why do you have two rtc ?
I thought the first one is broken so I bought another one
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What is the DS pin ??
I choose pin 52 as my DS
The RTC needs a battery, so it doesn't forget the time every time you disconnect the arduino.
I know , and the battery is connected as well
You need to be more forthcoming about what the problem is. Note that, in the clock project I alluded to, there are two programs - one to set the time, the other to read the time ( the clock)!
I try to set the time with the second program , then i open the serial monitor and the time was as before (165:165...)
Connection :
SCl - SCL
SDA - SDA
maybe the SCl & SDA on board is damaged ? how can i test it ?
thank you all