Reading Serial response from AT command (ESP8266,ESP-01) problem

Projects Programming
1

Hello,

Im trying to get html response from server via esp01 module

when using the serial monitor in arduino studio everything works fine

here is the serial monitor output

AT+CIPSTART="TCP","aaaa.aaaa",80

CONNECT

OK
AT+CIPSEND=43


OK
> 
Recv 43 bytes

SEND OK

+IPD,227:HTTP/1.1 200 OK
Date: Sat, 19 Jan 2019 18:42:58 GMT
Server: Apache
X-Powered-By: PHP/7.2.11
Vary: Accept-Encoding,User-Agent
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

10
Hello from server

0

CLOSED

but when im trying to do the same from the sketch my response is returned partially (63 bytes always)

AT+CIPSTART="TCP","aaaa.aaaa",80

CONNECT

OK
AT+CIPSEND=43


OK
> 
Recv 43 bytes

SEND OK

+IPD,227:HTTP/1.1 200 OK
Date: S

it ends on the first letter of date for some reason

here is my sketch

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX //serial for comunication with esp
void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  mySerial.setTimeout(5000);//dont know if i need this

  delay(10000);

  //check wifi module
  mySerial.println("AT");
  delay(1000);
  if(mySerial.find("OK"))
  {
    Serial.println("Initializing");
  }else{
    Serial.println("Error initializing");
  }
}

void loop() { // run over and over

  Serial.println("go");
mySerial.println("AT+CIPSTART=\"TCP\",\"aaaa.aaaa\",80");
delay(1000);
    while(mySerial.available()){
    Serial.write(mySerial.read());
     delay(1);
  }
mySerial.println("AT+CIPSEND=43");
delay(1000);
    while(mySerial.available()){
    Serial.write(mySerial.read());
     delay(1);
  }
mySerial.println("GET /load.php HTTP/1.1");
delay(100);
    while(mySerial.available()){
    Serial.write(mySerial.read());
     delay(1);
  }
mySerial.println("Host: aaaa.aaaa");
delay(100);
    while(mySerial.available()){
    Serial.write(mySerial.read());
     delay(1);
  }
mySerial.println("");
delay(2000);


    while(mySerial.available()){
    Serial.write(mySerial.read());
     //delay(100);
  }

delay(5000);

}

what is the reason for this behavior? how can i fix this?
i've tried increasing baud rate. this did not helped.

2

All those delay()s just get in the way. Have a look at the examples in Serial Input Basics - simple reliable ways to receive data.

...R

3

Robin2:
All those delay()s just get in the way. Have a look at the examples in Serial Input Basics - simple reliable ways to receive data.

...R

but i need some kind of delay to receive response from the server.
how would you approach that?

4

kosmos1:
but i need some kind of delay to receive response from the server.

Why?

Generally speaking a "listener" should be listening all the time in case it misses something.

You need to give more details of what you are trying to achieve.

...R

5

Of course Robin is right about advising you to go for a 'non-blocking' Serial reception, but that has nothing to do with your issue.mySerial.print("AT+CIPSTART=\"TCP\",\"aaaa.aaaa\",80\r\n");ESP AT-mode needs both CR & NL as a line ending (which is what you must have 'set' in your Serial Monitor or you would be having the same issue.