Rather than make new devices that will turn into e-waste after the event, we're recycling old price tags into networked conference badges. github.com/osresearch/eink-pri

Floyd-Steinberg dithering looks nice on the high-density B&W e-ink screen

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Now with battery voltage measurement in the telemetry

New images are sent to the tags using the A7106 radio module from another tag, driven by gpio from a Pi. github.com/cibomahto/pya7106

@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!

@momo tag-to-tag communication is possible, although battery life is a challenge - RX mode takes 18mA, compared to sleeping 5uA. github.com/osresearch/eink-pri

@th Okay that is a huge difference. More than 3 times the power drain.

@momo it's even worse: more than 3000 times the power.

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