kitten playing with trackers
the third one, also nrf51822, this one is a bit weird... two button, and it's clearly a devboard embedded in a larger PCB. also CR2477I found sort of a pinout, and it has plenty of gpio available... the case is weird though, no easy way of attaching it to anything, although it has some holes in it that could be used
a.aliexpress.com/_EGPL3pO
