Trammell HudsonJul 5, 2022
Rather than make new devices that will turn into e-waste after the event, we're recycling old price tags into networked conference badges. https://github.com/osresearch/eink-pricetags
GitHub - osresearch/eink-pricetags: Reverse engineering cheap e-ink price tags

Reverse engineering cheap e-ink price tags. Contribute to osresearch/eink-pricetags development by creating an account on GitHub.

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Show threadTrammell HudsonJul 5, 2022
Floyd-Steinberg dithering looks nice on the high-density B&W e-ink screen
Show threadTrammell Hudson
Provisioning mode with inverse colors
Jul 5, 2022 at 10:41pmWeb
Show threadTrammell HudsonJul 6, 2022
Now with battery voltage measurement in the telemetry
Show threadTrammell HudsonJul 6, 2022
New images are sent to the tags using the A7106 radio module from another tag, driven by gpio from a Pi. https://github.com/cibomahto/pya7106
GitHub - cibomahto/pya7106: Python library for the A7106 radio module

Python library for the A7106 radio module. Contribute to cibomahto/pya7106 development by creating an account on GitHub.

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Show threadmomoJul 6, 2022
@th
So you could generate art with a chain of those tags that travels from one tag to another and mutates over time.
Great work!
Show threadTrammell HudsonJul 7, 2022
@momo tag-to-tag communication is possible, although battery life is a challenge - RX mode takes 18mA, compared to sleeping 5uA. https://github.com/osresearch/eink-pricetags/issues/8
power: measure during image updates and during redisplay · Issue #8 · osresearch/eink-pricetags

how many images can we receive before we drain the battery?

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Show threadmomoJul 7, 2022
@th Okay that is a huge difference. More than 3 times the power drain.
Show threadTrammell HudsonJul 7, 2022
@momo it's even worse: more than 3000 times the power.
Show threadmomoJul 7, 2022
@th I was missing the k when typing.
Show threadArthur ElsenaarJul 6, 2022
@th Getting more interesting by the hour 😀
Show threadrealcaseyrollins ✝️Jul 5, 2022
This is really cool
Show threadLou 🌝Jul 6, 2022
@th maybe this would interest you then:
https://github.com/furrtek/PrecIR
GitHub - furrtek/PrecIR: You know what this is for ;-)

You know what this is for ;-). Contribute to furrtek/PrecIR development by creating an account on GitHub.

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Show threadGraceJul 6, 2022
@th stuff a QR code generator in it?