Few devices have hit the hacker/maker word with quite as large a bang as the ESP8266. [Brian] first reported a new $5 WiFi module back in August. Since then there have been an explosion of awesome … ...

I have a PIC and a small signal relay running off of a 7805 and if I don’t disconnect them, my battery is dead in a couple of days. ... I want to connect esp8266 wifi module to arduino r3.