X230 RS232 Seria Port & Real-time Clock (RTC) Expansion Board for Raspberry Pi

Features: Useful communication board supporting the RS232 serial protocol Control the Raspberry Pi over RS232 or connect to external serial accessories Connected to the UART port on the Raspberry Pi using a MAX3232 interface Allowing communication with RS232 compatible devices over a DB9 serial cable or with the use of a null-modem cable Allowing terminal access with linux on the Raspberry Pi using a terminal application The RS232 port can be accessed through the DB9 port or the screw terminals on the PCB Battery backed real-time clock module for the Raspberry Pi Keeps track of the time while the Raspberry Pi is switched off Allows the Raspberry Pi to retrieve the current date and time when it is switched back on Uses the most precise DS3231 RTC real time clock and a CR2032 battery to maintain the date and time Perfect for datalogging, clock-building, time stamping, timers and alarms, etc. Stackable with other Raspberry Pi accessory boards A coin cell is required to use the battery-backup capabilities. We don't include one by default, to make shipping easier for those abroad WIKI for reference. Packing Included: 1 x X230 board (without button battery) 1 x Install Screws pack PS: The battery model is CR2032 (No include)