PiFaceRealTimeClockuserguide PiFaceRealTimeClockmeansyourRaspberryPialwayshasthecorrecttime.Furthermore, itsthatsmallyoullhardlynoticeitsthere Youcanslipitinsidemostcasesand u n d e r,most addonboards Thisguideexplainshowtoinstallabattery,fitPiFaceRealTimeClocktoaRaspberryPiand installthesoftware. UsingthePiFaceRealTimeClock BeforeattachingordetachingyourPiFaceRealTimeClocktoyourRaspberryPi,make sureyourRaspberryPiisturnedoffandisdisconnectedfrompower. Installing the battery PiFaceRealTimeClockusesasmallcoincellbatterytokeeptimewhentheRaspberryPiis turnedoff.Beforeuse,thisbattery,aCR1220mustbefitted. SlideaCR1220batteryintothebatteryholderwiththepositiveside(flatsidemarkedwitha+) facingupwards,inthedirectionindicatedbytheredarrowintheimagebelow.Fitting on the Raspberry Pi WiththebatterytowardsthecentreoftheRaspberryPi,alignthePiFaceRealTimeClocks holesovertheRaspberryPisGPIOpins.CarefullyslidethePiFaceRealTimeClockalltheway downthepins,ensuringtheyarebothkeptlevelasyoudoso. Installing the Software DriversneedtobeinstalledsotheRaspberryPicaninitiallysetthetimeonthePiFaceReal TimeClockandthenreaditwhenbooting. ThesoftwareforPiFaceRealTimeClockisonourGitHubrepositoryonline.Youcandownload thisintwoways: RaspberryPiconnectedtotheInternet IfyouareconnectedtotheInternetdownloadtheinstallationscriptbyopeningaTerminal windowandenteringthefollowingcommand: wget