Which is how this ESP8266 sensor gadget from [Josef Adamčík] got its unique “folded over” look. The top panel is where the microcontroller and headers for various sensors live, the bottom ...

[Marc] and [Xavi] just wrote up a quick tutorial on how to turn the ESP8266 into a WiFi sensor platform that will relay the state of a GPIO pin to the Internet. If you’re going to replicate this ...

whereas that's what the ESP8266 is built around. It's basically designed to give Wi-Fi chops to whatever it's connected to, turning anything into a wireless sensor. For example, I've seen them ...