ESP8266 Community Forum

- Mon Sep 29, 2014 3:45 pm #1035 I am using one of those cheap DC-DC switcher modules. adjusted it to 3.3V connected it to the 5V of the Arduino. Works fine.

- Wed Oct 29, 2014 4:05 pm #2045 Hi all
I use arduino nano with esp module but not working. after AT+RST i don't received any message on serial port
Please give me your advices.Many many thanks.
I connected them like this (left nano , right esp)
3.3 v - vcc
gnd - gnd
tx - rx
rx - tx
3.3v - ch_pd (tried with and without this connection)


i use next sketch
#include <SoftwareSerial.h>
#define SSID "xxxxxxxx"
#define PASS "xxxxxxxx"
#define DST_IP "220.181.111.85" //baidu.com
SoftwareSerial dbgSerial(0, 1); // RX, TX // here i tried with 10,11 and 2,3
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(57600);
Serial.setTimeout(5000);
dbgSerial.begin(9600); //can't be faster than 19200 for softserial
dbgSerial.println("ESP8266 Demo");
//test if the module is ready
Serial.println("AT+RST");
delay(1000);
if(Serial.find("ready"))
{
dbgSerial.println("Module is ready");
}
else
{
dbgSerial.println("Module have no response.");
while(1);
}
delay(1000);
//connect to the wifi
boolean connected=false;
for(int i=0;i<5;i++)
{
if(connectWiFi())
{
connected = true;
break;
}
}
if (!connected){while(1);}
delay(5000);
//print the ip addr
/*Serial.println("AT+CIFSR");
dbgSerial.println("ip address:");
while (Serial.available())
dbgSerial.write(Serial.read());*/
//set the single connection mode
Serial.println("AT+CIPMUX=0");
}
void loop()
{
String cmd = "AT+CIPSTART=\"TCP\",\"";
cmd += DST_IP;
cmd += "\",80";
Serial.println(cmd);
dbgSerial.println(cmd);
if(Serial.find("Error")) return;
cmd = "GET / HTTP/1.0\r\n\r\n";
Serial.print("AT+CIPSEND=");
Serial.println(cmd.length());
if(Serial.find(">"))
{
dbgSerial.print(">");
}else
{
Serial.println("AT+CIPCLOSE");
dbgSerial.println("connect timeout");
delay(1000);
return;
}
Serial.print(cmd);
delay(2000);
//Serial.find("+IPD");
while (Serial.available())
{
char c = Serial.read();
dbgSerial.write(c);
if(c=='\r') dbgSerial.print('\n');
}
dbgSerial.println("====");
delay(1000);
}
boolean connectWiFi()
{
Serial.println("AT+CWMODE=1");
String cmd="AT+CWJAP=\"";
cmd+=SSID;
cmd+="\",\"";
cmd+=PASS;
cmd+="\"";
dbgSerial.println(cmd);
Serial.println(cmd);
delay(2000);
if(Serial.find("OK"))
{
dbgSerial.println("OK, Connected to WiFi.");
return true;
}else
{
dbgSerial.println("Can not connect to the WiFi.");
return false;
}
}

- Tue Nov 04, 2014 1:40 pm #2241 Maybe adding a cap between VCC and GND on the ESPside solve the reset problem ? I had these kind of issues on my quickly made boards and mostly that solved the issue ofc, its better to wait for an approvement from other users, just to be sure

- Sun Dec 07, 2014 7:47 am #4182 Hi guys,
I'm working on to get the same goal of tao13 ( sending commands to arduino with 192.186.1.xx/something=value strings)
But as any newbye, i cannot make it work.
If someone reached the goal, would he be so gentle to share his code so i can study and learn how to use this module in the way i supposed to do ?
i'd be very gratefull
i'm really confused right now