Crystal interference DS1307

[bsarevalo]

Yes, the main thing is to do a good job of shielding to prevent interference with signals.

Hello again, thank you very much for answering, we have improved the connections, we want to know if we can connect the GND signal of the module to an electrical ground.

Now we have the following scenario! I am developing the program in Colombia and I am using the "RTClib.h" library that is posted in this forum, now in my laboratory I load the program and everything works perfectly, my client is in Spain and when I load the program it seems that at the moment After inserting the CR1220 backup battery, the RTC stops working, could you help me a little with this? I am writing to the NVRAM registers and using the command
if (!rtc.begin()){
 
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while(1) delay(10);

  }

Help me a little please!