ESP8266 Community Forum

Posted: **Wed Feb 04, 2015 5:22 am**

I have a ESP8266 wired correctly with external 3.3v supply and voltage divider (5v -> 3.3v).

Here is the code I'm trying to run:

Code: Select all

#include <SoftwareSerial.h>

SoftwareSerial esp8266(10, 11); // RX, TX

void setup()  
{
  Serial.begin(9600);
  esp8266.begin(9600);
  
  esp8266.println("AT+CWJAP=\"myAPNAME\",\"myPASS\"");
}

void loop()
{
  if (esp8266.available())
    Serial.write(esp8266.read());
  if (Serial.available())
    esp8266.write(Serial.read());
}

I get strange output:

I can enter short commands manually and things work:

But longer commands do not work:

Why do long commands fail?

Posted: **Wed Feb 04, 2015 5:52 am**

because arduinos default software serial buffer is small for esp8266. i had seen some modified software serial for arduino but i dont remember where. if you use hardware serial esp8266 commands working correctly

Posted: **Wed Feb 04, 2015 9:44 am**

alonewolfx2 wrote:because arduinos default software serial buffer is small for esp8266. i had seen some modified software serial for arduino but i dont remember where. if you use hardware serial esp8266 commands working correctly

this?
http://www.hobbytronics.co.uk/arduino-s ... uffer-size

Posted: **Wed Feb 04, 2015 9:53 am**

Edit: Whoops, didn't read correctly that you were using software serial.

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