I made one-wheel balancing robot. This robot can be operated remotely from a smartphone using Blynk.
Controlling a robot vehicle movements using android phone sensors and Blynk app.
Control an external LED light from anywhere in the world using the ESP8266. The GPIO pin serves as an output source to the LED.
An ultimate tutorial for beginners on how to connect and use an ESP8266 via Arduino and program it to blink an LED using the Blynk app.