Badger 2040 W (Pico W Aboard)

Description
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Badger 2040 W (Pico W Aboard) – Badger W Only - A programmable badge with fast updating E Ink® display and wireless connectivity, powered by Raspberry Pi Pico W

Badger 2040 W is a maker-friendly all-in-one badge wearable, designed for efficient identification of humans and other lifeforms. It's great for powering by battery, as it can go into an ultra low power sleep mode when the screen's not being refreshed. And because it's a handy microcontroller with built in screen that can fit right in your pocket, we bet you could use it for a bunch of other cool experimental projects too.

On the front, you'll find the black and white 2.9" e-paper screen, a selection of buttons to poke at and a slot to clip it onto a lanyard. On the back, there's a battery connector, a reset button and a Qw/ST connector for plugging in Qwiic or STEMMA QT breakouts. And now that it's got a Raspberry Pi Pico W Aboard it can communicate wirelessly with other devices and retrieve tasty data from the internet, hoorah!

What's new for Badger W

A bunch of improvements are made to the OG Badger (in addition to the 2.4GHz wireless connectivity).

Inspired by our other Pico W Aboard products we've added an onboard RTC (Real Time Clock) so that Badger W can keep track of the time whilst it's asleep, and means it can wake up on a timer, as well as on a button press.
Our C++/MicroPython software libraries for Badger W now use our in-house tiny graphics library, PicoGraphics. This means it's much easier to get images onto your Badger and code is simple to port between different Pimoroni displays.
All the pre-loaded MicroPython BadgerOS examples now show up properly on Badger W's filesystem so you can tinker with them easily - great for figuring out how things work! We've added a few new examples to BadgerOS that do wireless stuff.

Pico W x E Ink®

It makes for a lovely, crisp, high contrast display that's nice and readable and it doesn't squirt unnecessary blue light into your environs like LCDs do. It's also ultra low power (EPD displays only consume power while they're refreshing), and the images on the display stick around for a really long time whilst the display is unpowered.

Using a Raspberry Pico W means we can drive the hardware in fun, experimental, low level ways. We've written custom drivers for the EPD display that prioritise low power consumption whilst enabling lightning fast refresh rates.

Features

2.9" black and white E Ink® display (296 x 128 pixels)

Ultra wide viewing angles
Ultra low power consumption
Dot pitch - 0.227 x 0.226 mm

Raspberry Pi Pico W Aboard

Dual Arm Cortex M0+ running at up to 133Mhz with 264kB of SRAM
2MB of QSPI flash supporting XiP
Powered and programmable by USB micro-B
2.4GHz wireless

Five front user buttons
Reset button
White LED
JST-PH connector for attaching a battery (input range 2.7V - 5.5V)
Qw/ST (Qwiic/STEMMA QT) connector
Dedicated RTC chip (PCF85063A) for deep sleep / wake *
Fully-assembled (no soldering required)
Schematic
Dimensional drawing
C++/MicroPython libraries

Software

The C++/MicroPython libraries include support for the Badger W display. You'll get best performance using C++, but if you're a beginner we'd recommend using our batteries included MicroPython build for ease of getting started.

You can draw on the screen using our lightweight PicoGraphics library, which includes functions for displaying text, shapes and images (plus individual pixels of course), and we've provided some examples to get you started.

Badger W ships pre-loaded with MicroPython and our BadgerOS suite of examples. To enable Badger W to connect to the internet, you'll need to edit WIFI_CONFIG.py using Thonny and add your Wi-Fi details. To return to the launcher from an example, hold down the A and C buttons at the same time.

MicroPython

C/C++

Picographics function reference

Connecting Breakouts

The Qw/ST connector on Badger W makes it super easy to connect up Qwiic or STEMMA QT breakouts. If your breakout has a QW/ST connector on board, you can plug it straight in with a JST-SH to JST-SH cable.

Breakout Garden breakouts that don't have a Qw/ST connector can be connected using a JST-SH to JST-SH cable plus a Qw/ST to Breakout Garden adaptor.

List of breakouts currently compatible with our C++/MicroPython build.

Notes

Measurements: 85.6mm x 48.7mm x 10mm (L x W x H, including connectors). The mounting holes are M2.5 and 3.0mm in from each edge. The corner radius is 3mm.
Badger W is fairly accommodating about input voltage (2.7V - 5.5V), so it's possible to use a variety of different batteries and battery packs. A 2x AAA battery pack fits behind Badger W nicely (double/triple AA and AAA battery packs will also work though). If you're using rechargeable (NiMH) batteries , we'd recommend using a 3x AAA battery pack.
Alternatively, you can plug a LiPo/LiIon battery into the battery connector, with the following caveats. Please only consider this if the person wearing the badge is an adult and knows what they're doing with LiPos!

A solid enclosure or backplate to protect the battery from damage whilst being worn is a very good idea.
There's no battery protection included on Badger W, so you should only use it with LiPo batteries that include internal protection.
Badger W doesn't have battery charging circuitry onboard (this is so it's safe to use with either alkaline or LiPo batteries). You'll need an external LiPo charger to charge the battery (like a LiPo Amigo).

* Badger W's onboard RTC (Real Time Clock) means it can go into a super deep sleep mode that only draws about 20uA of power, turning off the power that drives the Pico W and the display completely. It can be woken back up by the RTC or the front buttons. You can also read the RTC to keep track of the time and date, of course!