Hi I wrote a program. I am using bluetooth module. Relay module and motor. I am making a car.
Everything okay when its working with usb. But when I am working arduino with battery. Arduino resets itself.
Arduino external power and motor external power different.
I try with 6 v 9v and 12 volt battery.
Thanks
#include
#include <SoftwareSerial.h>// import the serial library
SoftwareSerial Seo(10, 11); // RX, TX
int ledpin=13;
int back=1;
int forward=2;
int right=4;
int left=5;
int BluetoothData;
void setup() {
// put your setup code here, to run once:
Seo.begin(9600);
pinMode(ledpin,OUTPUT);
pinMode(back,OUTPUT); //in 1 in circuit draw
pinMode(forward,OUTPUT); //in 2 in circuit draw
pinMode(right,OUTPUT); //in 3 in circuit draw
pinMode(left,OUTPUT); //in 4 in circuit draw
}
void loop() {
// put your main code here, to run repeatedly:
if (Seo.available()){
int BluetoothData=Seo.read();
if(BluetoothData==‘1’){ //car going forward
digitalWrite(back,1);
digitalWrite(forward,0);
digitalWrite(right,1);
digitalWrite(left,1);
}
if(BluetoothData==‘2’){ // Car going back.
digitalWrite(back,0);
digitalWrite(forward,1);
digitalWrite(right,1);
digitalWrite(left,1);
}
if(BluetoothData==‘3’){ //car going forward right
digitalWrite(back,1);
digitalWrite(forward,0);
digitalWrite(right,0);
digitalWrite(left,1);
}
if(BluetoothData==‘4’){ // car going forward left
digitalWrite(back,1);
digitalWrite(forward,0);
digitalWrite(right,1);
digitalWrite(left,0);
}
if(BluetoothData==‘5’){ //back right
digitalWrite(back,0);
digitalWrite(forward,1);
digitalWrite(right,0);
digitalWrite(left,1);
}
if(BluetoothData==‘6’){ // back left
digitalWrite(back,0);
digitalWrite(forward,1);
digitalWrite(right,1);
digitalWrite(left,0);
}
if(BluetoothData==‘7’){ //blink
digitalWrite(ledpin,1);
delay(500);
digitalWrite(ledpin,0);
delay(500);
digitalWrite(ledpin,1);
delay(500);
digitalWrite(ledpin,0);
delay(500);
}
if(BluetoothData==‘0’){ //stop everything
digitalWrite(back,1);
digitalWrite(forward,1);
digitalWrite(right,1);
digitalWrite(left,1);
}
}
delay(100);// prepare for next data …
}
This is my code.
have a problem. I am using hc 06 bluetooth module. I wrote a program in visual studio. This program very basic. it is connecting bluetooth module and sending 1 2 3 4 5 6 7 0
My arduino getting this data. When I send this. first sending working but second sending isnt working. sometimes working sometimes not working. Arduino resetting itself. Or working not normally.
This is my circuit. I added attachment. And I am using an relay module. I added them.
When I send data “1” my car is going forward when I send “2” my car is backward etc.
In circuit draw. I showed relay module connection. 5 V GND in1 in2 in3 in4 using for relay module.
I used (4*1,5Volt AA Battery) for leonardo.
I used 3,7 volt for motors. I attached relay connection image I use for motor turning. I have relay module with 4 relay
This is my code.
Which pin is 0 ? this motor is running. When back pin is 0 motor turning back.
I don’t know if this helps
I don’t know if this helps but two things I’m thinking are…
1. have you got common ground supplies. The gnds from both power sources should be joined.
2. I had trouble with win7 refusing to maintain an open connection with the HC06. It seemed to timeout when the connection was idle for any length of time. This is a common issue I believe and some have solved it with installing new drivers from toshiba but I had no success. To get around it I just kept sending a bit of junk data to maintain the connection.
Make sure that the
Make sure that the -(negative) terminal of both batteries are connected together so you have a common ground would be my first suggestion.
Do you
have all the grounds tied together?
Ground???
In 6 minutes you have 3 seperate suggestion of checking for a common ground, so i think consensus is to check that first 
