Features

Easy Home Automation
Clever and cheap concept
Easy programming with Blynk

Water Level Indicator

A simple NodeMCU Ultrasonic Water Level Indicator

Parts
Construction
Programming
App creation
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)