Witty Pi 3: Realtime Clock and Power Management for Raspberry Pi

Description

Witty Pi 3 is the third generation of Witty Pi, and it is the upgraded version of Witty Pi 2. It adds realtime clock (RTC) and power management to your Raspberry Pi, and can define complex ON/OFF sequence with simple script. Witty Pi 3 supports all Raspberry Pi models with 40-pin header such as 4B, 3B+, 3B, 3A+, 2B, B+, A+, Zero, Zero W.

Witty Pi 3 uses the same RTC chip (DS3231SN) as compare to the Witty Pi 2 and it comes with a new micro-controller (ATtiny841), which enables it to act smarter and handle more complex situations. Thanks to the new on-board LDO voltage regulator (LM29150), Witty Pi 3 can acknowledge DC voltage higher than 5V (up to 26V, depends on the load and heat sink).

You just need to run these two commands in your Raspberry Pi to install Witty Pi 3’s software:

pi@raspberrypi:~ $ wget http://www.uugear.com/repo/WittyPi3/install.sh
pi@raspberrypi:~ $ sudo sh install.sh 

Features

After installing the software on your Raspberry Pi, you can enjoy these amazing new features:

• It can power the Raspberry Pi with higher voltage.
• It can gracefully turn on/off Raspberry Pi with 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 RTC chip.
• It can schedule the startup/shutdown of the Raspberry Pi.
• It can even write a script to define complex ON/OFF sequence.
• Shutdown Raspberry Pi when input voltage is lower than pre-set value.
• Turn on Raspberry Pi when input voltage raise to pre-set value.
• When the OS loses response, It can long hold the switch to force power cut.

Specifications

• Dimension: 65mm x 56mm x 19mm (Approx.)
• Weight: 20g (net weight without battery)
• Battery: CR2032 (for time and alarms keeping)
• Static Current: ~1mA
• Operating Temperature: -30℃~80℃ (-22°F~176°F)
• Storage Temperature: -40℃~85℃ (-40°F~185°F)
• Humidity: 0~80%RH, no condensing
• Power In: DC 5V (via micro USB) or DC 5.3V~26V (via XH2.54 connector)
• Output Current: Up to 3A for Raspberry Pi and its peripherals if input via micro USB port. Up to 2A if input via XH2.54 connector.

Software

- The Software for Witty Pi 3 is written with BASH (Unix shell).

- To install the software, just run these two commands:

pi@raspberrypi:~ $ wget http://www.uugear.com/repo/WittyPi3/install.sh
pi@raspberrypi:~ $ sudo sh install.sh

- After the installation is done, reboot your Raspberry Pi.

- To launch the Witty Pi utility, just run these commands:

pi@raspberrypi ~ $ cd wittypi
pi@raspberrypi ~/wittypi $ ./wittyPi.sh

SCHEDULE SCRIPT GENERATOR

You can now use the web app to create and debug the schedule script for Witty Pi.

Kit Content

• 1 x Witty Pi 3 board
• 1 x CR2032 battery
• 4 x M2.5 x 11mm Copper Standoff
• 8 x M2.5 screws