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
@adorfer @h2owasser these e-ink price tags came on the slow train from china https://item.taobao.com/item.htm?spm=a1z0d.6639537.1997196601.37.73dd74841Tv7Nu&id=629479220903