Last February 7 I attended a workshop at a the SokoTech in Barcelona to assemble my own Fenderino, the coolest guitar ever (my knowledge about guitars is very limited, so take this sentence with a grain of salt).
The guitar is actually a shield for the Arduino UNO and has been designed by the people at abierto.cc, an initiative aimed to provide open(-sourced) tools for educators, created amongst others, by David Cuartielles, co-founder of Arduino. The shield is inspired by the works of two very good friends of mine: Marc Sibila (@marcsibila) and Jordi Divins (@jdivins). You really should be following these guys, they are doing very special things as Instròniks.
Last December Itead Studio updated their Home Automation product line with a new and different product. The main difference is that it doesn’t have a relay and it’s mainly sensors and no actuator (if we don’t define a notifying LED as an actuator). The Sonoff SC is a sensor station that packs a DHT11 temperature and humidity sensor, a GM55 LDR, an electret microphone with an amplifier circuit and a Sharp GP2Y1010AU0F [Aliexpress] dust sensor in a fancy case that looks like it was originally meant for a speaker.
The device is packs an ESP8266 as expected and is compatible with the eWeLink app. But, such a collection of sensors, with 3 of them having analog interfaces, cannot be run from the single-ADC ESP8266 so Itead has thrown in a good old ATMega328P to drive the sensors and report the Espressif with the data.