Master Reset ESP 8266 Wifi Module
Sometimes when working with ESP8266, the module stop replying to AT commands. To solve this issue, we have created a simple Master Reset Program to reset ESP8266 Module using Arduino Mega2560, however one can use Arduino UNO using Software Serial Library to achieve the same.
Connection Diagram:
Connect ESP8266 with Arduino mega 2560 as shown in figure above.
| Arduino Pins | ESP8266 Pin |
| RX1 (19) | TX |
| TX1 (18) | RX |
| 3.3 V | EN or CH_PD |
| 5 (Digital pin 5) | RESET |
| 3.3 V | VCC |
| GND | GND |
After connections, compile the following program and upload it to Arduino Mega 2560.
[box type=”shadow” align=”aligncenter” class=”” width=””]
void setup()
{
Serial.begin(9600);
Serial1.begin(115200);
pinMode(5, OUTPUT);
digitalWrite(5, LOW);
for(int i=0;i<=200;i++)
{
delay(50);
Serial1.println(“AT+”);
}
digitalWrite(5, HIGH);
delay(1000);
digitalWrite(5, LOW);
Serial.println(“RESET Complete”);
delay(1000);
Serial1.println(“AT”);
}
void loop()
{
if(Serial.available() > 0)
{
Serial1.write(Serial.read());
}
if(Serial1.available() > 0)
{
Serial.write(Serial1.read());
}
}[/box]
Download the Arduino Sketch to Reset ESP8266 Wifi Module: Reset ESP8266 Arduino Sketch
It may take 10 to 15 seconds to reset, and once it is done you will receive some unknown bytes on Serial monitor as shown in Figure below:
To Test ESP8266, if it is working or not, download a simple Sketch after executing this sketch, Serial Monitor should show “OK“.
Enjoy!
Version: 1.0 (dated: 22-03-2017)
Não é necessário divisir de tensão?
Não, ele possui circuito de condicionamento de sinal embutido
boa tarde tem uma parte do programa que nao funciona.
Serial1.println(“AT”);
como faço para corrigir isso.
Re-write this line by yourself in the code, sometimes when you copy the code, some of the characters are changed, that’s why the compiler shows syntax errors.
Hello i am trying to reset my esp8266 wifi module using arduino uno and base on the instruction given i have included the software serial library, but then there is an error saying “Serial1 was not declared in this scope”. Below is my entire code.
#include
void setup() {
Serial.begin(9600);
Serial1.begin(115200);
pinMode(5, OUTPUT);
digitalWrite(5, LOW);
for(int i=0;i 0)
{
Serial1.write(Serial.read());
}
if(Serial1.available() > 0)
{
Serial.write(Serial1.read());
}
}
please can someone help me
Arduino Uno has only a single serial port. You can only use Serial and not Serial1. If you have used Software serial, then replace Serial1 with the name of the software serial variable.