Real Time Clock
модель :
GFA-S3501-FA00
Main Parts :
Power Jack x 2
DS-1302 RTC Module x 1
3x2-pin Stackable Header x 1
Serial Interface：I2C
I2C Address：0x68
Battery：CR2032 (not included)
Brick Unit：6 x 5
Note : SQW pin connect to a LED indicator
