How does it work?

The ESP8266 board (D1 mini) connects to the wifi your wifi network and the Blynk app. When a Botton on the app is actioned, the ESP sends it to the servo motor. The LM7805 transistor is used to convert the 9 volts from the battery to a useable 5 volts. All of the parts used are widely available for some cheap prices.

Building and Programming:

Building the Blynk app:

Start a new project on the Blynk App.

Name it Remote Servo Control, choose ESP8266 as the device and choose the connection type via WiFi

An email will arrive with your Auth token when you create your project. Save it, you'll need it later.

Add a Slider to the project.

Set the output of the Slider to Virtual 1 (V1) and change the 1023 value to 180.

Add 2 buttons to the project

Name it Position 1 and set the output as Virtual 2 (V2)

Name the other button Position 2 and set the output as Virtual 3 (V3)

And that's basically it for the App.

The code:

We need to change some things to make it work:

char auth[] = "Blynk Auth Token";

Paste your Auth code inside the brackets

char ssid[] = "your ssid";

Replace "your ssid" and add your wifi network name

char pass[] = "wifi password";

Replace "wifi password" and add your networks password.

And that's it! Now you're ready to turn on and off anything anywhere in your house.