Sign up at https://asksensors.com

Follow this tutorial for a step by step guide.

You will need:

• An Arduino Board, I'm using an Arduino Uno
• An ESP8266 WiFi module, I'm using an ESP-01
• A bread board and jumper wires

Connect the ESP-01 to the Arduino as shown in this tutorial.

• Ultrasonic TRIG pin to Arduino pin 9
• Ultrasonic ECHO pin to Arduino pin 8
• Ultrasonic VCC to Arduino 5V
• Ground to Ground

Download the code from the Asksensors Github page.
Decompress the code and change the following lines with your setting:

String ssid     = "............."; //Wifi SSID
String password = "............."; //Wifi Password
String apiKeyIn = "............."; // API Key

• Connect the Arduino USB to your computer
• Upload the code using Arduino IDE
• Open the serial terminal. you should see your Arduino connected to the WiFi and sending the measured distances to the AskSensors over HTTP.

• Return back to your AskSensors account.
• Open your sensor dashboard
• Add a new Graph the visualize the distance measurements sent by the Arduino.
• The image below shows how the data looks like using a Bar Graph