Problem sending signal by pin sq ds1307 rtc

Projects Networking, Protocols, and Devices
1

Good evening, I'm developing a project for the arduino to wake up once a day at 03 o'clock in the morning and light a led. After that he goes back to sleep. To wake up the arduino wanted to generate a pulse by the sq pin. But I can not

2

From the DS1307 datasheet: "The SQW/OUT pin is open drain which requires an external pullup resistor."

This means you need a resistor between that pin and VCC. Typically 4.7K or 10K or maybe even the just activate the built-in one in your Arduino.

Don