its an A fridge. It is yet time to replace it, but I will need to consider this in the future…

-Mathias

this is NOT A++, A+ or even A, correct ?

nothing happens to my theory – I only state that demand side management is a way to stabilize the power grid while variable power sources such as wind or photovoltaik are utilized, nothing more. Besides, from my point of view, global warming is not a political agenda. Its a fact, based on the works of a majority of climate researchers. A good summary of their findings was published 2001 within the IPCC Third Assessment, “Summary for Policymakers”. Whether you believe them or not is your choice.

Cheers,
-Mathias

Thanks for sharing the code, but I had nearly no chance to retrieve a clean signal from the conrad DCF77 receiver. Every 3 to 4 seconds the debug information shows several short signals before the 100ms and 200ms signals. I’ve modified the interrupthandler to ignore the jitter:

/**
* Interrupthandler for INT0 – called when the signal on Pin 2 changes.
*/
void int0handler() {
int length = millis() – previousFlankTime;
if (length < 10) {
// ignore jitter
return;
}
// check the value again – since it takes some time to
// activate the interrupt routine, we get a clear signal.
DCFSignalState = digitalRead(DCF77PIN);
}

and removed the DCFSignalState assignment in the main loop.

The problem concerning TCCR2 can be easily solved via the MsTimer2 Library. Changing the interrupt initialisation to:

/**
* Initialize the DCF77 routines: initialize the variables,
* configure the interrupt behaviour.
*/
void DCF77Init() {
previousSignalState=0;
previousFlankTime=0;
bufferPosition=0;
dcf_rx_buffer=0;
ss=mm=hh=day=mon=year=0;
#ifdef DCF_DEBUG
Serial.println("Initializing DCF77 routines");
Serial.print("Using DCF77 pin #");
Serial.println(DCF77PIN);
#endif
pinMode(BLINKPIN, OUTPUT);
pinMode(DCF77PIN, INPUT);

#ifdef DCF_DEBUG
Serial.println("Initializing timerinterrupt");
#endif
MsTimer2::set(1000, advanceClock); // 500ms period

#ifdef DCF_DEBUG
Serial.println("Initializing DCF77 signal listener interrupt");
#endif
attachInterrupt(0, int0handler, CHANGE);
}

removing the old interrupthandler and added the advanceClock function:

/**
* The interrupt routine for counting seconds – increment hh:mm:ss.
*/
void advanceClock() {
ss++;
if (ss==60) {
ss=0;
mm++;
if (mm==60) {
mm=0;
hh++;
if (hh==24)
hh=0;
}
}
}

The timer is started in "Parity check OK – updating time" branch via MsTimer2::start(). The sideeffect of placing the MsTimer2::start after a positive parity check is that the time is only printed after successful decoding of the DCF77 Data.

I'll mail you the complete sketch for integrating the changes in a version 0.0.3

Best regards

In function ‘void DCF77Init()’:
error: ‘TCCR2′ was not declared in this scope

I use also the latest enviroment 0017
What have you done so that it runs the program?

Thanks a lot for your help,

Willy

int TIMSK;
int TCCR2;
int OCIE2;

So far with my reciever that i got today i have not got it working but its most likely my fault.
Rory

danke für den Hinweis – wenn die beiden kooperiert haben macht das natürlich Sinn.

-Mathias