What is pin layout for DFRobot shield

Hardware
1

Hi!
I got my RC CAR kit but i can’t make it work. I tried the following code (adaptation of dfrobot demo code):

//Arduino PWM Speed Control：
int E1 = A5;  
int M1 = A4; 
int E2 = A6;                      
int M2 = A7;                        
 
void setup() 
{ 
    pinMode(M1, OUTPUT);   
    pinMode(M2, OUTPUT); 
} 
 
void loop() 
{ 
  int value;
  for(value = 0 ; value <= 255; value+=5) 
  { 
    digitalWrite(M1,HIGH);   
    digitalWrite(M2, HIGH);       
    analogWrite(E1, value);   //PWM Speed Control
    analogWrite(E2, value);   //PWM Speed Control
    delay(30); 
  }  
}

but it doesn’t work as expected. All i can get is single motor running at full speed.
Am i doing somethins wrong?

2

The pin layout is described in detail here: http://docs.spark.io/#/shields/spark-rc-car-kit

You can follow the example on that page to see how the Spark IO pins are connected.

Please let us know if this works out for you.

Thanks!

3

Well. Looks like i’we killed my Core during updating program. Dim ligth on D7 LED right at power-on and no response to reset button :frowning:

4

@cajax did you try putting the core in the factory reset mode? try this without the core plugged into the robot shield.

5

Hi @mohit! Yes, factory reset fixed it (but after few attempts) and demo code works perfectly