I started with ESP some months ago and built a wifi temperature sensor (the "Hello world" for an ESP).
Some days ago I noted kickstarter project combining the ESP8266 with an Atmel ATSAMD21. It's Arduino compatible. seems to be a very small but powerful platform for lot of IoT hacks.
If you are interested
visit the kickstarter page: https://www.kickstarter.com/projects/kr ... with-wifi/
or the wino-board homepage: http://www.wino-board.com/index.php/en/
Beroot
To solve problems under linux: be root!