Embedded Files
This project is based on NodeMCU and L298 motor driver.
Circuit diagram
Step 1: Open arduino IDE and upload WiFi IP Finding program into NodeMCU
WiFi Finding Code Link: https://drive.google.com/open?id=1SCgIU9V5hxCYgU1uj1aUReIsjdikJNfF
Run the program and find your device IP using serial monitor of Arduino IDE.
Step 2: Now upload WiFi Robot Program. code given below and you can download from:
https://drive.google.com/open?id=1z5T96Kms1nzRcsGX8NH0U6jAqy5LbJUE
Step 3: Install WiFi App from here;
https://drive.google.com/open?id=1osXF9nSN80Ho9AHRs3JKOdFYyfn8yRgQ
WiFi Robot code:
#include <ESP8266WiFi.h>
WiFiClient client;
WiFiServer server(80);
/* WIFI settings */
const char* ssid = "YOUR SSID DISPLAY NAME";
const char* password = "YOUR SSID PASSWORD";
/* data received from application */
String data ="";
/* define L298N or L293D motor control pins */
int leftMotorForward = 2; /* GPIO2(D4) -> IN3 */
int rightMotorForward = 15; /* GPIO15(D8) -> IN1 */
int leftMotorBackward = 0; /* GPIO0(D3) -> IN4 */
int rightMotorBackward = 13; /* GPIO13(D7) -> IN2 */
/* define L298N or L293D enable pins */
int rightMotorENB = 14; /* GPIO14(D5) -> Motor-A Enable */
int leftMotorENB = 12; /* GPIO12(D6) -> Motor-B Enable */
void setup()
{
/* initialize motor control pins as output */
pinMode(leftMotorForward, OUTPUT);
pinMode(rightMotorForward, OUTPUT);
pinMode(leftMotorBackward, OUTPUT);
pinMode(rightMotorBackward, OUTPUT);
/* initialize motor enable pins as output */
pinMode(leftMotorENB, OUTPUT);
pinMode(rightMotorENB, OUTPUT);
/* start server communication */
server.begin();
}
void loop()
{
/* If the server available, run the "checkClient" function */
client = server.available();
if (!client) return;
data = checkClient ();
/************************ Run function according to incoming data from application *************************/
/* If the incoming data is "forward", run the "MotorForward" function */
if (data == "forward") MotorForward();
/* If the incoming data is "backward", run the "MotorBackward" function */
else if (data == "backward") MotorBackward();
/* If the incoming data is "left", run the "TurnLeft" function */
else if (data == "left") TurnLeft();
/* If the incoming data is "right", run the "TurnRight" function */
else if (data == "right") TurnRight();
/* If the incoming data is "stop", run the "MotorStop" function */
else if (data == "stop") MotorStop();
}
/********************************************* FORWARD *****************************************************/
void MotorForward(void)
{
digitalWrite(leftMotorENB,HIGH);
digitalWrite(rightMotorENB,HIGH);
digitalWrite(leftMotorForward,HIGH);
digitalWrite(rightMotorForward,HIGH);
digitalWrite(leftMotorBackward,LOW);
digitalWrite(rightMotorBackward,LOW);
}
/********************************************* BACKWARD *****************************************************/
void MotorBackward(void)
{
digitalWrite(leftMotorENB,HIGH);
digitalWrite(rightMotorENB,HIGH);
digitalWrite(leftMotorBackward,HIGH);
digitalWrite(rightMotorBackward,HIGH);
digitalWrite(leftMotorForward,LOW);
digitalWrite(rightMotorForward,LOW);
}
/********************************************* TURN LEFT *****************************************************/
void TurnLeft(void)
{
digitalWrite(leftMotorENB,HIGH);
digitalWrite(rightMotorENB,HIGH);
digitalWrite(leftMotorForward,LOW);
digitalWrite(rightMotorForward,HIGH);
digitalWrite(rightMotorBackward,LOW);
digitalWrite(leftMotorBackward,HIGH);
}
/********************************************* TURN RIGHT *****************************************************/
void TurnRight(void)
{
digitalWrite(leftMotorENB,HIGH);
digitalWrite(rightMotorENB,HIGH);
digitalWrite(leftMotorForward,HIGH);
digitalWrite(rightMotorForward,LOW);
digitalWrite(rightMotorBackward,HIGH);
digitalWrite(leftMotorBackward,LOW);
}
/********************************************* STOP *****************************************************/
void MotorStop(void)
{
digitalWrite(leftMotorENB,LOW);
digitalWrite(rightMotorENB,LOW);
digitalWrite(leftMotorForward,LOW);
digitalWrite(leftMotorBackward,LOW);
digitalWrite(rightMotorForward,LOW);
digitalWrite(rightMotorBackward,LOW);
}
/********************************** RECEIVE DATA FROM the APP ******************************************/
String checkClient (void)
{
while(!client.available()) delay(1);
String request = client.readStringUntil('\r');
request.remove(0, 5);
request.remove(request.length()-9,9);
return request;
}
WiFi IP finding code:
#include <ESP8266WiFi.h>
WiFiClient client;
WiFiServer server(80);
const char* ssid = "Infotrust India Pvt. Ltd.";
const char* password = "matadi2876";
void setup()
{
Serial.begin(115200);
connectWiFi();
server.begin();
}
void loop()
{
}
void connectWiFi()
{
Serial.println("Connecting to WIFI");
WiFi.begin(ssid, password);
while ((!(WiFi.status() == WL_CONNECTED)))
{
delay(300);
Serial.print("..");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("NodeMCU Local IP is : ");
Serial.print((WiFi.localIP()));
}
Google Sites
Report abuse