ESP8266 not working on arduino Uno

Projects Programming
1

I have esp8266 firmware. I have stack in two weeks for trying connection with the arduino. I have try some libraries to use the firmware. The last library that I use is : GitHub - itead/ITEADLIB_Arduino_WeeESP8266: An easy-to-use Arduino ESP8266 library besed on AT firmware..

I try to open the example from the libraries above, here is the code after I modified:

#include <SoftwareSerial.h>
#include "ESP8266.h"

#define SSID        "ITD.staff"
#define PASSWORD    "itdnew2015"

SoftwareSerial myserial(3,2);
ESP8266 wifi(myserial);

void setup(void)
{
    Serial.begin(9600);
    Serial.print("setup begin\r\n");

    Serial.print("FW Version: ");
    Serial.println(wifi.getVersion().c_str());
    
    Serial.print("List :");
    Serial.println(wifi.getAPList().c_str());
    
    if (wifi.setOprToStation()) {
        Serial.print("to station ok\r\n");
    } else {
        Serial.print("to station err\r\n");
    }

    if (wifi.joinAP(SSID, PASSWORD)) {
        Serial.print("Join AP success\r\n");
        Serial.print("IP: ");       
        Serial.println(wifi.getLocalIP().c_str());
    } else {
        Serial.print("Join AP failure\r\n");
    }
    
    Serial.print("setup end\r\n");
}

void loop(void)
{
}

here is the output not shown the list AP arround :

setup begin
FW Version: AT)�MR

AT veqsion:0.21.0'0
SDK vershßn:0.9.5

	OK

List :AT+CWœA(


ERRO¢

to station err
Join AP failure
setup end

please anybody help me

2

please any body help me.

3

mySerial.begin()?

4

D074:
please any body help me.

One problem seems to be, that SoftwareSerial seems not to work correctly:

FW Version: AT)�MR

AT veqsion:0.21.0'0
SDK vershßn:0.9.5

There seem to be "wrong characters" in the output.

This can either be a hardware problem. Or a software problem.

The ESP8266 is a 3.3V controller, while most Arduino boards are operating at 5.0V.

So you leave some questions unanswered:

  1. Which ESP8266 board are you using (there are at least 12 differnt modules available currently)?

  2. Full circuit schematics for connections you made between ESP8266 and Arduino UNO board and all hardware used (voltage regulators, level shifters)?

Possibly the voltage for the ESP8266 is wrong in your circuit?
UNO = 5.0 volt
ESP8266 = 3.3 volt

And about software: SoftwareSerial is a very bad Serial emulation.
I'd prefer the AltSoftSerial libray.