ESP8266 Community Forum

- Thu May 26, 2016 4:16 pm #48082 I have recently bought a ESP12-F but when I try to hook it up to my Arduino, it fails to work. Is this my fault or is the ESP12-F not functioning?
pins:
TX to software RX arduino (a software generated RX)
RX to TX arduino (using a voltage divider) (also a software generated TX, so I can use the regular Serial to display the information given by the ESP)
Vcc to 3V3 (either arduino or a separate power supply, both give the same problem)
GND to ground
GPIO15 to ground
EN to 3V3
RST to 3V3

Arduino Software:

Code: Select all#include <SoftwareSerial.h>

SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make TX Arduino line is pin 3.
                             // This means that you need to connect the TX line from the esp to the Arduino's pin 2
                             // and the RX line from the esp to the Arduino's pin 3
void setup() {
  Serial.begin(9600);
  esp8266.begin(74880); // your esp's baud rate might be different
}
 
void loop()
{
  if(esp8266.available()) // check if the esp is sending a message
  {
    while(esp8266.available())
    {
      // The esp has data so display its output to the serial window
      char c = esp8266.read(); // read the next character.
      Serial.print(c);
    } 
  }
  if(Serial.available())
  {
    // the following delay is required because otherwise the arduino will read the first letter of the command but not the rest
    // In other words without the delay if you use AT+RST, for example, the Arduino will read the letter A send it, then read the rest and send it
    // but we want to send everything at the same time.
    delay(1000);
   
    String command="";
   
    while(Serial.available()) // read the command character by character
    {
        // read one character
      command+=(char)Serial.read();
    }
    esp8266.println(command); // send the read character to the esp8266
  }
}


This code is not written by me, I just used it to test the hardware.

When I start up the ESP8266, the blue light is on and the Serial Monitor keeps spamming information. There is a Fatal Exception (0).

What am I doing wrong?