The guys at Pi Supply were kind enough to send me a PaPiRus Zero v1.1 to play with, so here’s how I set it up and what I did with it 🙂

Contents

Prerequisites

You’ll require a Raspberry Pi Zero with WiFi connection, although it would work just as well on Pi 3 for example.

Ensure you are running the latest Raspbian Jessie and it is fully updated:

sudo apt-get update && sudo apt-get upgrade -y

and SPI is enabled:

sudo raspi-config
9 Advanced Options > A5 SPI > Enable

Reboot to apply the changes:

sudo reboot

Assembly

Assembling the PaPiRus Zero is not that hard, but requires certain caution with the ePaper display itself, as it is very fragile.

You should have the following pieces as part of the kit:

PaPiRus Zero v1.1 PCB
ePaper display (1.44″ or 2.0″)
two double-sided sticky pads
two spacers
four screws

Place the PCB with GPIO connector facing up, and gently open the brown connector. Slide in the display, with contacts facing down. Close the connector.

Turn the assembly around and apply the sticky pads to the display. Make sure you do not put the pads to close to the edges of the display.

Bend over the display onto the PCB and push gently until the pads stick. You should be left with enough clearance to install the optional mounting spacers.

Software

Installing the software was a breeze, and the issues encountered a while back, while testing the original PaPiRus, have been resolved.

The instructions are available on the Pi-Supply GitHub repository: https://github.com/PiSupply/PaPiRus, but boil down to these two commands:

pi@raspberrypi:~ $ curl -sSL https://goo.gl/i1Imel | sudo bash

pi@raspberrypi:~ $ sudo papirus-set 2.0

If you encounter an issue like the one below when attempting to run an example:

pi@raspberrypi:~ $ sudo papirus-clock Traceback (most recent call last): File "/usr/local/bin/papirus-clock", line 121, in <module> main(sys.argv[1:]) File "/usr/local/bin/papirus-clock", line 64, in main papirus = Papirus() File "/usr/local/lib/python2.7/dist-packages/papirus/epd.py", line 66, in __init__ with open(os.path.join(self._epd_path, 'version')) as f: IOError: [Errno 2] No such file or directory: '/dev/epd/version'

Perform following action and try again:

pi@raspberrypi:~ $ sudo service epd-fuse restart

The example application should now run and you should be all set to create your own project!

Mini Project

As a mini project for my PaPiRus Zero, I decided to display my home’s power consumption data. This data originates from an emonPi installed next to my switchboard. The data can be retrieved via MQTT and displayed on the PaPiRus.

Here’s a video of the PaPiRus Zero updating the values as it receives them via MQTT. The display is partially updated when a new value is received, and fully updated every minute: