I made some simple code and car using 1 arduino, 1 hc-05, 2 L298N, and 4 batteries. I control them with the app Bluetooth RC controller on android. When I send a command on the app, the car sometimes has some delays, varying 4-8 seconds, sometimes it disconnects completely. Here is the code. I don't think the code has any problem and my friend brought up that the problem might be the distortion from a magnetic field because I use some lead to weld some wires
char t;
int fr1= 2;
int fr2=3;
int fl1=12;
int fl2=13;
int br1=4;
int br2=5;
int bl1 = 7;
int bl2=8;
int Mfr=6;//speed setting
int Mfl=9;
int Mbr=10;
int Mbl=11;
float Speed;
void setup() {
pinMode(fr1,OUTPUT); //fr1
pinMode(fr2,OUTPUT); //fr2
pinMode(fl1,OUTPUT); //fl1
pinMode(fl2,OUTPUT); //fl2
pinMode(br1,OUTPUT); //br1
pinMode(br2,OUTPUT); //br2
pinMode(bl1,OUTPUT); //bl1
pinMode(bl2,OUTPUT); //bl2
Serial.begin(9600);
}
void loop() {
if(Serial.available()){
t = Serial.read();
Serial.println(t);
}
if(t == 'F'){
digitalWrite(fr1, LOW);
digitalWrite(fr2, HIGH);
digitalWrite(fl1, LOW);
digitalWrite(fl2, HIGH);
digitalWrite(br1, LOW);
digitalWrite(br2, HIGH);
digitalWrite(bl1, LOW);
digitalWrite(bl2, HIGH);
}
else if(t == 'B'){
digitalWrite(fr1, HIGH);
digitalWrite(fr2, LOW);
digitalWrite(fl1, HIGH);
digitalWrite(fl2, LOW);
digitalWrite(br1, HIGH);
digitalWrite(br2, LOW);
digitalWrite(bl1, HIGH);
digitalWrite(bl2, LOW);
}
else if(t == 'L'){
digitalWrite(fr1, LOW);
digitalWrite(fr2, HIGH);
digitalWrite(fl1, HIGH);
digitalWrite(fl2, LOW);
digitalWrite(br1, HIGH);
digitalWrite(br2, LOW);
digitalWrite(bl1, LOW);
digitalWrite(bl2, HIGH);
}
else if(t == 'R'){
digitalWrite(fr1, HIGH);
digitalWrite(fr2, LOW);
digitalWrite(fl1, LOW);
digitalWrite(fl2, HIGH);
digitalWrite(br1, LOW);
digitalWrite(br2, HIGH);
digitalWrite(bl1, HIGH);
digitalWrite(bl2, LOW);
}
else if(t == 'S'){ //STOP (all motors stop)
digitalWrite(fr1, LOW);
digitalWrite(fr2, LOW);
digitalWrite(fl1, LOW);
digitalWrite(fl2, LOW);
digitalWrite(br1, LOW);
digitalWrite(br2, LOW);
digitalWrite(bl1, LOW);
digitalWrite(bl2, LOW);
}
}
