This Arduino Shield allows users to add Wirelings to their Standard Arduino projects. Featuring a 4-channel Multiplexer, Real-Time Clock (RTC), on-board voltage regulation and level shifting, this board allows you to add up to 4 Wireling Boards to your project with ease! 

Technical Specifications : 

TI PCA9544A Multiplexer Specifications:

• I2C Bus 

• Four Active-Low Interrupt Inputs

• Active-Low Interrupt Output

• Three Address Pins 

• DS1339 I²C Serial Real-Time Clock (RTC)

• Manages all Timekeeping functions: Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100

• Two Time-of-Day alarms

• Voltage: 3.0V - 5.5V 

• A5/SCL - I²C Serial Clock line

• A4/SDA - I²C Serial Data line

• IO2 - Used for RTC

• IO3 - Used for RTC

• IO4 - Power Control 

• 53.34mm x 57.58mm (2.1 inches x 2.27 inches)

• Max Height: 12.5mm (0.48 inches) Measured from the top of the 5-pin connectors, and the bottom of soldered header pins

Notes: 

• The multiplexer used allows you to use two or more I²C devices with the same address, without interference problems. 
• 5-Pin Wireling cables not included and sold separately.

Package Includes:

• 1 x Wireling Arduino Shield