Software serial esp8266

Using Arduino Networking, Protocols, and Devices
1

Hello,
I am trying to use software serial port using esp8266. I try to send message from pin 5 same message read pin 16 and show in my pc port monitor, but program is not working. Maybe somebody have suggest why it is not working My program:

#include <SoftwareSerial.h>
#define rxPin 16
#define txPin 5
SoftwareSerial mySerial =  SoftwareSerial(rxPin, txPin);
void setup() {
   pinMode(rxPin, INPUT);
   pinMode(txPin, OUTPUT);
   mySerial.begin(115200);    
   Serial.begin(115200); 
   mySerial.setTimeout(1000);
}

void loop(){
 mySerial.println("dragunai");
 String c =  mySerial.readString();
 Serial.print(c);
 delay(2000);
  }
2

have a look at software-serial-esp8266

3

Or reduce the software serial ports down to 9600.

4

I try reduce baudrate to 9600 but result is same

5

As far as I know and as I tried, the software UART Port does not work in loop back connection. Try between two ESP8266 and an UNO.

6

the following code using the default softwareSerial library using pins D5 and D6

// ESP8266 SoftwareSerial test

#include <SoftwareSerial.h>

#define baudrate 115200//57600//38400//9600//115200

// pins Rx D5 (14) and Tx D6(12)
//SoftwareSerial mySerial(14, 12); // RX, TX
SoftwareSerial mySerial(D5, D6); // RX, TX

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(115200);
  while (!Serial) {  }
  Serial.println();
  Serial.println("ESP SoftwareSerial  test!");
  // set the data rate for the SoftwareSerial port
  mySerial.begin(baudrate);//9600);
  Serial.print("Serial test - Serial 1 at  baudrate ");
  Serial.println(baudrate);
  //while(1) mySerial.write('X');  // send continuous test
}

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

works OK to an arduino Due - I would still tend to reduce the baudrate to say 38400
Note: loopback - connecting D5 to D6 does not work

7

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