RTC I2C IIC DS3231SN Real Time Clock Module

Description :

• Can provide for arduino libraries and routines
• Use DS3231SN precision clock chip, built 32.768 crystal
• Can provide precise year, month, day, hour, minute, second, in the morning and afternoon data
• You can output 1Hz signal, a second output signal
• You can use the CR1220 coin cell holding travel time
• The pull-up resistor R1 R2 own welding on the I2C bus
• Small size 3cm in diameter
• Pin spacing 22.86mm