pH Meter using Arduino Uno and LCD Display
pH Meter using Arduino Uno pH scale is used to measure the acidity and basicity of a liquid. It can have readings ranging from 1-14 where 1 shows the most acidic liquid and 14 shows the most basic liquid. 7…
ESP8266 NodeMCU Relay Module – Control AC Appliances (Web Server)
Using a relay with the ESP8266 is a great way to control AC household appliances remotely. This tutorial explains how to control a relay module with the ESP8266 NodeMCU. We’ll take a look at how a relay module works, how…
ESP8266 DHT11/DHT22 Temperature and Humidity Web Server with Arduino IDE
In this project you’ll create a standalone web server with an ESP8266 that displays the temperature and humidity with a DHT11 or DHT22 sensor using the Arduino IDE. The web server you’ll build can be accessed with any device that…
ESP8266 NodeMCU with HC-SR04 Ultrasonic Sensor with Arduino IDE
This guide shows how to use the HC-SR04 Ultrasonic Sensor with the ESP8266 NodeMCU board using the Arduino core. The ultrasonic sensor uses sonar to determine the distance to an object. We’ll show you how to wire the sensor to…