Arduino monitor water level with NodeMCU ESP8266 This project will check water level in tank if water level < 20% pump will start and when water level > 80% pump will stop with HC-SR04 ultrasonic sensor, show data in 0.96 inch OLED Display and send distance to firebase realtime database for React dash board in next project.
Dashbased for monitor by Reacjs: https://github.com/kreangsak-project-sharing/react-dashboard-water-level
Arduino core for ESP8266 WiFi chip: https://github.com/esp8266/Arduino
Firebase Realtime Database Arduino Library for ESP8266 and RP2040 Pico: https://github.com/mobizt/Firebase-ESP8266
Adafruit_SSD1306: https://github.com/adafruit/Adafruit_SSD1306
Need to change code before use #define FIREBASE_HOST "Firebase database URL"
#define FIREBASE_AUTH "Database Secrets"
#define WIFI_SSID "Wifi Username"
#define WIFI_PASSWORD "Wifi Password"
IPAddress ip(192, 168, 0, 100); //Wifi IPAddress
int maxDist = 1000; // Tank Height or full water level you need in millimeters
Pin wiring for LED & Relay Pump
LED & Relay
NodeMCU ESP8266
Remark
LED Wifi Status
D3
Check wifi connection
LED Pump Working
D4
Check pump working
LED Pump Stop
D5
Check pump stop
Pump Start for Relay
D6
Replace this to relay
HC-SR04 Pin
NodeMCU ESP8266
VCC
VU
TRIG
D7
ECHO
D8
GND
GND
Pin wiring for 0.96 inch OLED Display
0.96 inch OLED Display
NodeMCU ESP8266
GND
GND
VDD
3V
SCK
GPIO 5 (D1)
SDA
GPIO 4 (D2)
Result in firebase realtime database
Can change pumpstartmanual state to ture for start pump when water level < 80%
Can change pumpstopmanual state to ture for stop pump
Can change resetboard state to ture for restart board
