Car project

Need Help With My Project
1

Hello,

I try to add the joystick, but seems there is an error?

First of all I can’t add a joystick via the Web Dashboard only by the Mobile Dashboard. I did that, but then I can’t see the joystick in the Web Dashboard? I can’t change the datastreams in this case. The new Blynk 2.0 is very strange to navigate.
Can someone please help me with this problem?
Esp8266 + 2 motor drivers
Iphone
• Blynk server
• Blynk Library version, latest

2

There is no joystick widget for the web dashboard, only mobile.

You need to explain more about your datastream issues if you want assistance in that area.

Pete.

3

This new blynk 2.0, the Joystick widget has no minimum and maximum value range
I need to set the values from app, but I don’t know how?

They made this app more difficult.

4 

#define BLYNK_PRINT Serial


#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

//Motor A
const int inputPin1  = 5;    // Pin 15 of L293D IC, D1 Pin of NodeMCU
const int inputPin2  = 16;    // Pin 10 of L293D IC, D0 Pin of NodeMCU
//Motor B
const int inputPin3  = 4;    // Pin  7 of L293D IC, D2 Pin of NodeMCU
const int inputPin4  = 0;    // Pin  2 of L293D IC, D3 Pin of NodeMCU
int EN1 = 12;                 // Pin 1 of L293D IC, D6 Pin of NodeMCU
int EN2 = 14;                 // Pin 9 of L293D IC, D5 Pin of NodeMCU
// Led Light Pin
const int Ledpin = 10;
//---------------

#define BLYNK_DEVICE_NAME "RC "
#define BLYNK_TEMPLATE_ID "TMPLVQkp0ic3"
char auth[] = "--";  //Blynk Authentication Token
char ssid[] = "--";           //WIFI Name
char pass[] = "--";           //WIFI Password

BLYNK_WRITE(V1)
{
  int x = param[0].asInt();
  int y = param[1].asInt();

  // Do something with x and y
  Serial.print("X = ");
  Serial.print(x);
  Serial.print("; Y = ");
  Serial.println(y);

//  int speed =350;
//  analogWrite(EN1, speed);//sets the motors speed
//  analogWrite(EN2, speed);//sets the motors speed
// Joystick Movement
  if (y>350)
  {
    Serial.print("forward");
    forward();
  }

  if (y<170) 
    {
      Serial.print("backward");
      backward();
    }

   if (x<132)
    {
      Serial.print("left");
      left();
    }
 
  if (x>380) 
    {
      Serial.print("right");
      right();
    }

  if ((y==256) && (x==256))
    {
      Serial.print("stop");
      stop();
     }

}

//----------------------
BLYNK_WRITE(V2)
{
  int speed = param.asInt(); // assigning incoming value from pin V2 to a variable
    //speed =350;
    analogWrite(EN1, speed);//sets the motors speed
    analogWrite(EN2, speed);//sets the motors speed

}
//------------------------




void setup()
{
    pinMode(EN1, OUTPUT);   // where the motor is connected to
    pinMode(EN2, OUTPUT);   // where the motor is connected to
    pinMode(inputPin1, OUTPUT);
    pinMode(inputPin2, OUTPUT);
    pinMode(inputPin3, OUTPUT);
    pinMode(inputPin4, OUTPUT);  
    pinMode(Ledpin, OUTPUT);
  
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
}

void loop()
{
  Blynk.run();

}

void left(void)
{
    digitalWrite(inputPin1, HIGH);
    digitalWrite(inputPin2, LOW);
    digitalWrite(inputPin3, HIGH);
    digitalWrite(inputPin4, LOW);  
}

void right(void)
{
    digitalWrite(inputPin1, LOW);
    digitalWrite(inputPin2, HIGH);
    digitalWrite(inputPin3, LOW);
    digitalWrite(inputPin4, HIGH); 
}

void stop(void)
{ 
    digitalWrite(inputPin1, LOW);
    digitalWrite(inputPin2, LOW);
    digitalWrite(inputPin3, LOW);
    digitalWrite(inputPin4, LOW); 
}

void backward(void)
{   
    digitalWrite(inputPin1, LOW);
    digitalWrite(inputPin2, HIGH);
    digitalWrite(inputPin3, HIGH);
    digitalWrite(inputPin4, LOW); 
}

void forward(void)
{ 
    digitalWrite(inputPin1, HIGH);
    digitalWrite(inputPin2, LOW);
    digitalWrite(inputPin3, LOW);
    digitalWrite(inputPin4, HIGH); 
}
5

This is the code I used.

Best regards,
Tom

6

Please edit your post and add triple backticks ( ``` ) before and after your sketch.

7

This topic might help you

8

The range is set using the min/max values in the datastream for each axis.

Pete.