JeeNode and OOK433 plug

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Besides an Arduino Mega 2560 I can also use a JeeNode to do some experiments. The JeeNode is made based upon the Arduino but it has several differences. Like, it has fewer ports, it runs on 3.3V instead of 5V, it is smaller and has I2C support. Another great feature is the RFM12B wireless RF chipset that can be used to let JeeNodes communicate with eachother. Take a look at the JeeLabs blog for a ton of information, it is really great.

Because one of the wishes for my domotica solution is controlling KAKU devices a 433Mhz OOK RF receiver and transmitter is needed.  JeeLabs has a nice solution; the OOK 433 plug.

This plug has two 433 Mhz chipsets; one to send and one to receive signals. KAKU uses On-Off-keying (OOK) modulation for sending and receiving signals.

KAKU remote YCT-102

I assembled the plug and tested the ookDecoder.pde sketch (look at the bottom of the page), together with my KAKU YCT-102 remote. I was lucky as it worked right away; I read that some people weren’t able to get it working in combination with another KAKU remote (probably an older version).

It also works with the KAKU doorbell transmitter (ACDB-6500BC).

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One thing to mention is that the sketch decodes the signals as ‘HEZ’ signals instead of ‘KAKU’ signals. Some other website also mentioned that the signals of the UCR-4285 universal KAKU remote were also recognized as ‘HEZ’ signals.

However, if you remove ¬†‘HezDecoder hez;’ in the ookDecoder.pde sketch the signals will show up as KAKU commands!

As for now I haven’t tried to send KAKU commands so I don’t know if that works in combination with my KAKU socket units.

Because I cannot find the webpage to download the ookDecoder.pde sketch I include it below. All credits go to Jean-Claude (owner of JeeLabs and creator of the JeeNode hardware) see the comments in the code.


// New code to decode OOK signals from weather sensors, etc.
// 2010-04-11 <>
// $Id: ookDecoder.pde 7527 2011-04-11 01:57:48Z jcw $

#include "decoders.h"

#define USE_433 1
#define USE_868 0

#if USE_433
OregonDecoder orsc;
CrestaDecoder cres;
KakuDecoder kaku;
XrfDecoder xrf;
HezDecoder hez;

#if USE_868
VisonicDecoder viso;
EMxDecoder emx;
KSxDecoder ksx;
FSxDecoder fsx;

#define PORT 1

volatile word pulse;

    static word last;
    // determine the pulse length in microseconds, for either polarity
    pulse = micros() - last;
    last += pulse;

void reportSerial (const char* s, DecodeOOK& decoder) {
    byte pos;
    const byte* data = decoder.getData(pos);
    Serial.print(' ');
    for (byte i = 0; i < pos; ++i) {
        byte d = data[i];
        Serial.print(d & 0x0F, HEX);
        Serial.print(d >> 4, HEX);
    // Serial.print(' ');
    // Serial.print(millis() / 1000);

void setup () {
    pinMode(13 + PORT, INPUT);  // use the AIO pin
    digitalWrite(13 + PORT, 1); // enable pull-up

    // use analog comparator to switch at 1.1V bandgap transition
    ACSR = _BV(ACBG) | _BV(ACI) | _BV(ACIE);

    // set ADC mux to the proper port
    ADCSRA &= ~ bit(ADEN);
    ADCSRB |= bit(ACME);
    ADMUX = PORT - 1;

void loop () {
    word p = pulse;
    pulse = 0;

#if USE_433
    if (p != 0) {
        if (orsc.nextPulse(p))
            reportSerial("ORSC", orsc);        
        if (cres.nextPulse(p))
            reportSerial("CRES", cres);        
        if (kaku.nextPulse(p))
            reportSerial("KAKU", kaku);        
        if (xrf.nextPulse(p))
            reportSerial("XRF", xrf);        
        if (hez.nextPulse(p))
            reportSerial("HEZ", hez);        

#if USE_868
    if (p != 0) {
        if (viso.nextPulse(p))
            reportSerial("VISO", viso);        
        if (emx.nextPulse(p))
            reportSerial("EMX", emx);        
        if (ksx.nextPulse(p))
            reportSerial("KSX", ksx);        
        if (fsx.nextPulse(p))
            reportSerial("FSX", fsx);        

Nodo can do KAKU too …

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