Hey guys i'm making a rc boat. it is using 2 motors for thrust and a sevo to control a rudder to steer. the servo is controlled using a joystick pot. im using a l293d to control the motors since they both run on 9v each. the wireless transmission is done via rf modules. im using 2 arduino uno's. this is my first arduino projects so i am not very familiar with the arduino ide. can you guys help me with the code.Thnx in advance.
can you guys help me with the code.
Here's a start:
// Add some stuff here
void setup()
{
// Add some stuff here
}
void loop()
{
// Add some stuff here
}
When you understand what you want to do, just follow the comments.
i need help with the "add some stuff here".
PaulS:
Here's a start:// Add some stuff here
void setup()
{
// Add some stuff here
}
void loop()
{
// Add some stuff here
}
When you understand what you want to do, just follow the comments.
Times two, since he's using two arduinos!
suersaiyangod:
Hey guys i'm making a rc boat. it is using 2 motors for thrust and a sevo to control a rudder to steer. the servo is controlled using a joystick pot. im using a l293d to control the motors since they both run on 9v each. the wireless transmission is done via rf modules. im using 2 arduino uno's. this is my first arduino projects so i am not very familiar with the arduino ide. can you guys help me with the code.Thnx in advance.
Perhaps start at ... the beginning? Can you program? Did you understand the blink sketch? Have you tried reading buttons? Do you know how to make functions()? Classes?
There's so much to learn, and have fun doing it. 
Starting with a way-too-advanced project relative to skills, just results in confusion and demotivation.
As I said before, this is a resource group, not a manufacturing team. Please consider that I'm not offended, nor angry or upset. Just trying to urge you to do something that you can learn from, and not something that leaves you clueless. Ok?
Oh, and if you are in fact not clueless as to how to do this, you may ask questions about whether your reasoning and implementation ideas are sound.
i need help with the "add some stuff here".
Send me your address, and your credit card number. I'll book a flight and be right there.
I'll whack with a clue by four until you understand that coding is about the last thing that you do.
You write code to implement requirements. You do not write a thing until you understand the requirements that have been provided by the customer.
Since you are the customer, and you haven't provided any requirements, there is no coding to do yet.
suersaiyangod:
Hey guys i'm making a rc boat. it is using 2 motors for thrust and a sevo to control a rudder to steer. the servo is controlled using a joystick pot. im using a l293d to control the motors since they both run on 9v each. the wireless transmission is done via rf modules. im using 2 arduino uno's. this is my first arduino projects so i am not very familiar with the arduino ide. can you guys help me with the code.Thnx in advance.
It sounds from this as if you have some part of the program working. If so please post the code and explain what extra stuff you are having trouble with.
What RF modules are you using?
...R
Hi,
What RF modules do you have?
Tom...
Hey guys i found this code from a website:
//Define the input pins for the joystick and the variables to keep track of its state
int vertical = A0,horizontal = A1,vVal,hVal,vZero,hZero;
void setup()
{//Here we set up everyting....
Serial.begin(4800);
//Set the initial "zero" vertical position value of the joystick
vZero = map(analogRead(vertical),0,1023,0,255);
//Set the initial "zero" horizontal position value of the joystick
hZero = map(analogRead(horizontal),0,1023,0,255);
}
void loop()
{ //This will happen over and over and over and over again......
//Read the vertical pot value
vVal = map(analogRead(vertical),0,1023,0,255);
//Read the horizontal pot value
hVal = map(analogRead(horizontal),0,1023,0,255);
//Declare variables to store the cardinal distances from the "zero" point
//and an offset point to activate a direction
int FVal = 0,BVal = 0,RVal = 0,LVal = 0,centerOffset = 2;
//Find the distance from the ("zero" position value +/- the offset value)
//for forward and backwards
//If the joystick is pushed up passed the "zero" point + the offset value
if(vVal > (vZero + centerOffset))
{
//store the distance up from the "zero" point
FVal = vVal - vZero;
//clear any previous distance from the bottom side
BVal = 0;
}
//If the joystick is pushed down passed the "zero" point - the offset value
else if(vVal < (vZero - centerOffset))
{
//store the distance down from the "zero" point
BVal = vZero - vVal;
//clear any previous distance from the top side
FVal = 0;
}
//Find the distances from the ("zero" position value +/- the offset value)
//for left and right
//If the joystick is pushed left passed the "zero" point + the offset value
if(hVal > (hZero + centerOffset))
{
//store the distance left from the "zero" point
LVal = hVal;
//clear any previous distance from the right side
RVal = 0;
}
//If the joystick is pushed right passed the "zero" point - the offset value
else if(hVal < (hZero - centerOffset))
{
//store the distance right from the "zero" point
RVal = hZero - hVal + hZero;
//clear any previous distance from the left side
LVal = 0;
}
//Find the largest of the four and that's the direction we are going
//If the joystick is pushed furthest forward
//If the joystick is pushed furthest left
if(LVal > RVal && LVal > FVal && LVal > BVal)
{
//then send 'L' through usart
Serial.write("L");
//Show what happened in the serial monitor
Serial.println("L");
}
//If the joystick is pushed furthest right
else if(RVal > LVal && RVal > FVal && RVal > BVal)
{
//then send 'R' through usart
Serial.write("R");
//Show what happened in the serial monitor
Serial.println("R");
}
else if(FVal > LVal && FVal > RVal && FVal > BVal)
{
Serial.write("F");
Serial.println("F");
}
else if(BVal > FVal && BVal > LVal && BVal > RVal)
{
Serial.write("B");
Serial.println("B");
}
else
{
//The character U keeps continuous 0's and 1's on the serial line which
Serial.write('U');
//helps with synchronization at the receiver side
Serial.println("Not Moving");
}
}
and i changed it to this:
//Define the input pins for the joystick and the variables to keep track of its state
int horizontal = A0,hVal,hZero;
String Vala;
int Valb;
int buttonStatef = 0;
int buttonStateb = 0;
void setup()
{//Here we set up everyting....
Serial.begin(4800);
//Set the initial "zero" horizontal position value of the joystick
hZero = map(analogRead(horizontal),0,1023,0,255);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(12, INPUT);
pinMode(11, INPUT);
}
void loop()
{ //This will happen over and over and over and over again......
hVal = map(analogRead(horizontal),0,1023,0,255);
//Declare variables to store the cardinal distances from the "zero" point
//and an offset point to activate a direction
int FVal = 0,BVal = 0,RVal = 0,LVal = 0,centerOffset = 2;
buttonStatef = digitalRead(12);
buttonStateb = digitalRead(11);
if(buttonStatef == HIGH && buttonStateb == HIGH)
{
Vala = 0;
}
else if( buttonStateb == HIGH)
{
Vala = "B";
}
else if ( buttonStatef == HIGH)
{
Vala = "F";
}
else {
Vala = 0;
}
if(hVal > (hZero + centerOffset))
{
//store the distance left from the "zero" point
LVal = hVal;
//clear any previous distance from the right side
RVal = 0;
}
//If the joystick is pushed right passed the "zero" point - the offset value
else if(hVal < (hZero - centerOffset))
{
//store the distance right from the "zero" point
RVal = hZero - hVal + hZero;
//clear any previous distance from the left side
LVal = 0;
}
//Find the largest of the four and that's the direction we are going
//If the joystick is pushed furthest forward
//If the joystick is pushed furthest left
if(LVal > RVal)
{
Valb = LVal;
}
//If the joystick is pushed furthest right
else if(RVal > LVal)
{
Valb = RVal;
}
else
{
Valb = 0;
}
{
Serial.write(Valb && Vala);
Serial.println(Valb && Vala);
}
}
while compiling this code i got an error saying “ambiguous overload for ‘operator=’ (operand types are ‘String’ and ‘int’)”
i dont know what this means because string can hold both characters and numbers. i might be wrong as i have only learnt visual basics and a bit of ‘c’ before the summer holidays.
Serial.write(Valb && Vala);
Serial.println(Valb && Vala);
What's that?
AWOL:
What's that?
And why are Vala and Valb different types?
i am using 433 MGz rf modules. like this one
AWOL:
Serial.write(Valb && Vala);
Serial.println(Valb && Vala);
What's that?
it sends the values through the rf transmitter and displays them in serial monitor.
Vala telles the motor move through these keys “F” for forward, “B” for backwards and 0 (the motors dont move), since it has both characters and numbers i kept it as string and since Valb only tells the pot position which is in numbers i kept is as int
You completely misunderstand what the && does. You can NOT use it that way.
so then how can i send the value of both Vala and Valb? shud i first send Vala and then send Valb like this:
Serial.write(Valb);
Serial.write(Vala);
So i changed the code a bit and it got compiled without any errors. will it work:
//Define the input pins for the joystick and the variables to keep track of its state
int horizontal = A0,hVal,hZero;
String Vala;
int Valb;
int buttonStatef = 0;
int buttonStateb = 0;
void setup()
{//Here we set up everyting....
Serial.begin(4800);
//Set the initial "zero" horizontal position value of the joystick
hZero = map(analogRead(horizontal),0,1023,0,255);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(12, INPUT);
pinMode(11, INPUT);
}
void loop()
{ //This will happen over and over and over and over again......
hVal = map(analogRead(horizontal),0,1023,0,255);
//Declare variables to store the cardinal distances from the "zero" point
//and an offset point to activate a direction
int FVal = 0,BVal = 0,RVal = 0,LVal = 0,centerOffset = 2;
buttonStatef = digitalRead(12);
buttonStateb = digitalRead(11);
if(buttonStatef == HIGH && buttonStateb == HIGH)
{
Vala = "U";
}
else if( buttonStateb == HIGH)
{
Vala = "B";
}
else if ( buttonStatef == HIGH)
{
Vala = "F";
}
else {
Vala = "U";
}
if(hVal > (hZero + centerOffset))
{
//store the distance left from the "zero" point
LVal = hVal;
//clear any previous distance from the right side
RVal = 0;
}
//If the joystick is pushed right passed the "zero" point - the offset value
else if(hVal < (hZero - centerOffset))
{
//store the distance right from the "zero" point
RVal = hZero - hVal + hZero;
//clear any previous distance from the left side
LVal = 0;
}
//Find the largest of the four and that's the direction we are going
//If the joystick is pushed furthest forward
//If the joystick is pushed furthest left
if(LVal > RVal)
{
Valb = LVal;
}
//If the joystick is pushed furthest right
else if(RVal > LVal)
{
Valb = RVal;
}
else
{
Valb = 0;
}
{
Serial.write(Valb && Vala);
Serial.println(Valb && Vala);
}
}
suersaiyangod:
So i changed the code a bit and it got compiled without any errors. will it work:
Don't ask us. Tell us.
The only way to answer your question is to test the program.
...R
Serial.write(Valb && Vala);
Serial.println(Valb && Vala);
I'm sure I've asked this before, but I'll try again - what's that?
i dont have any clue on how to sort the information when the reciever reciers the code. can u guys give me pointers on the reciever code?thnx
suersaiyangod:
i dont have any clue on how to sort the information when the reciever reciers the code.
You have to explain much more clearly what you are having a problem with.
I get the impression you have grabbed a program from somewhere and you don’t understand how it works. And to make things even more complicated you made changes to it.
There are so many ways for a program to be wrong that it is essential to learn how it works before you do anything else. If you are making a curry you may get away with experimentally adding a bit of that or a little of the other. But you can’t do that with a program.
…R