Hello I am doing a project I saw on instructables and I can't do it, I am using an esp 8266 8-pin wifi card which is connected to the pins 2 and 3 (who partnered to serial port) but i don't receive any data i asked in the code, already checked the connections in the serial,the wifi card, and the COM ports.
would greatly appreciate the help
here is my code
#include <SoftwareSerial.h>
SoftwareSerial esp8266(3, 2);
#define DEBUG true
int state = 5;
//define motor pins
const int motor1Pin1 = 5;
const int motor1Pin2 = 6;
const int motor2Pin1 = 9;
const int motor2Pin2 = 10;
//define motor speed
int motorSpeed = 150;
void setup()
{
pinMode(motor1Pin1, OUTPUT);
pinMode(motor1Pin2, OUTPUT);
pinMode(motor2Pin1, OUTPUT);
pinMode(motor2Pin2, OUTPUT);
Serial.begin(9600);
esp8266.begin(9600);
sendData("AT+RST\r\n", 2000, DEBUG);
sendData("AT+CWMODE=1\r\n", 1000, DEBUG);
sendData("AT+CWJAP=\"Project1\",\"noconectar\"\r\n", 2000, DEBUG);
delay(10000); //wait for connection
sendData("AT+CIFSR\r\n", 1000, DEBUG);
sendData("AT+CIPMUX=1\r\n", 1000, DEBUG);
sendData("AT+CIPSERVER=1,80\r\n", 1000, DEBUG);
}
void loop()
{
if (esp8266.available()) //verify incoming data
{
if (esp8266.find("+IPD,")) //if there is a message
{
String msg;
esp8266.find("?"); //look for the message
msg = esp8266.readStringUntil(' '); //read whole message
String command = msg.substring(0, 3); //first 3 characters = command
Serial.println(command);
//move forward
if(command == "cm1") {
state = 1;
}
//move backward
if(command == "cm2") {
state = 2;
}
//turn right
if(command == "cm3") {
state = 3;
}
//turn left
if(command == "cm4") {
state = 4;
}
//do nothing
if(command == "cm5") {
state = 5;
}
}
}
//STATE 1: move forward
if (state == 1) {
analogWrite(motor1Pin1, motorSpeed);
digitalWrite(motor1Pin2, LOW);
analogWrite(motor2Pin1, motorSpeed);
digitalWrite(motor2Pin2, LOW);
}
//STATE 2: move backward
if (state == 2) {
digitalWrite(motor1Pin1, LOW);
analogWrite(motor1Pin2, motorSpeed);
digitalWrite(motor2Pin1, LOW);
analogWrite(motor2Pin2, motorSpeed); }
//STATE 3: move right
if (state == 3) {
analogWrite(motor1Pin1, motorSpeed);
digitalWrite(motor1Pin2, LOW);
digitalWrite(motor2Pin1, LOW);
analogWrite(motor2Pin2, motorSpeed);
}
//STATE 4: move left
if (state == 4) {
digitalWrite(motor1Pin1, LOW);
analogWrite(motor1Pin2, motorSpeed);
analogWrite(motor2Pin1, motorSpeed);
digitalWrite(motor2Pin2, LOW);
}
//STATE 5: do nothing
if (state == 5) {
digitalWrite(motor1Pin1, LOW);
digitalWrite(motor1Pin2, LOW);
digitalWrite(motor2Pin1, LOW);
digitalWrite(motor2Pin2, LOW);
}
}
//*******************
//Auxiliary functions
//*******************
String sendData(String command, const int timeout, boolean debug)
{
String response = "";
esp8266.print(command);
long int time = millis();
while ( (time + timeout) > millis())
{
while (esp8266.available())
{
char c = esp8266.read();
response += c;
}
}
if (debug)
{
Serial.print(response);
}
return response;
}
