ESP8266

please what is the best solution for esp8226 with Arduino error..
such as espcomm syn_failed

herbeysoft:
please what is the best solution for esp8226 with Arduino error..
such as espcomm syn_failed

Did you select esptool as programmer.

I have tried to connect ESP8266 (version 12) module to Arduino Uno. I have wired it as follows:
Arduino --- ESP8266
RX --- TX
TX --- RX
3.3V --- VCC ; CH_PD ; GPIO 2
GND --- GND ; GPIO15

When I type AT into serial monitor on Arduino IDE, I get no response.
I want to use this module as an Arduino Shield with the Arduino to connect to iOS App, but cannot simply get it to connect and respond to Arduino.

Looking for urgent replies,

Regards,

Tara

tduggan63:
I have tried to connect ESP8266 (version 12) module to Arduino Uno. I have wired it as follows:
Arduino --- ESP8266
RX --- TX
TX --- RX
3.3V --- VCC ; CH_PD ; GPIO 2
GND --- GND ; GPIO15

When I type AT into serial monitor on Arduino IDE, I get no response.
I want to use this module as an Arduino Shield with the Arduino to connect to iOS App, but cannot simply get it to connect and respond to Arduino.

Google the setup before running.

Looking for urgent replies,

Regards,

Tara

You might have killed your esp8266.
The Arduino UNO Serial is sending out 5V signals into your esp8266. YOU need a logic converter to convert the 5V to 3.3v signal.

When I type AT into serial monitor on Arduino IDE, I get no response.

What Serial speeds have you tried? Apparently different vendors have shipped ESP8266 modules with different default speeds. Try all the standard speeds between 9600 and 115200...
(Also, be careful of your line endings...)

Hey Guys,

need some help over here,

I am using ESP8266 01 (black edition) and Arduino mega 2560. Now, I just want to transfer data from arduino mega to thingspeak using esp8266 module.

Connection which I have found through internet I have implemented that in ARDUINO UNO board and it works completeley fine BUT, if that same connection I m doing in ARDUINO MEGA 2560 board then it is showing me the below errors:

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

Please help me out....Thank you in advance...

Ditto on connecting the ESP8266 to an Arduino properly. You need to both level-shift the signals AND provide a proper 3.3v power supply as the Arduino's 3.3v pin doesn't provide enough current to properly power the ESP8266. There are now daughterboards for the ESP8266 that do both. I've seen them on eBay for a buck or so. I built my own a while back. Nothing complicated but it has to be done for it to work.

Btw, I'm still communicating with my ESP8266 using standard Serial commands. Is there a decent, reliable library for it at this point, analogous to ones for Ethernet or WiFi shields? I basically wrote my own, in the form of functions to open and close a TCP connection, send an HTTP command, etc., but a standard library would be nice.

Facing similar issue with my ESP8266-01 with Arduino UNO R3.

I can't sent the AT command as I am getting loop of FatalException(0) as below as soon as I connect to ESP8266 module: (Can't make out what does this mean)

Fatal exception 0(IllegalInstructionCause):
epc1=0x40201364, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000 ets
Jan 8 2013,rst cause:2,
boot mode:(3,6) load 0x40100000,
len 1856,
room 16 tail 0
chksum 0x63
load 0x3ffe8000,
len 776,
room 8 tail 0
chksum 0x02
load 0x3ffe8310,
len 552,
room 8 tail 0
chksum 0x79
csum 0x79
2nd boot version : 1.5
SPI Speed : 40MHz
SPI Mode : DIO
SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run
user1 @ 1000

Following are my ESP8266 connection details:

  1. Vcc - 3.3v external supply (GND connected to GND of 3.3v and GND of 5v of Arduino)
  2. CH_PD - 3.3v
  3. GPIO0 - Tried keeping 3.3v (Same Error)
    disconnected (Same Error)
    GND (Same Error)--(Just tried. I know this will be the programming mode)
  4. Rx - Rx of Arduino UNO via voltage divider
  5. Tx - Tx of Arduino
    (Tried with exchanging Rx and TX)
  6. RST - Disconnected (Same Error)
    3.3v (Same Error)
    (Used the GND pulse to reset the ESP8266)

I also tried connecting RESET of Arduino UNO to GND with no success ;( .

I checked the output with all the baud rates keeping "Both NL & CR" option selected. For baud rate 115200 I am getting the above exception. For rest it showing some garbage values.

I have uploaded bareMinimum example in the Arduino UNO to start with.

Any suggestion, pointer will be really appreciated.

Is my module damaged? Never used it with anything other than 3.3v though.

Thanks.

Hello I'm doing a project to recognize ssid of the model 5 esp8266, inside it has a menu with some bus lines would like to make a third button to call the string ssid cuff can help me

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

//entrada dos pinos Digital Pwm

#define butUp 10 //Pino
#define butDown 9 //Pino
#define butSetar 8

int id ;

void changeMenu();
void dispMenu();

String SSAID ;

void SalvLiCent();
void CletCent();
void VillCamIICent();
void BenBentCentJaci();
void EusGCent();

// *** Variáveis Globais ***

String ssid [5];

ssid [0] = "{b2@U}"
ssid [1] = "{ac@U}"
ssid [2] = "{h82c0U}"
ssid [3] = "{B1AU0}"
ssid [4] = "{]02@U}"

char menu = 0x01;
char seta = 0x00;
boolean t_butUp, t_butDown, t_butSetar;

// --- Hardware do LCD ---
LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);

// *** Configurações Iniciais ***

void setup() {
lcd.begin(16, 2);

for (char i = 9; i < 13; i++) pinMode(i, INPUT_PULLUP);

t_butUp = 0x00;
t_butDown = 0x00;

}

// ** Loop Infinito ***
void loop() {

changeMenu();
dispMenu();

}

void espset {

while (true){

if (ESP.available()){
Serial.write(ESP.read());
}

if (Serial.available()){
ESP.write(Serial.read());
}
}

// *** Desenvolvimento das Funções Auxiliares ***

void changeMenu()
{

if (!digitalRead(butUp)) t_butUp = 0x01; //Botão up pressionado seta flag
if (!digitalRead(butDown)) t_butDown = 0x01; //Botão down pressionado seta flag

if (digitalRead(butUp) && t_butUp) //Botão up solto e flag setada
{
t_butUp = 0x00; //Limpa flag

lcd.clear(); //Limpa display
menu++; //Incrementa menu

if (menu > 0x05) menu = 0x01; //Se menu maior que 3, volta a ser 1

}

if (digitalRead(butDown) && t_butDown) //Botão Down solto e flag setada
{ //Sim...
t_butDown = 0x00; //Limpa flag

lcd.clear(); //Limpa display
menu--; //Decrementa menu

if (menu < 0x01) menu = 0x05; //Se menu menor que 1, volta a ser 3 (PODE ADD MAIS PAGINAS)

changeMenu();
dispMenu();

}

}

void dispMenu() //Mostra o menu atual
{

switch (menu)
{
case 0x01:
SalvLiCent();
break;

case 0x02:
CletCent();
break;

case 0x03:
VillCamIICent();
break;

case 0x04:
BenBentCentJaci();
break;

case 0x05:
EusGCent();
break;

}

SSAID = ssid [id];
pinMode(RST, OUTPUT);
digitalWrite(RST, LOW);
delay(300);
digitalWrite(RST, HIGH);

}

}

void SalvLiCent() //Linha Ponta verdade (menu1)
{
id = 0;
lcd.setCursor(0, 1);
lcd.print("SALVADOR LIRA/CENTRO");
lcd.scrollDisplayLeft();
delay(150);

}

void CletCent() //Linhda Cruz das almas (menu2)
{
id = 1;
lcd.setCursor(0, 1);
lcd.print("CLETO MARQUES LUZ/CENTRO");
lcd.scrollDisplayLeft();
delay(150);

}

void VillCamIICent() //Linhda Centro (menu3)
{
id = 2;
lcd.setCursor(0, 1);
lcd.print("VILLAGE CAMPESTRE II / CENTRO");
lcd.scrollDisplayLeft();
delay(150);

}

void BenBentCentJaci() {
id = 3;
lcd.setCursor(0, 1);
lcd.print("B. BENTES/CENTRO/JACINTINHO");
lcd.scrollDisplayLeft();
delay(150);

}

void EusGCent() {
id = 4;
lcd.setCursor(0, 1);
lcd.print("EUSTAQUIO GOMES/CENTRO");
lcd.scrollDisplayLeft();
delay(150);

}

void butSetar (){

if (!digitalRead (butSetar)) t_butSetar = 0x01;

if(digitalRead (butSetar) && t_butSetar){

t_butSetar = 0x00

seta ++;

if (seta > 2) sete = 0x01;

switch (seta){

case 0x01:
digitalWrite( SSAID [id], HIGH)
break;
}
}

}

Kindly follow the steps as given in the blog post..!
Hope it helps you..

http://hackshaders.blogspot.in/2017/05/how-to-blink-led-using-esp8266-arduino.html

Do you know a 8266 based module for linking two controllers via a serial bus? Wireless serial cable.

I am testing two ESP-01 modules but linking is difficult with them. What I know a web server and suitable request are needed. Something simpler for raw data would be enough.

Hello Guyz, I am working on ESP01 wifi project with Arduino IDE 1.8.2. but whenever i tried to work on ESP8266.h it gives me error like

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

Ive already install ESP8266 Generic Board.

Please give me advice. Thank you.

there are some codes available on "GitHub - esp8266/Arduino: ESP8266 core for Arduino" . I made the code work by modifying it a little but the main problem is that it Exchange data only once ,the server closes the connection when a one data exchanged .i want a continues TCP socket connection (send/receive )

this is my code :

#include <ESP8266WiFi.h>

const char *ssid = "ESPaliAP";
const char *password = "12345678hamed";

WiFiServer server(21);

char incomingPacket[255];
char replyPacekt[] = "Hi there! Got the message :-)";

// the setup function runs once when you press reset or power the board
void setup() {
pinMode(2, OUTPUT);
digitalWrite(2, 1);
delay(1000);
Serial.begin(115200);
Serial.println();
Serial.print("Configuring access point...");
WiFi.disconnect();
delay(100);
WiFi.mode(WIFI_STA);
// You can remove the password parameter if you want the AP to be open.
WiFi.softAP(ssid, password);

IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);

// Start the server
server.begin();
Serial.println("Server started");

// Print the IP address
Serial.println(WiFi.localIP());
}

void loop()

{

// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}

// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}

// Read the first line of the request
String req = client.readStringUntil('\r');
Serial.println(req);
client.flush();

// Match the request
int val;
if (req.indexOf("/gpio/0") != -1)
val = 1;
else if (req.indexOf("/gpio/1") != -1)
val = 0;
else {
Serial.println("invalid request");
client.stop();
return;
}

// Set GPIO2 according to the request
digitalWrite(2, val);

client.flush();

// Prepare the response
String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n\r\n\r\nGPIO is now ";
s += (val)?"high":"low";
s += "\n";

// Send the response to the client
client.print(s);
delay(1);
Serial.println("Client disonnected");

// The client will actually be disconnected
// when the function returns and 'client' object is detroyed

}

Hi guys
I'm currently working on a project that involves sending and receiving text via wifi. I'm using esp8266 01 for this. I've done my basic settings, everything seems cool with AT commands. I even used it as a webserver. But the problem lies in getting http get response. Whenever I receive anything with space and some characters, mt response will have + sign and some %c ....characters. I know they are the ascii equivalent of the sent characters. PLease guys, how may I remove those unwanted characters? I tried to use esp8266Wifi library, but installing it has never been successful, getting all sort of errors (like functional.h, queue.h, etc). Please guy assist me. Thanks

http response is usually url encoded. You need to url decode. Use this

Hi All,

I am having real problems access the AT commands.

I have the following set up between a nano and the ESP-8266:

GND------->GND
VCC-------->+3.3v
CH_PD---->+3.3v
TX--------->RX
RX--------->tx

I am using the flowing code as a serial through:

#include <SoftwareSerial.h>
SoftwareSerial softSerial(2, 3); // RX, TX

void setup() 
{
  uint32_t baud = 9600;
  Serial.begin(baud);
  softSerial.begin(baud);
  Serial.print("SETUP!! @");
  Serial.println(baud);
}

void loop() 
{
    while(softSerial.available() > 0) 
    {
      char a = softSerial.read();
      if(a == '\0')
        continue;
      if(a != '\r' && a != '\n' && (a < 32))
        continue;
      Serial.print(a);
    }
    
    while(Serial.available() > 0)
    {
      char a = Serial.read();
      Serial.write(a);
      softSerial.write(a);
    }
}

When i send AT the blue led flashes once very quickly on the ESP-8266 but i get no response back.

I have tried various baud rates but to no avail.

I have been searching for day on the web, but to no avail, anyone see what I am missing?

thanks in advance

JonMiles:
Hi All,

I am having real problems access the AT commands.

I have the following set up between a nano and the ESP-8266:

GND------->GND
VCC-------->+3.3v
CH_PD---->+3.3v
TX--------->RX
RX--------->tx

I am using the flowing code as a serial through:

#include <SoftwareSerial.h>

SoftwareSerial softSerial(2, 3); // RX, TX

void setup()
{
  uint32_t baud = 9600;
  Serial.begin(baud);
  softSerial.begin(baud);
  Serial.print("SETUP!! @");
  Serial.println(baud);
}

void loop()
{
    while(softSerial.available() > 0)
    {
      char a = softSerial.read();
      if(a == '\0')
        continue;
      if(a != '\r' && a != '\n' && (a < 32))
        continue;
      Serial.print(a);
    }
   
    while(Serial.available() > 0)
    {
      char a = Serial.read();
      Serial.write(a);
      softSerial.write(a);
    }
}




When i send AT the blue led flashes once very quickly on the ESP-8266 but i get no response back.

I have tried various baud rates but to no avail.

I have been searching for day on the web, but to no avail, anyone see what I am missing?

thanks in advance

Start your own thread so that your problem will get the attention it needs.

You shouldn't hijack someone else's thread.

I thought this was a thread all about the esp8266. It even says that in the first post.......

JonMiles:
I thought this was a thread all about the esp8266. It even says that in the first post.......

You'll notice that the other topics have nothing to do with your problem.

If you want your post to be noticed, create your own thread.

If you don't care, then that is fine too.

For AT Commands don't assume the logical approach of UNO TX to ESP RX... Try TX to TX and RX to RX.

Also understand contents of the following link: Send AT commands to ESP8266 from Arduino Uno via a SoftwareSerial port - Arduino Stack Exchange

Enjoy...