{"title":"Witty Pi 4 HAT - RTC & Power Management for Raspberry Pi","handle":"witty-pi-4-hat-rtc-power-management-for-raspberry-pi","url":"/products/witty-pi-4-hat-rtc-power-management-for-raspberry-pi","description":"The Witty Pi 4 is a Raspberry Pi HAT that adds a precision real-time clock, power management, and scheduling capabilities. Define ON/OFF sequences to significantly reduce energy usage in battery-powered systems, or use temperature thresholds to trigger automatic startup and shutdown.\n\nA built-in DC/DC converter accepts 6–30V DC input, and an e-latching power switch provides graceful shutdown — just like a PC power button. The board also supports 5V input via USB Type-C.\n\nKey Features\n\n\nReal-Time Clock – Factory calibrated, temperature compensated, ±2 ppm accuracy\n\nTemperature Sensor – 0.125 °C resolution, usable for temperature-triggered actions\n\nDC/DC Converter – Accepts 6–30V DC input\n\nE-Latching Power Switch – Graceful shutdown via single button tap\n\nON/OFF Scheduling – Time-based and temperature-based startup/shutdown sequences\n\nMCU – AVR 8-bit microcontroller with 8 KB programmable flash\n\nSingle I²C Device – Default address 0x08 (configurable), proxies RTC and temperature sensor\n\nUWI Support – Web-based management via UUGear Web Interface\n\n\nCompatibility\n\nRaspberry Pi A+, B+, 2B, 3B, 3B+, 3A+, 4B\nRaspberry Pi Zero, Zero W, Zero 2 W (requires soldered 40-pin header)\nRaspberry Pi OS (other Linux distributions may require manual configuration)\n\n\nInstallation\n\n\n\n💻 Terminal\n\nwget https://www.uugear.com/repo/WittyPi4/install.sh\nsudo sh install.sh\n\n\nPackage Contents\n\n1× Witty Pi 4 board\n1× 30 cm 22AWG XH 2.54 cable\n4× M2.5 × 11 mm copper standoffs\n8× M2.5 screws\n\n\n\nNote: Coin cell battery is not included and must be purchased separately.\n\n\nResources\n\nSoftware & Firmware (GitHub)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":51,"title":"Default Title","sku":"AF-5704","price":89.34,"on_sale":false,"in_stock":true,"available_quantity":54,"option1":"Default Title"}]}