Always be probing.
Hello, e-ink price tag! https://github.com/osresearch/eink-pricetags
the board uses less than 10uA at idle with the radio turned off and 5mA while updating the e-ink display.
@th Are they battery powered? I thought they just kept the same display with no power.
@FritzAdalis the price tags have two CR2450 batteries in parallel and wakeup occasionally to receive new images over the 2.5GHz radio.
(void*)