);
  ESP8266.print("\",\"");
  ESP8266.print(PASS);
  ESP8266.println("\"");
  waitForResponse(10000);
 
  ESP8266.println("AT+CIPMUX=0"); // Single connection
  waitForResponse(5000);
 
  ESP8266.println("AT+CIPMODE=0"); // Normal mode
  waitForResponse(5000); 
 
  DEBUG.println("============================");
}

void getTheTime() {
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += DST_IP;
  cmd += "\",80";
  ESP8266.println(cmd);  //send command to device
  waitForResponse(10000);
 
  cmd =  "GET /Test.txt HTTP/1.0\r\n\r\n";  //construct http GET request
  cmd += "Host: thearduinoguy.org\r\n\r\n";        //test file on my web
  ESP8266.print("AT+CIPSEND=");
  ESP8266.println(cmd.length());  //esp8266 needs to know message length of incoming messa
  waitForResponse(10000);
 
  ESP8266.println(cmd);
  waitForResponse(10000);
 
  DEBUG.println("------------------------------");
}

void loop() {
  delay(30000); // Check for time once a minute
  getTheTime();
}

At the moment this code is simply a test to see the responses back from the unit. I am simply interested in the date/time string back from the http header to use to set a clock.

Thanks,

Mike

http://thearduinoguy.org/

- Wed Feb 25, 2015 4:53 am #10676 have you tried to simulate that code using a serial terminal?

- Wed Feb 25, 2015 5:23 am #10679 Yes and I get similar results. I was using the serial terminal to debug the responses back originally.

It does succeed in getting the date/time back on occasion and it would be good enough for setting a clock. However i'm perplexed by the responses and the way that the code seems to skip and jump over things from time to time. The unit is not resetting and is powered by plenty of current.

http://thearduinoguy.org/