Librairie Makuna Freez

[gtbyio]

Hello

on an Arduino Uno v3 base, some tests on a DS3231 module from Adafruit brought me here :)

Short explanation : when I disconnect the 5volt power supply of the module, my arduino program is blocked, the Loop doesn't run anymore, it's a bit annoying.

So I'm facing a blocking library, and it's not the only one, I tested the most popular ones and they all have the same symptom "Bloking Loop" :)

So why I disconnect the Plus +5v!? because I find life too easy? No, it's because I don't like to be taken by surprise, so I test and re-test my setups before putting them into service.

a french thread https://forum.arduino.cc/t/librairie-makuna-freez/1081415/1 on this story

(c good the atmosphere is not violent, you can enter)

Translated with www.DeepL.com/Translator (free version)

[Makuna]

This is more than likely due to you are not setting the timeout. This was a change made to the Wire API that this library uses for that RTC. You can read about it here. This timeout feature is not universal across platforms. So, it will just lock up if it doesn't find the device is normal operating procedure from WIRE.

I am including the relevant parts of your code (simplified and modified) here.

setup() {
    Serial.begin(115200);
    //Wire.begin();  // test avec ajout -- inutil 
    Serial.println (F("RTC Makuna DS3231 LOOP FreeZ ")) ;
    
    Serial.print("compiled: ");
    Serial.print(__DATE__);
    Serial.println(__TIME__);

    Rtc.Begin();  // Démarre la communication avec RTC
    Wire.setWireTimeout(); // 
}

void loop ()  {
     RtcDateTime now = Rtc.GetDateTime();
     Serial.print(Rtc.LastError());
     Serial.println(" after GetDateTime");

	RtcTemperature temp = Rtc.GetTemperature();
     Serial.print(Rtc.LastError());
     Serial.println(" after GetTemperature");

    delay(3000); // 3 seconds

Can you run this and copy the serial output here?

[gtbyio]

I think it's good

part with +5v
...
0 after GetTemperature
0 after GetDateTime
0 after GetTemperature
...
game without the +5v
...
5 after GetDateTime
5 after GetTemperature
5 after GetDateTime
5 after GetTemperature
...

[Makuna]

I should probably improve the examples to at least mention this timeout. If you want you can create an issue on "improve the examples to set timeout"

[gtbyio]

Yes, I have tested again, the problem is solved
Thank you very much Makuna
... a 1st choice after sales service :)

the Rtc.LastError function is very useful