Controlling Arduino State Machine via Web

This video shows how to change state of state machine on Arduino via web.

Feb 28, 2017

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6843 views

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6 respects

remote control

web

Components and supplies

USB Cable 2.0 Type A/B for Arduino Uno

7V LED By KINGBRIGHT

Breadboard

PHPoC Shield for Arduino

Arduino UNO

RELAY click

Jumper wires (generic)

Breadboard (generic)

Jumper Wires

Project description

Code

Normal code for controlling LED via webpage

arduino

1/* arduino web server - remote control (push button) */
2
3#include   "SPI.h"
4#include "Phpoc.h"
5
6#define STATE_YELLOW	'A'
7#define STATE_GREEN		'B'
8#define   STATE_RED		'C'
9
10#define PIN_LED_YELLOW 		3
11#define PIN_LED_GREEN 		8
12#define   PIN_LED_RED			9
13
14PhpocServer server(80);
15
16char current_led = STATE_RED;
17int   pins[3] = {PIN_LED_YELLOW, PIN_LED_GREEN, PIN_LED_RED};
18
19void handleEvent(char   stt);
20
21void setup(){
22	Serial.begin(9600);
23	while(!Serial)
24		;
25
26	Phpoc.begin(PF_LOG_SPI   | PF_LOG_NET);
27	//Phpoc.begin();
28
29	server.beginWebSocket("remote_push");
30
31	Serial.print("WebSocket   server address : ");
32	Serial.println(Phpoc.localIP());  
33	
34	pinMode(PIN_LED_YELLOW,   OUTPUT);
35	pinMode(PIN_LED_GREEN, OUTPUT);
36	pinMode(PIN_LED_RED, OUTPUT);
37	
38	digitalWrite(PIN_LED_RED,   HIGH);
39	
40}
41
42void loop() {
43	//Wait for a new client:
44	PhpocClient   client = server.available();
45
46	if (client) {
47		if (client.available()   > 0) {
48			//Read the bytes incoming from the client:
49			char event =   client.read();
50			if(event == 'A' || event == 'B' || event == 'C')
51				if(event   != current_led)
52					handleEvent(event);
53		}
54	}
55}
56
57void   handleEvent(char event){
58	
59	for(int i = 0; i < 5; i++){
60		digitalWrite(pins[current_led   - 'A'], (i%2));
61		delay(100);
62	}
63	//Turn on green led
64	digitalWrite(pins[event   - 'A'], HIGH);
65	
66	// update current state
67	current_led = event;
68}

/* arduino web server - remote control (push button) */

#include   "SPI.h"
#include "Phpoc.h"

#define STATE_YELLOW	'A'
#define STATE_GREEN		'B'
#define   STATE_RED		'C'

#define PIN_LED_YELLOW 		3
#define PIN_LED_GREEN 		8
#define   PIN_LED_RED			9

PhpocServer server(80);

char current_led = STATE_RED;
int   pins[3] = {PIN_LED_YELLOW, PIN_LED_GREEN, PIN_LED_RED};

void handleEvent(char   stt);

void setup(){
	Serial.begin(9600);
	while(!Serial)
		;

	Phpoc.begin(PF_LOG_SPI   | PF_LOG_NET);
	//Phpoc.begin();

	server.beginWebSocket("remote_push");

	Serial.print("WebSocket   server address : ");
	Serial.println(Phpoc.localIP());  
	
	pinMode(PIN_LED_YELLOW,   OUTPUT);
	pinMode(PIN_LED_GREEN, OUTPUT);
	pinMode(PIN_LED_RED, OUTPUT);
	
	digitalWrite(PIN_LED_RED,   HIGH);
	
}

void loop() {
	//Wait for a new client:
	PhpocClient   client = server.available();

	if (client) {
		if (client.available()   > 0) {
			//Read the bytes incoming from the client:
			char event =   client.read();
			if(event == 'A' || event == 'B' || event == 'C')
				if(event   != current_led)
					handleEvent(event);
		}
	}
}

void   handleEvent(char event){
	
	for(int i = 0; i < 5; i++){
		digitalWrite(pins[current_led   - 'A'], (i%2));
		delay(100);
	}
	//Turn on green led
	digitalWrite(pins[event   - 'A'], HIGH);
	
	// update current state
	current_led = event;
}

Finite State Machine Code for controlling LED via webpage

arduino

This code have the same functionality as normal code but using Finite State Machine model

1/* arduino web server - remote control (push button) */
2
3#include
4  "SPI.h"
5#include "Phpoc.h"
6
7#define STATE_YELLOW	'A'
8#define STATE_GREEN		'B'
9#define
10  STATE_RED		'C'
11
12#define PIN_LED_YELLOW 		3
13#define PIN_LED_GREEN 		8
14#define
15  PIN_LED_RED			9
16
17PhpocServer server(80);
18
19char fsm_state = STATE_RED;
20
21void
22  FSMEvent(char stt);
23
24void setup(){
25	Serial.begin(9600);
26	while(!Serial)
27		;
28
29	Phpoc.begin(PF_LOG_SPI
30  | PF_LOG_NET);
31	//Phpoc.begin();
32
33	server.beginWebSocket("remote_push");
34
35	Serial.print("WebSocket
36  server address : ");
37	Serial.println(Phpoc.localIP());  
38	
39	pinMode(PIN_LED_YELLOW,
40  OUTPUT);
41	pinMode(PIN_LED_GREEN, OUTPUT);
42	pinMode(PIN_LED_RED, OUTPUT);
43	
44	digitalWrite(PIN_LED_RED,
45  HIGH);
46}
47
48void loop() {
49	//Wait for a new client:
50	PhpocClient
51  client = server.available();
52
53	if (client) {
54		if (client.available()
55  > 0) {
56			//Read the bytes incoming from the client:
57			char event =
58  client.read();
59			if(event == 'A' || event == 'B' || event == 'C')
60				if(event
61  != fsm_state)
62					FSMEvent(event);
63		}
64	}
65}
66
67void FSMEvent(char
68  event){
69	
70	//Action is taken based on current state and event
71	switch(fsm_state){
72		case
73  STATE_YELLOW:
74			
75			if(event == STATE_GREEN){
76				//Blink yellow
77  led in a second and then turn off
78				for(int i = 0; i < 5; i++){
79					digitalWrite(PIN_LED_YELLOW,
80  (i%2));
81					delay(100);
82				}
83				//Turn on green led
84				digitalWrite(PIN_LED_GREEN,
85  HIGH);
86			}
87			else if(event == STATE_RED){
88				//Blink yellow
89  led in a second and then turn off
90				for(int i = 0; i < 5; i++){
91					digitalWrite(PIN_LED_YELLOW,
92  (i%2));
93					delay(100);
94				}
95				//Turn on red led
96				digitalWrite(PIN_LED_RED,
97  HIGH);
98			}
99			
100			break;
101			
102		case STATE_GREEN:
103			
104			if(event
105  == STATE_YELLOW){
106				//Blink green led in a second and then turn off
107				for(int
108  i = 0; i < 5; i++){
109					digitalWrite(PIN_LED_GREEN, (i%2));
110					delay(100);
111				}
112				//Turn
113  on yellow led
114				digitalWrite(PIN_LED_YELLOW, HIGH);
115			}
116			else
117  if(event == STATE_RED){
118				//Blink green led in a second and then turn off
119				for(int
120  i = 0; i < 5; i++){
121					digitalWrite(PIN_LED_GREEN, (i%2));
122					delay(100);
123				}
124				//Turn
125  on red led
126				digitalWrite(PIN_LED_RED, HIGH);
127			}
128			
129			break;
130			
131		case
132  STATE_RED:
133			
134			if(event == STATE_YELLOW){
135				//Blink red
136  led in a second and then turn off
137				for(int i = 0; i < 5; i++){
138					digitalWrite(PIN_LED_RED,
139  (i%2));
140					delay(100);
141				}
142				//Turn on yellow led
143				digitalWrite(PIN_LED_YELLOW,
144  HIGH);
145			}
146			else if(event == STATE_GREEN){
147				//Blink red
148  led in a second and then turn off
149				for(int i = 0; i < 5; i++){
150					digitalWrite(PIN_LED_RED,
151  (i%2));
152					delay(100);
153				}
154				//Turn on green led
155				digitalWrite(PIN_LED_GREEN,
156  HIGH);
157			}
158			
159			break;
160	}
161	
162	// update current
163  state
164	fsm_state = event;
165}

/* arduino web server - remote control (push button) */

#include
  "SPI.h"
#include "Phpoc.h"

#define STATE_YELLOW	'A'
#define STATE_GREEN		'B'
#define
  STATE_RED		'C'

#define PIN_LED_YELLOW 		3
#define PIN_LED_GREEN 		8
#define
  PIN_LED_RED			9

PhpocServer server(80);

char fsm_state = STATE_RED;

void
  FSMEvent(char stt);

void setup(){
	Serial.begin(9600);
	while(!Serial)
		;

	Phpoc.begin(PF_LOG_SPI
  | PF_LOG_NET);
	//Phpoc.begin();

	server.beginWebSocket("remote_push");

	Serial.print("WebSocket
  server address : ");
	Serial.println(Phpoc.localIP());  
	
	pinMode(PIN_LED_YELLOW,
  OUTPUT);
	pinMode(PIN_LED_GREEN, OUTPUT);
	pinMode(PIN_LED_RED, OUTPUT);
	
	digitalWrite(PIN_LED_RED,
  HIGH);
}

void loop() {
	//Wait for a new client:
	PhpocClient
  client = server.available();

	if (client) {
		if (client.available()
  > 0) {
			//Read the bytes incoming from the client:
			char event =
  client.read();
			if(event == 'A' || event == 'B' || event == 'C')
				if(event
  != fsm_state)
					FSMEvent(event);
		}
	}
}

void FSMEvent(char
  event){
	
	//Action is taken based on current state and event
	switch(fsm_state){
		case
  STATE_YELLOW:
			
			if(event == STATE_GREEN){
				//Blink yellow
  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_YELLOW,
  (i%2));
					delay(100);
				}
				//Turn on green led
				digitalWrite(PIN_LED_GREEN,
  HIGH);
			}
			else if(event == STATE_RED){
				//Blink yellow
  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_YELLOW,
  (i%2));
					delay(100);
				}
				//Turn on red led
				digitalWrite(PIN_LED_RED,
  HIGH);
			}
			
			break;
			
		case STATE_GREEN:
			
			if(event
  == STATE_YELLOW){
				//Blink green led in a second and then turn off
				for(int
  i = 0; i < 5; i++){
					digitalWrite(PIN_LED_GREEN, (i%2));
					delay(100);
				}
				//Turn
  on yellow led
				digitalWrite(PIN_LED_YELLOW, HIGH);
			}
			else
  if(event == STATE_RED){
				//Blink green led in a second and then turn off
				for(int
  i = 0; i < 5; i++){
					digitalWrite(PIN_LED_GREEN, (i%2));
					delay(100);
				}
				//Turn
  on red led
				digitalWrite(PIN_LED_RED, HIGH);
			}
			
			break;
			
		case
  STATE_RED:
			
			if(event == STATE_YELLOW){
				//Blink red
  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_RED,
  (i%2));
					delay(100);
				}
				//Turn on yellow led
				digitalWrite(PIN_LED_YELLOW,
  HIGH);
			}
			else if(event == STATE_GREEN){
				//Blink red
  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_RED,
  (i%2));
					delay(100);
				}
				//Turn on green led
				digitalWrite(PIN_LED_GREEN,
  HIGH);
			}
			
			break;
	}
	
	// update current
  state
	fsm_state = event;
}

Finite State Machine Code for controlling LED via webpage

arduino

This code have the same functionality as normal code but using Finite State Machine model

1/* arduino web server - remote control (push button) */
2
3#include  "SPI.h"
4#include "Phpoc.h"
5
6#define STATE_YELLOW	'A'
7#define STATE_GREEN		'B'
8#define  STATE_RED		'C'
9
10#define PIN_LED_YELLOW 		3
11#define PIN_LED_GREEN 		8
12#define  PIN_LED_RED			9
13
14PhpocServer server(80);
15
16char fsm_state = STATE_RED;
17
18void  FSMEvent(char stt);
19
20void setup(){
21	Serial.begin(9600);
22	while(!Serial)
23		;
24
25	Phpoc.begin(PF_LOG_SPI  | PF_LOG_NET);
26	//Phpoc.begin();
27
28	server.beginWebSocket("remote_push");
29
30	Serial.print("WebSocket  server address : ");
31	Serial.println(Phpoc.localIP());  
32	
33	pinMode(PIN_LED_YELLOW,  OUTPUT);
34	pinMode(PIN_LED_GREEN, OUTPUT);
35	pinMode(PIN_LED_RED, OUTPUT);
36	
37	digitalWrite(PIN_LED_RED,  HIGH);
38}
39
40void loop() {
41	//Wait for a new client:
42	PhpocClient  client = server.available();
43
44	if (client) {
45		if (client.available()  > 0) {
46			//Read the bytes incoming from the client:
47			char event =  client.read();
48			if(event == 'A' || event == 'B' || event == 'C')
49				if(event  != fsm_state)
50					FSMEvent(event);
51		}
52	}
53}
54
55void FSMEvent(char  event){
56	
57	//Action is taken based on current state and event
58	switch(fsm_state){
59		case  STATE_YELLOW:
60			
61			if(event == STATE_GREEN){
62				//Blink yellow  led in a second and then turn off
63				for(int i = 0; i < 5; i++){
64					digitalWrite(PIN_LED_YELLOW,  (i%2));
65					delay(100);
66				}
67				//Turn on green led
68				digitalWrite(PIN_LED_GREEN,  HIGH);
69			}
70			else if(event == STATE_RED){
71				//Blink yellow  led in a second and then turn off
72				for(int i = 0; i < 5; i++){
73					digitalWrite(PIN_LED_YELLOW,  (i%2));
74					delay(100);
75				}
76				//Turn on red led
77				digitalWrite(PIN_LED_RED,  HIGH);
78			}
79			
80			break;
81			
82		case STATE_GREEN:
83			
84			if(event  == STATE_YELLOW){
85				//Blink green led in a second and then turn off
86				for(int  i = 0; i < 5; i++){
87					digitalWrite(PIN_LED_GREEN, (i%2));
88					delay(100);
89				}
90				//Turn  on yellow led
91				digitalWrite(PIN_LED_YELLOW, HIGH);
92			}
93			else  if(event == STATE_RED){
94				//Blink green led in a second and then turn off
95				for(int  i = 0; i < 5; i++){
96					digitalWrite(PIN_LED_GREEN, (i%2));
97					delay(100);
98				}
99				//Turn  on red led
100				digitalWrite(PIN_LED_RED, HIGH);
101			}
102			
103			break;
104			
105		case  STATE_RED:
106			
107			if(event == STATE_YELLOW){
108				//Blink red  led in a second and then turn off
109				for(int i = 0; i < 5; i++){
110					digitalWrite(PIN_LED_RED,  (i%2));
111					delay(100);
112				}
113				//Turn on yellow led
114				digitalWrite(PIN_LED_YELLOW,  HIGH);
115			}
116			else if(event == STATE_GREEN){
117				//Blink red  led in a second and then turn off
118				for(int i = 0; i < 5; i++){
119					digitalWrite(PIN_LED_RED,  (i%2));
120					delay(100);
121				}
122				//Turn on green led
123				digitalWrite(PIN_LED_GREEN,  HIGH);
124			}
125			
126			break;
127	}
128	
129	// update current  state
130	fsm_state = event;
131}

/* arduino web server - remote control (push button) */

#include  "SPI.h"
#include "Phpoc.h"

#define STATE_YELLOW	'A'
#define STATE_GREEN		'B'
#define  STATE_RED		'C'

#define PIN_LED_YELLOW 		3
#define PIN_LED_GREEN 		8
#define  PIN_LED_RED			9

PhpocServer server(80);

char fsm_state = STATE_RED;

void  FSMEvent(char stt);

void setup(){
	Serial.begin(9600);
	while(!Serial)
		;

	Phpoc.begin(PF_LOG_SPI  | PF_LOG_NET);
	//Phpoc.begin();

	server.beginWebSocket("remote_push");

	Serial.print("WebSocket  server address : ");
	Serial.println(Phpoc.localIP());  
	
	pinMode(PIN_LED_YELLOW,  OUTPUT);
	pinMode(PIN_LED_GREEN, OUTPUT);
	pinMode(PIN_LED_RED, OUTPUT);
	
	digitalWrite(PIN_LED_RED,  HIGH);
}

void loop() {
	//Wait for a new client:
	PhpocClient  client = server.available();

	if (client) {
		if (client.available()  > 0) {
			//Read the bytes incoming from the client:
			char event =  client.read();
			if(event == 'A' || event == 'B' || event == 'C')
				if(event  != fsm_state)
					FSMEvent(event);
		}
	}
}

void FSMEvent(char  event){
	
	//Action is taken based on current state and event
	switch(fsm_state){
		case  STATE_YELLOW:
			
			if(event == STATE_GREEN){
				//Blink yellow  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_YELLOW,  (i%2));
					delay(100);
				}
				//Turn on green led
				digitalWrite(PIN_LED_GREEN,  HIGH);
			}
			else if(event == STATE_RED){
				//Blink yellow  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_YELLOW,  (i%2));
					delay(100);
				}
				//Turn on red led
				digitalWrite(PIN_LED_RED,  HIGH);
			}
			
			break;
			
		case STATE_GREEN:
			
			if(event  == STATE_YELLOW){
				//Blink green led in a second and then turn off
				for(int  i = 0; i < 5; i++){
					digitalWrite(PIN_LED_GREEN, (i%2));
					delay(100);
				}
				//Turn  on yellow led
				digitalWrite(PIN_LED_YELLOW, HIGH);
			}
			else  if(event == STATE_RED){
				//Blink green led in a second and then turn off
				for(int  i = 0; i < 5; i++){
					digitalWrite(PIN_LED_GREEN, (i%2));
					delay(100);
				}
				//Turn  on red led
				digitalWrite(PIN_LED_RED, HIGH);
			}
			
			break;
			
		case  STATE_RED:
			
			if(event == STATE_YELLOW){
				//Blink red  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_RED,  (i%2));
					delay(100);
				}
				//Turn on yellow led
				digitalWrite(PIN_LED_YELLOW,  HIGH);
			}
			else if(event == STATE_GREEN){
				//Blink red  led in a second and then turn off
				for(int i = 0; i < 5; i++){
					digitalWrite(PIN_LED_RED,  (i%2));
					delay(100);
				}
				//Turn on green led
				digitalWrite(PIN_LED_GREEN,  HIGH);
			}
			
			break;
	}
	
	// update current  state
	fsm_state = event;
}

Normal code for controlling LED via webpage

arduino

1/* arduino web server - remote control (push button) */
2
3#include  "SPI.h"
4#include "Phpoc.h"
5
6#define STATE_YELLOW	'A'
7#define STATE_GREEN		'B'
8#define  STATE_RED		'C'
9
10#define PIN_LED_YELLOW 		3
11#define PIN_LED_GREEN 		8
12#define  PIN_LED_RED			9
13
14PhpocServer server(80);
15
16char current_led = STATE_RED;
17int  pins[3] = {PIN_LED_YELLOW, PIN_LED_GREEN, PIN_LED_RED};
18
19void handleEvent(char  stt);
20
21void setup(){
22	Serial.begin(9600);
23	while(!Serial)
24		;
25
26	Phpoc.begin(PF_LOG_SPI  | PF_LOG_NET);
27	//Phpoc.begin();
28
29	server.beginWebSocket("remote_push");
30
31	Serial.print("WebSocket  server address : ");
32	Serial.println(Phpoc.localIP());  
33	
34	pinMode(PIN_LED_YELLOW,  OUTPUT);
35	pinMode(PIN_LED_GREEN, OUTPUT);
36	pinMode(PIN_LED_RED, OUTPUT);
37	
38	digitalWrite(PIN_LED_RED,  HIGH);
39	
40}
41
42void loop() {
43	//Wait for a new client:
44	PhpocClient  client = server.available();
45
46	if (client) {
47		if (client.available()  > 0) {
48			//Read the bytes incoming from the client:
49			char event =  client.read();
50			if(event == 'A' || event == 'B' || event == 'C')
51				if(event  != current_led)
52					handleEvent(event);
53		}
54	}
55}
56
57void  handleEvent(char event){
58	
59	for(int i = 0; i < 5; i++){
60		digitalWrite(pins[current_led  - 'A'], (i%2));
61		delay(100);
62	}
63	//Turn on green led
64	digitalWrite(pins[event  - 'A'], HIGH);
65	
66	// update current state
67	current_led = event;
68}

/* arduino web server - remote control (push button) */

#include  "SPI.h"
#include "Phpoc.h"

#define STATE_YELLOW	'A'
#define STATE_GREEN		'B'
#define  STATE_RED		'C'

#define PIN_LED_YELLOW 		3
#define PIN_LED_GREEN 		8
#define  PIN_LED_RED			9

PhpocServer server(80);

char current_led = STATE_RED;
int  pins[3] = {PIN_LED_YELLOW, PIN_LED_GREEN, PIN_LED_RED};

void handleEvent(char  stt);

void setup(){
	Serial.begin(9600);
	while(!Serial)
		;

	Phpoc.begin(PF_LOG_SPI  | PF_LOG_NET);
	//Phpoc.begin();

	server.beginWebSocket("remote_push");

	Serial.print("WebSocket  server address : ");
	Serial.println(Phpoc.localIP());  
	
	pinMode(PIN_LED_YELLOW,  OUTPUT);
	pinMode(PIN_LED_GREEN, OUTPUT);
	pinMode(PIN_LED_RED, OUTPUT);
	
	digitalWrite(PIN_LED_RED,  HIGH);
	
}

void loop() {
	//Wait for a new client:
	PhpocClient  client = server.available();

	if (client) {
		if (client.available()  > 0) {
			//Read the bytes incoming from the client:
			char event =  client.read();
			if(event == 'A' || event == 'B' || event == 'C')
				if(event  != current_led)
					handleEvent(event);
		}
	}
}

void  handleEvent(char event){
	
	for(int i = 0; i < 5; i++){
		digitalWrite(pins[current_led  - 'A'], (i%2));
		delay(100);
	}
	//Turn on green led
	digitalWrite(pins[event  - 'A'], HIGH);
	
	// update current state
	current_led = event;
}

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