Hello all!
I am quite new to this esp8266 wifi module thing. I have been given the task of working on a project that
has to do with IoT. With the help of tutorials and libraries, i was able to put the esp8266 wifi module up and running with the arduino board.
Here's where i get stucked all the time - tying up the lcd library with the esp8266 wifi skecth.
I'd greatly appreciate your help.
PS: I want to be able to view which button is clicked (or ON) and which one is in the OFF state.
Here's the code:
#include <LiquidCrystal.h>
#include <SoftwareSerial.h>
#define DEBUG true
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12,11,5,4,3,2);
SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make TX Arduino is pin 3
// This means that you need to connect the TX line from the esp to the Arduino's pin 2
// and the RX line from the esp to the Arduino's pin 3
void setup() {
// initialize the serial communications:
Serial.begin(9600);
esp8266.begin(9600); // your esp's baud rate
pinMode(10,OUTPUT);
digitalWrite(10,LOW);
pinMode(11,OUTPUT);
digitalWrite(11,LOW);
pinMode(12,OUTPUT);
digitalWrite(12,LOW);
pinMode(13,OUTPUT);
digitalWrite(13,LOW);
sendData("AT+RST\r\n",2000,DEBUG); // reset module
sendData("AT+CWMODE=2\r\n",1000,DEBUG); // configure as access point
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
// set up the LCD's number of columns and rows:
lcd.begin(16,2);
lcd.setCursor(2,0)
lcd.print()
}
void loop()
{
if(esp8266.available()) // check if the esp is sending a message
{
if(esp8266.find("+IPD,"))
{
delay(1000); // wait for the serial buffer to fill up (read all the serial data)
// get the connection id so that we can then disconnect
int connectionId = esp8266.read()-48; // subtract 48 because the read() function returns
// the ASCII decimal value and 0 (the first decimal number) starts at 48
esp8266.find("pin="); // advance cursor to "pin="
int pinNumber = (esp8266.read()-48)*10; // get first number i.e. if the pin 13 then the 1st number is 1, then multiply to get 10
pinNumber += (esp8266.read()-48); // get second number, i.e. if the pin number is 13 then the 2nd number is 3, then add to the first number
digitalWrite(pinNumber, !digitalRead(pinNumber)); // toggle pin
// make close command
String closeCommand = "AT+CIPCLOSE=";
closeCommand+=connectionId; // append connection id
closeCommand+="\r\n";
sendData(closeCommand,1000,DEBUG); // close connection
}
}
}
/*
* Name: sendData
* Description: Function used to send data to ESP8266.
* Params: command - the data/command to send; timeout - the time to wait for a response; debug - print to Serial window?(true = yes, false = no)
* Returns: The response from the esp8266 (if there is a reponse)
*/
String sendData(String command, const int timeout, boolean debug)
{
String response = "";
esp8266.print(command); // send the read character to the esp8266
long int time = millis();
while( (time+timeout) > millis())
{
while(esp8266.available())
{
// The esp has data so display its output to the serial window
char c = esp8266.read(); // read the next character.
response+=c;
}
}
if(debug)
{
Serial.print(response);
}
return response;
}