Witty Pi 3 Mini - RTC & Power Management for Raspberry Pi

Product ID: 5038


Witty Pi 3 Mini adds RTC (DS3231SN) and power management to your Raspberry Pi, and can define complex ON/OFF sequence with simple script.

It's a small electronic board that can add real-time clock and power management to your Raspberry Pi. Witty Pi 3 Mini is a new member of the third generation of Witty Pi, and it has bonnet/pHAT form factor.

After installing Witty Pi 3 Mini on your Raspberry Pi, you get some amazing new features:

  • You can gracefully turn on/off Raspberry Pi with a single tap on the switch.
  • After shutdown, Raspberry Pi and all its USB peripherals’ power are fully cut.
  • Raspberry Pi knows the correct time, even without accessing the Internet.
  • Raspberry Pi knows the temperature thanks to the sensor in the RTC chip.
  • You can schedule the startup/shutdown of your Raspberry Pi.
  • You can even write a script to define a complex ON/OFF sequence.
  • Monitor external voltage and turn on/off your Raspberry Pi accordingly.

Witty Pi 3 Mini supports all Raspberry Pi models that have the 40-pin GPIO header, including A+, B+, 2B, Zero, Zero W, 3B, 3B+, 3A+, and 4 B+.

Raspberry Pi communicates with the RTC chip (DS3231) on Witty Pi 3 Mini via I2C protocol. The DS3231 chip has a fixed I2C address: 0x68. Also Witty Pi 3 Mini has a micro controller (ATtiny841), which also works as an I2C peripheral, and the micro controller’s I2C address is 0x69.

Witty Pi 3 Mini uses the same software as Witty Pi 3. You just need to run these two commands in your Raspberry Pi to install the software:

[email protected]:~ $ wget http://www.uugear.com/repo/WittyPi3/install.sh
[email protected]:~ $ sudo sh install.sh

Technical Details

Each Witty Pi 3 Mini package contains:

  • Witty Pi 3 Mini board x 1
  • M2.5 x 10mm plastic screw x 4
  • 4mm spacer x 4
  • M2.5 plastic nut x 4