Bluetooth controlled servo

Projects Programming
1

Hi, we don't have any experience programming and need to program an adruino uno with an hc-06 bluetooth transmitter to control a servo. It is a 180 degree servo and we need it go to 0 degrees or 180 degrees based on an on/off input from the bluetooth on a mac computer. Here's what we have so far:

#include <Servo.h>

Servo iservo;

int pos = 0;

void setup ()
{
iservo.attach(9);
}

void loop()
{

if (switch == 1)
{
iservo.write(pos=0);
}
else
{
iservo.write(pos=128);
}

}

We are uncertain as to what code to use to communicate with the board through bluetooth. Any help is much appreciated. Thanks

2

Here is our setup. From bluetooth to board: power is 5v, gnd is gnd, tx is to rx 0, and rx is to tx 1. The servo is connected to the 5V, gnd, and pin 9.

Photo Nov 24, 7 35 04 PM.jpg
Photo Nov 24, 7 35 04 PM.jpg2448×2448 1.05 MB

3

I know nothing about bluetooth, but surely there's enough sample code around to get you started with sending a "code" to the Arduino through BT?

Then I'm sure that "code" would be a variable, just as you have it called "switch"?

But right now your code won't compile since the variable "switch" isn't defined at the top of the sketch.

If I were you, I'd declare a variable called "switch" and put an actual switch (or just a piece of wire) on a pin. Then read that pin into the variable "switch".

This example shows how to read a switch; they read it into a variable called "buttonState".

Get that sorted, then look at the BT side of things, that's my advice.

4

Ah btw, I can't get a compile using the variable name "switch" even if I declare it, since it's a word used elsewhere in Arduinoland. So I used "switch1", that compiles.

#include <Servo.h>

Servo iservo;

byte switch1; //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

int pos = 0;

void setup ()
{
  iservo.attach(9);
}

void loop()
{


if (switch1 == 1)  //<<<<<<<<<<<<<<<<<<<<<
   {
   iservo.write(pos=0);
   }
   else
   {
        iservo.write(pos=128);
   }

  }