Sep 1, 2016 A bag of wifi A bag of wifi arrived from aliexpress - it's all esp8266 based units called "wemos d1 mini". They're tiny little blue boards with a wifi chip that some clever opensource folks got working with Arduino. Written by: Brenda Wallace Wellington, Whanganui a Tara Brenda does many things. Lately it's mostly typing softwares, and soldering gadgets.