Features

• Easy Home Automation
• Clever and cheap concept
• Easy programming with Blynk

Water Level Indicator

A simple NodeMCU Ultrasonic Water Level Indicator

1. Parts
2. Construction
3. Programming
4. App creation
5. 3D Casing

Parts

• NodeMCU V3
• HC-SR04
• Simple Switch
• Old Laptop battery pack or other Power source

Construction

In this Projekt we use the NodeMCU V3 because the cheap price and performance. You can use a smaller chips too, but i only had some NodeMCUs !

I made this simple Sketch with Fritzing:

For the Power i used some old Laptop battery pack, which works perfekt for me. For Powersaving you can set the NodeMCU in sleep mode!

Programming

• Install Driver (Download)
• Install Arduino IDE (Download)
• Add Board in Arduino Board Manager : https://arduino.esp8266.com/stable/package_esp8266com_index.json
• Select NodeMCU 0.9 as Board
• Upload Sketch

App creation

• Go to your App Store / Play Store and download Blynk
• Create a new Projekt
• Select ESP8266 as Board
• Enter the Auth Token in the Arduino Sketch
• Add a Gauge or something else and select V5 as pin.

3D Casing

Basic Sensor Casing

Comming soon ... (5-12 days)