{"product_id":"witty-pi-3-mini-realtime-clock-and-power-management-for-raspberry-pi","title":"Witty Pi 3 Mini: Realtime Clock and Power Management for Raspberry Pi","description":"\u003cp\u003eWitty Pi 3 Mini adds RTC (DS3231SN) and power management to your Raspberry Pi, and can define complex ON\/OFF sequence with simple script.\u003c\/p\u003e\n\u003cp\u003eAfter installing Witty Pi 3 Mini on your Raspberry Pi, you get some amazing new features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou can gracefully turn on\/off Raspberry Pi with single tap on the switch.\u003c\/li\u003e\n\u003cli\u003eAfter shutdown, Raspberry Pi and all its USB peripherals’ power are fully cut.\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi knows the correct time, even without accessing the Internet.\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi knows the temperature thanks to the sensor in RTC chip.\u003c\/li\u003e\n\u003cli\u003eYou can schedule the startup\/shutdown of your Raspberry Pi.\u003c\/li\u003e\n\u003cli\u003eYou can even write a script to define complex ON\/OFF sequence.\u003c\/li\u003e\n\u003cli\u003eMonitor external voltage and turn on\/off your Raspberry Pi accordingly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWitty Pi 3 Mini supports all Raspberry Pi models that has the 40-pin GPIO header, including A+, B+, 2B, Zero, Zero W, 3B, 3B+, 3A+ and 4B.\u003c\/p\u003e\n\u003cp\u003eWitty Pi 3 Mini uses the same software with Witty Pi 3. You just need to run these two commands in your Raspberry Pi to install the software:\u003c\/p\u003e\n\u003cp\u003e\u003ccode\u003epi@raspberrypi:~ $ wget http:\/\/www.uugear.com\/repo\/WittyPi3\/install.sh\u003c\/code\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ccode\u003epi@raspberrypi:~ $ sudo sh install.sh\u003c\/code\u003e\u003c\/p\u003e\n\u003cp\u003eComparing to \u003ca href=\"\/en-eu\/products\/witty-pi-3\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eWitty Pi 3\u003c\/a\u003e, Witty Pi 3 Mini uses the same RTC chip (DS3231SN) and same micro-controller (ATtiny841). The main difference is the \u003ca href=\"http:\/\/www.uugear.com\/product\/lm29150\/\" target=\"_blank\"\u003eLDO voltage regulator (LM29150)\u003c\/a\u003e is not populated on Witty Pi 3 Mini. This reduces the cost for those who don’t need this LDO, and also make things easier to integrate a different DC\/DC module into Witty Pi 3 Mini.\u003c\/p\u003e\n\u003cp\u003eUnlike Witty Pi 3 which uses a 3V button battery for off-power time keeping, Witty Pi 3 Mini uses a super capacitor (0.08F, or 80000uF) for this purpose.\u003c\/p\u003e\n\u003cp\u003eYou can find more information in its user manual: \u003ca href=\"http:\/\/www.uugear.com\/doc\/WittyPi3Mini_UserManual.pdf\" target=\"_blank\"\u003ehttp:\/\/www.uugear.com\/doc\/WittyPi3Mini_UserManual.pdf\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCONTENTS:\u003c\/h2\u003e\n\u003cp\u003eEach Witty Pi 3 Mini package contains:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWitty Pi 3 Mini board x 1\u003c\/li\u003e\n\u003cli\u003eM2.5 x 10mm plastic screw x 4\u003c\/li\u003e\n\u003cli\u003e4mm spacer x 4\u003c\/li\u003e\n\u003cli\u003eM2.5 plastic nut x 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSPECIFICATIONS:\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimension:\u003c\/td\u003e\n\u003ctd\u003e65mm x 30mm x 4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e8g (net weight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicro Controller\u003c\/td\u003e\n\u003ctd\u003eATtiny841 \u003ca href=\"http:\/\/www.uugear.com\/doc\/datasheet\/ATtiny841.pdf\" target=\"_blank\"\u003e(datasheet)\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRealtime Clock\u003c\/td\u003e\n\u003ctd\u003eDS3231SN \u003ca href=\"http:\/\/www.uugear.com\/doc\/datasheet\/DS3231.pdf\" target=\"_blank\"\u003e(datasheet)\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003eLED Indicator\u003c\/td\u003e\n\u003ctd\u003eRed LED: lights up when Raspberry Pi gets powered.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhite LED: lights up for a few seconds when a shutdown command is received, or blinks when device is standing by.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"4\"\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e20×2 surface-mounted header with 2.54 mm pitch and 2mm plastic height.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicro USB female connector as 5V DC input.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnpopulated 7-pin header for extension or integration.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnpopulated 3-pin header\/connector for VIN, GND and 5V.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Keeping\u003c\/td\u003e\n\u003ctd\u003eUsing 0.08F super capacitor as time keeping power source. Allows about 17 hours off-power time keeping.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower In\u003c\/td\u003e\n\u003ctd\u003eDC 5V (via micro USB). Possible to connect external DC\/DC converter (not included) and also have VIN monitored.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003eUp to 2.5A for Raspberry Pi and its peripherals. If using external DC\/DC converter, the output current is also limited by the capability of DC\/DC converter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandby Current\u003c\/td\u003e\n\u003ctd\u003e~ 1mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30℃~80℃ (-22F~176F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40℃~85℃ (-40F~185F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e0~80%RH, no condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFIRMWARE AND SOFTWARE\u003c\/h2\u003e\n\u003cp\u003eWitty Pi 3 Mini uses the same firmware and software with Witty Pi 3.\u003cbr\u003e\u003cbr\u003eThe source code of firmware and software can be found on Github: \u003ca href=\"https:\/\/github.com\/uugear\/Witty-Pi-3\" target=\"_blank\"\u003ehttps:\/\/github.com\/uugear\/Witty-Pi-3\u003c\/a\u003e\u003c\/p\u003e\n\u003ch1\u003eSCHEDULE SCRIPT GENERATOR\u003c\/h1\u003e\n\u003cp\u003eYou can now use \u003ca href=\"http:\/\/www.uugear.com\/app\/wittypi-scriptgen\/\" target=\"_blank\"\u003ethis web app\u003c\/a\u003e to create and debug the schedule script for Witty Pi.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"UUGear","offers":[{"title":"Default Title","offer_id":39447710662739,"sku":"WITTY_PI_3_MINI","price":18.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/01_62513099-1e8e-4817-a96b-0b6fef383c07.jpg?v=1631017419","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/witty-pi-3-mini-realtime-clock-and-power-management-for-raspberry-pi","provider":"Pimoroni Ltd","version":"1.0","type":"link"}