Simple FSM example with HC-06

A finite state machine example using bluetooth module

Mar 5, 2020

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bluetooth

hc-06

led

Devices & Components

Arduino Uno Rev3

Breadboard (generic)

LED (generic)

Resistor 1k ohm

HC-06 Bluetooth Module

Jumper wires (generic)

Software & Tools

MIT App Inventor 2

Project description

Code

FSM with HC-06

c_cpp

1#include <SoftwareSerial.h>
2
3SoftwareSerial BTserial(13, 12); //   RX | TX
4
5#define BLUE 2
6#define GREEN 4
7#define RED 7
8
9int command;
10
11void   setup() {
12  BTserial.begin(9600);
13  pinMode(GREEN,OUTPUT);
14  pinMode(RED,OUTPUT);
15   pinMode(BLUE,OUTPUT);
16  digitalWrite(RED,HIGH);  
17}
18
19void loop() {
20
21     while(BTserial.available()){
22      command=BTserial.read();
23      switch(command){
24         case 82:  //ASCII code for R
25          digitalWrite(RED,HIGH);
26          digitalWrite(GREEN,LOW);
27           digitalWrite(BLUE,LOW);
28          break;
29          
30        case   71:  //ASCII code for G
31          digitalWrite(RED,LOW);
32          digitalWrite(GREEN,HIGH);
33           digitalWrite(BLUE,LOW);
34          break;
35
36        case 66:  //ASCII   code for B
37            digitalWrite(RED,LOW);
38            digitalWrite(GREEN,LOW);
39             digitalWrite(BLUE,HIGH);
40            break;
41
42        default:
43            //Nothing happens    
44        }         
45        delay(100); 
46     }
47}
48

#include <SoftwareSerial.h>

SoftwareSerial BTserial(13, 12); //   RX | TX

#define BLUE 2
#define GREEN 4
#define RED 7

int command;

void   setup() {
  BTserial.begin(9600);
  pinMode(GREEN,OUTPUT);
  pinMode(RED,OUTPUT);
   pinMode(BLUE,OUTPUT);
  digitalWrite(RED,HIGH);  
}

void loop() {

     while(BTserial.available()){
      command=BTserial.read();
      switch(command){
         case 82:  //ASCII code for R
          digitalWrite(RED,HIGH);
          digitalWrite(GREEN,LOW);
           digitalWrite(BLUE,LOW);
          break;
          
        case   71:  //ASCII code for G
          digitalWrite(RED,LOW);
          digitalWrite(GREEN,HIGH);
           digitalWrite(BLUE,LOW);
          break;

        case 66:  //ASCII   code for B
            digitalWrite(RED,LOW);
            digitalWrite(GREEN,LOW);
             digitalWrite(BLUE,HIGH);
            break;

        default:
            //Nothing happens    
        }         
        delay(100); 
     }
}

FSM with HC-06

c_cpp

1#include <SoftwareSerial.h>
2
3SoftwareSerial BTserial(13, 12); //  RX | TX
4
5#define BLUE 2
6#define GREEN 4
7#define RED 7
8
9int command;
10
11void  setup() {
12  BTserial.begin(9600);
13  pinMode(GREEN,OUTPUT);
14  pinMode(RED,OUTPUT);
15  pinMode(BLUE,OUTPUT);
16  digitalWrite(RED,HIGH);  
17}
18
19void loop() {
20
21    while(BTserial.available()){
22      command=BTserial.read();
23      switch(command){
24        case 82:  //ASCII code for R
25          digitalWrite(RED,HIGH);
26          digitalWrite(GREEN,LOW);
27          digitalWrite(BLUE,LOW);
28          break;
29          
30        case  71:  //ASCII code for G
31          digitalWrite(RED,LOW);
32          digitalWrite(GREEN,HIGH);
33          digitalWrite(BLUE,LOW);
34          break;
35
36        case 66:  //ASCII  code for B
37            digitalWrite(RED,LOW);
38            digitalWrite(GREEN,LOW);
39            digitalWrite(BLUE,HIGH);
40            break;
41
42        default:
43           //Nothing happens    
44        }         
45        delay(100); 
46    }
47}
48

#include <SoftwareSerial.h>

SoftwareSerial BTserial(13, 12); //  RX | TX

#define BLUE 2
#define GREEN 4
#define RED 7

int command;

void  setup() {
  BTserial.begin(9600);
  pinMode(GREEN,OUTPUT);
  pinMode(RED,OUTPUT);
  pinMode(BLUE,OUTPUT);
  digitalWrite(RED,HIGH);  
}

void loop() {

    while(BTserial.available()){
      command=BTserial.read();
      switch(command){
        case 82:  //ASCII code for R
          digitalWrite(RED,HIGH);
          digitalWrite(GREEN,LOW);
          digitalWrite(BLUE,LOW);
          break;
          
        case  71:  //ASCII code for G
          digitalWrite(RED,LOW);
          digitalWrite(GREEN,HIGH);
          digitalWrite(BLUE,LOW);
          break;

        case 66:  //ASCII  code for B
            digitalWrite(RED,LOW);
            digitalWrite(GREEN,LOW);
            digitalWrite(BLUE,HIGH);
            break;

        default:
           //Nothing happens    
        }         
        delay(100); 
    }
}

Downloadable files

Whole circuit

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