esp8266 e-01 + arduino uno help
Posted:
Fri Aug 14, 2015 12:10 pmby Omry Isa
hi guys
i'm really having a difficulty to connect the esp to arduino.
wiring going like this:
GND to GND
VCC to 3.3v on arduino uno
URXD to RX=pin0
UTXD to TX=pin 1
CH_PD to 3.3v
I did upload a blank skitch to the arduino, set "Both NL & CR" and the baud rate to 115200.
AT command returns ok
AT+GMR returns:
AT+GMR
AT version:0.25.0.0(Jun 5 2015 16:27:16)
SDK version:1.1.1
Ai-Thinker Technology Co. Ltd.
Jun 5 2015 23:07:20
OK
can someone help me how to set it up as server so i can turn on and off a pin on arduino.
i've seen alot of youtube vids and read alot of tutrials but still nothing work out.
i did connect the esp module to my router ssid and i get ping replys from it.
can someone help please?
thanx
Re: esp8266 e-01 + arduino uno help
Posted:
Fri Aug 14, 2015 2:15 pmby martinayotte
Doing a server using AT commands is over complexifying things if your adruino doesn't do much other stuff than controlling a LED pin.
Maybe you should use a stand-alone ESP with ArduinoIDE WebServer sketch, it will be much more efficient.
Re: esp8266 e-01 + arduino uno help
Posted:
Tue Aug 18, 2015 1:54 pmby WStan
I do not remember where I found this code unfortunately .
I 've changed reading of DHT to constant values just for testing purpose.
Code: Select all
#include <SoftwareSerial.h>
#define DEBUG true
//#include <DHT.h>
//DHT dht(3, DHT11);
String str1 ="";
SoftwareSerial espSerial(2,3); // UNO 2-RX. 3 TX
void setup()
{
Serial.begin(9600);
espSerial.begin(115200); // your esp's baud rate might be different
// pinMode(3, INPUT); // DHT11
// dht.begin();
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
sendData("AT+RST\r\n",2000,DEBUG); // reset module
sendData("AT+CWMODE=1\r\n",1000,DEBUG); // configure standard node
sendData("AT+CWJAP=\"@HomeCA72\",\"\"\r\n",5000,DEBUG);
// sendData("AT+CIPSTA=192.168.24.108\r\n",5000,DEBUG);
sendData("AT+CIFSR\r\n",1000,DEBUG); // get ip address
sendData("AT+CIPMUX=1\r\n",1000,DEBUG); // configure for multiple connections
sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // turn on server on port 80
digitalWrite(13, HIGH);
}
void loop()
{
// sendData("AT+CIPSTATUS\r\n",1000, DEBUG);
// sendData("AT+CIPCLOSE=0\r\n",1000, DEBUG);
// sendData("AT+CIPCLOSE=1\r\n",1000, DEBUG);
if(espSerial.available()) // check if the esp is sending a message
{
if(espSerial.find("+IPD,"))
{
delay(1000);
Serial.println("------------------------------------------------------------------------------------connectionId= ");
int connectionId = espSerial.read()-48; // subtract 48 because the read() function returns
// the ASCII decimal value and 0 (the first decimal number) starts at 48
Serial.print("connectionId= "); Serial.println(connectionId);
float h = 22.2;//Humidity();
float t = 21.0;//Temperature();
String webpage = "<html><head><title>ESP8266 web server</title></head><body><h1>Hello world!</h1>";
webpage += "<br>Temperature: ";
webpage += t;
webpage += "<br>Humidity: ";
webpage += h;
webpage += "</body></html>\r\n";
String cipSend = "AT+CIPSEND=";
cipSend += connectionId;
cipSend += ",";
cipSend +=webpage.length();
cipSend +="\r\n";
sendData(cipSend,1000,DEBUG);
sendData(webpage,3000,DEBUG);
delay(2000);
String closeCommand = "AT+CIPCLOSE=";
closeCommand+=connectionId; // append connection id
closeCommand+="\r\n";
sendData(closeCommand,1000,DEBUG);
delay(1000);
}
}
// sendData("AT+CIPSTATUS\r\n",1000, DEBUG);
delay(2000); //wsp
}
void sendData(String command, const int timeout, boolean debug)
{
espSerial.print(command); // send the read character to the esp8266
long int time = millis();
while( (millis() - time) < timeout)
{
while(espSerial.available())
{
char c = espSerial.read(); // read the next character.
Serial.print(c);
}
}
}