The RTC module can provide you a real-time clock. You can make the controller to ask the module: "hi buddy, what time is it?".Install a small coin cell, and it can serve you for more than six months.
Xadow is a though small but perfectly formed Arduino(TM) compatible board series containing several modules. It's a kit extremely suitable for space-sensitive projects such as wearable devices & arts designs, which have higher request on size, weight and flexible cascade connection.
- Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, and Year with Leap-Year Compensatio
- Low power consumption