When we first heard about it a few weeks ago, we knew the ESP8266 UART to WiFi module ... a truly affordable IoT sensor platform is created. If you have a few of these modules sitting around ...

The ESP8266 WiFi module is the latest ... you can simply connect any microcontroller to this module and start pushing data up to the Internet. Oh, it’s also being sold for $5 in quantity ...

Step forward YouTuber CNLohr, who appears to have developed a reasonably low-tech way to analyze the WiFi strength of any 3D space. Using just a WiFi module ... powered ESP8266 chip to ping ...