next topic »

[on:]

Hi, I want to decode the Samsung AC IrRemote. I am using the Arduino Uno, and using arduino example IRrecvDump

Code:

#include <IRremote.h>

int RECV_PIN = 11;

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}

// Dumps out the decode_results structure.
// Call this after IRrecv::decode()
// void * to work around compiler issue
//void dump(void *v) {
//  decode_results *results = (decode_results *)v
void dump(decode_results *results) {
  int count = results->rawlen;
  if (results->decode_type == UNKNOWN) {
    Serial.print("Unknown encoding: ");
  }
  else if (results->decode_type == NEC) {
    Serial.print("Decoded NEC: ");
  }
  else if (results->decode_type == SONY) {
    Serial.print("Decoded SONY: ");
  }
  else if (results->decode_type == RC5) {
    Serial.print("Decoded RC5: ");
  }
   else if (results->decode_type == SANYO) {
    Serial.print("Decoded SANYO: ");
  }
  else if (results->decode_type == RC6) {
    Serial.print("Decoded RC6: ");
  }
  else if (results->decode_type == PANASONIC) {
    Serial.print("Decoded PANASONIC - Address: ");
    Serial.print(results->panasonicAddress,HEX);
    Serial.print(" Value: ");
  }
  else if (results->decode_type == JVC) {
     Serial.print("Decoded JVC: ");
  }
  Serial.print(results->value, HEX);
  Serial.print(" (");
  Serial.print(results->bits, DEC);
  Serial.println(" bits)");
  Serial.print("Raw (");
  Serial.print(count, DEC);
  Serial.print("): ");

  for (int i = 0; i < count; i++) {
    if ((i % 2) == 1) {
      Serial.print(results->rawbuf[i]*USECPERTICK, DEC);
    }
    else {
      Serial.print(-(int)results->rawbuf[i]*USECPERTICK, DEC);
    }
    Serial.print(" ");
  }
  Serial.println("");
}


void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    dump(&results);
    irrecv.resume(); // Receive the next value
  }
}

Following is the output after pressing IR remote button on and off.

Code:

FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)
Raw (116): -8900 600 -400 600 -1400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -1350 600 -400 650 -400 550 -1450 550 -1450 550 -450 600 -1400 550 -1450 550 -1450 600 -1400 600 -1400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 600 -400 600 -450 600 -400 550 -450 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 650 -400 600 -400 550 -450 550 -450 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 650 -400 550 -450 550 -450 600 -400 600 -400 600 -400 600 -1400 600 -1400 600 -2400 3100
FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)
Raw (116): -8850 650 -400 600 -1400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -1350 650 -350 650 -350 650 -1350 650 -400 600 -400 600 -1400 600 -1400 600 -1400 600 -1400 600 -1400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 650 -350 650 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 650 -350 650 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 600 -400 650 -350 650 -350 650 -400 600 -400 600 -400 600 -400 600 -1400 600 -1400 600 -1400 600 -1400 600 -2400 3100

 

i convert the raw data into 0s and 1s. Then i got the following hex

Code:

4049F00000000F 16 ON
404DF000000003 16 OFF
4049F00000000F 17 ON
404DF000000003 17 OFF
4049F00000000F 18 ON
404DF000000003 18 OFF

there is no change in raw . I think its long code that . I make the change in Rawbuf.

Code:

#define RAWBUF 240 // Length of raw duration buffer

I want to know how i can decode the exact code .Kindly tell me how can i do that..
Thanks

[Reply #1 on:]

What do you want to get from the IR ?
Is it a unique value for each key pressed or something else ?
If so, have you tried the demo code rather than the dump code ?

Code:

/*
 * IRremote: IRrecvDemo - demonstrates receiving IR codes with IRrecv
 * An IR detector/demodulator must be connected to the input RECV_PIN.
 * Version 0.1 July, 2009
 * Copyright 2009 Ken Shirriff
 * http://arcfn.com
 */

#include <IRremote.h>

int RECV_PIN = 11;

IRrecv irrecv(RECV_PIN);

decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}

void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    if (results.value == 0xFF00FF)
    {
      Serial.println("!");
    }
    irrecv.resume(); // Receive the next value
  }
}

[Reply #2 on:]

Thanks @UKHeliBob..
Its not unique ... If i pressed temp20 or 21 or any other temprature then same hex code is shown as a result.

FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)
FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)
FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)
FFFFFFFF
Decoded SANYO: FFFFFFFF (0 bits)

[Reply #3 on:]

The problem is that the Samsung AC remote control codes are very much longer than the normal TV type code, so you will have to do some work yourself. This link will give you a start;-
http://www.pcbheaven.com/userpages/Reverse_Engineering_Fidji_Air_Condition_IR_Protocol/

[Reply #4 on:]

Thank You Very Much @Grumpy_Mike.... I will come back with all simulation after the experiment.

[Reply #5 on:]

Thanks to all for Great help. I successfully decoded the  IR code of Samsung from gnuplot 4.6. I  Will Upload all Simulation after my complete experiment.

[Reply #6 on:]

@arslankhan, That is great new ! I have been thinking of doing a project with my sammy   It involves completely simulating the remote control using an arduino connected to my android phone via bluetooth.

Can you post the decoding portion of your arduino sketch ?

Currently I am using a raspberry pi and some python to decode the ir signals sent by the remote. My estimate is I would be able to decode the remote in a few days !

[Reply #7 on:]

Sorry to all i was too late to post the solution of samsung IR remote decoding.
I am here to explain step by step.

Code:

#include <avr/interrupt.h>
#include <avr/io.h>

#define TIMER_RESET  TCNT1 = 0
#define SAMPLE_SIZE  255

int IRpin = 3;
unsigned int TimerValue[SAMPLE_SIZE];
char direction[SAMPLE_SIZE];
byte change_count;
long time;

void setup() {
  Serial.begin(115200);
  Serial.println("Analyze IR Remote");
  TCCR1A = 0x00;          // COM1A1=0, COM1A0=0 => Disconnect Pin OC1 from Timer/Counter 1 -- PWM11=0,PWM10=0 => PWM Operation disabled
  // ICNC1=0 => Capture Noise Canceler disabled -- ICES1=0 => Input Capture Edge Select (not used) -- CTC1=0 => Clear Timer/Counter 1 on Compare/Match
  // CS12=0 CS11=1 CS10=1 => Set prescaler to clock/64
  TCCR1B = 0x03;          // 16MHz clock with prescaler means TCNT1 increments every 4uS
  // ICIE1=0 => Timer/Counter 1, Input Capture Interrupt Enable -- OCIE1A=0 => Output Compare A Match Interrupt Enable -- OCIE1B=0 => Output Compare B Match Interrupt Enable
  // TOIE1=0 => Timer 1 Overflow Interrupt Enable
  TIMSK1 = 0x00;          
  pinMode(IRpin, INPUT);
}

void loop()
{
  Serial.println("Waiting...");
  change_count = 0;
  while(digitalRead(IRpin) == HIGH) {}                                
  TIMER_RESET;
  TimerValue[change_count] = TCNT1;
  direction[change_count++] = '0';
  while (change_count < SAMPLE_SIZE) {
    if (direction[change_count-1] == '0') {
      while(digitalRead(IRpin) == LOW) {}
      TimerValue[change_count] = TCNT1;
      direction[change_count++] = '1';
    } else {
      while(digitalRead(IRpin) == HIGH) {}
      TimerValue[change_count] = TCNT1;
      direction[change_count++] = '0';
    }
  }
  Serial.println("Bit stream detected!");
  change_count = 0;
  time = (long) TimerValue[change_count] * 4;
  Serial.print(time);
  Serial.print("\t");
  Serial.println(direction[change_count++]);
  while (change_count < SAMPLE_SIZE) {
    time = (long) TimerValue[change_count] * 4;
    Serial.print(time);
    Serial.print("\t");
    Serial.println(direction[change_count-1]);
    Serial.print(time);
    Serial.print("\t");
    Serial.println(direction[change_count++]);    
  }
  Serial.println("Bit stream end!");
  delay(2000);
}

result shows

Code:

Analyze IR Remote
Waiting...
Bit stream detected!
0 0
3548 0
3548 1
5180 1
5180 0
5684 0
5684 1
6864 1
6864 0
7364 0
7364 1
8548 1
8548 0
9044 0
9044 1
9380 1
9380 0
9888 0
9888 1
10224 1
10224 0
10724 0
10724 1
11060 1
11060 0
11564 0
11564 1
12744 1
12744 0
13248 0
13248 1
13584 1
13584 0
14084 0
14084 1
14420 1
14420 0
14928 0
14928 1
16104 1
16104 0
16608 0
16608 1
17788 1
17788 0
18292 0
18292 1
18628 1
18628 0
19128 0
19128 1
20312 1
20312 0
20812 0
20812 1
21148 1
21148 0
21648 0
21648 1
21992 1
21992 0
22488 0
22488 1
23668 1
23668 0
24172 0
24172 1
25352 1
25352 0
25856 0
25856 1
26192 1
26192 0
26692 0
26692 1
27876 1
27876 0
28376 0
28376 1
29552 1
29552 0
30060 0
30060 1
30396 1
30396 0
30896 0
30896 1
31236 1
31236 0
31736 0
31736 1
32916 1
32916 0
33420 0
33420 1
33756 1
33756 0
34256 0
34256 1
34592 1
34592 0
35100 0
35100 1
36276 1
36276 0
36780 0
36780 1
37116 1
37116 0
37616 0
37616 1
37952 1
37952 0
38460 0
38460 1
38796 1
38796 0
39296 0
39296 1
39636 1
39636 0
40136 0
40136 1
40472 1
40472 0
40980 0
40980 1
41316 1
41316 0
41816 0
41816 1
42152 1
42152 0
42656 0
42656 1
42992 1
42992 0
43492 0
43492 1
43828 1
43828 0
44336 0
44336 1
44672 1
44672 0
45172 0
45172 1
45512 1
45512 0
46012 0
46012 1
46348 1
46348 0
46848 0
46848 1
47192 1
47192 0
47692 0
47692 1
48028 1
48028 0
48532 0
48532 1
48868 1
48868 0
49368 0
49368 1
49704 1
49704 0
50208 0
50208 1
50544 1
50544 0
51044 0
51044 1
51380 1
51380 0
51888 0
51888 1
52224 1
52224 0
52724 0
52724 1
53064 1
53064 0
53564 0
53564 1
54744 1
54744 0
55248 0
55248 1
55584 1
55584 0
56084 0
56084 1
56428 1
56428 0
56928 0
56928 1
57264 1
57264 0
57760 0
57760 1
58104 1
58104 0
58604 0
58604 1
58940 1
58940 0
59444 0
59444 1
59784 1
59784 0
60280 0
60280 1
60620 1
60620 0
61128 0
61128 1
61460 1
61460 0
61960 0
61960 1
62296 1
62296 0
62800 0
62800 1
63136 1
63136 0
63636 0
63636 1
63980 1
63980 0
64480 0
64480 1
64816 1
64816 0
65316 0
65316 1
65656 1
65656 0
66156 0
66156 1
67340 1
67340 0
67840 0
67840 1
68176 1
68176 0
68676 0
68676 1
69020 1
69020 0
69520 0
69520 1
69856 1
69856 0
70356 0
70356 1
70696 1
70696 0
71196 0
71196 1
71532 1
71532 0
72036 0
72036 1
73216 1
73216 0
73716 0
73716 1
74900 1
74900 0
75400 0
75400 1
75736 1
75736 0
76240 0
76240 1
77420 1
77420 0
77924 0
77924 1
79104 1
79104 0
79600 0
79600 1
79944 1
79944 0
80444 0
80444 1
80780 1
80780 0
81284 0
81284 1
81620 1
81620 0
82120 0
82120 1
82456 1
82456 0
82964 0
82964 1
83300 1
83300 0
83800 0
83800 1
84136 1
84136 0
84640 0
84640 1
84976 1
84976 0
85476 0
85476 1
85820 1
85820 0
86320 0
86320 1
87504 1
87504 0
88000 0
88000 1
88340 1
88340 0
88836 0
88836 1
89180 1
89180 0
89680 0
89680 1
90016 1
90016 0
90516 0
90516 1
90860 1
90860 0
91356 0
91356 1
91692 1
91692 0
92192 0
92192 1
92536 1
92536 0
93036 0
93036 1
93372 1
93372 0
93876 0
93876 1
94212 1
94212 0
94712 0
94712 1
95048 1
95048 0
95556 0
95556 1
95892 1
95892 0
96392 0
96392 1
96732 1
96732 0
97232 0
97232 1
97568 1
97568 0
98068 0
98068 1
98412 1
98412 0
98912 0
98912 1
99248 1
99248 0
99748 0
99748 1
100088 1
100088 0
100588 0
100588 1
100924 1
100924 0
101432 0
101432 1
101768 1
101768 0
102268 0
102268 1
102608 1
102608 0
103116 0
103116 1
103444 1
103444 0
103944 0
103944 1
104288 1
104288 0
104784 0
104784 1
105124 1
105124 0
105620 0
105620 1
105964 1
105964 0
106464 0
106464 1
106800 1
106800 0
107300 0
107300 1
107644 1
107644 0
108140 0
108140 1
108480 1
108480 0
108984 0
108984 1
109320 1
109320 0
109820 0
109820 1
110160 1
110160 0
110660 0
110660 1
110996 1
110996 0
111496 0
111496 1
111840 1
111840 0
112340 0
112340 1
112676 1
112676 0
113176 0
113176 1
113516 1
113516 0
114016 0
114016 1
114352 1
114352 0
114852 0
114852 1
115196 1
115196 0
115696 0
115696 1
116032 1
116032 0
116532 0
116532 1
116872 1
116872 0
117372 0
117372 1
117716 1
117716 0
118216 0
118216 1
118552 1
118552 0
119052 0
119052 1
119392 1
119392 0
119892 0
119892 1
120228 1
120228 0
120728 0
120728 1
121072 1
121072 0
121572 0
121572 1
121908 1
121908 0
122408 0
122408 1
122748 1
122748 0
123248 0
123248 1
123584 1
123584 0
124084 0
124084 1
124428 1
124428 0
124928 0
124928 1
125264 1
125264 0
125768 0
125768 1
126104 1
126104 0
126604 0
126604 1
126948 1
126948 0
Bit stream end!
Waiting...

Copy the result and past it in notpad, save it as dat extension file.
Open this file in gnuplot .(explain in uploaded figure named "gnuplot command"). Press enter to see the graph.
Graph shows mark and spaces.
code decoding is explained in the figure"gnuplot explain"
Anybody who did not understand can share his confusion.