Aquarium Automation using NodeMCU 12E

An automated aquarium control system that manages lights, filters, skimmers, and power heads with WiFi control, timers, and visual feedback.

Features

• Control 4 different aquarium components independently
• WiFi-enabled remote control via web interface
• Automatic timers with customizable schedules
• Real-time clock with auto time sync
• OLED display showing status and temperature
• OTA (Over The Air) firmware updates
• Power saver modes for equipment
• Visual feedback with WiFi signal strength indicators

Hardware Requirements

Main Components

• NodeMCU-ESP8266 Development Board ESP12E
• 4 Channel 5V Relay Board Module with Optocouplers
• DS3231 AT24C32 IIC Precision RTC
• 1.3 Inch I2C IIC 128x64 OLED Display Module (White)
• Appropriate power supplies for NodeMCU and relays

Pin Configuration

I2C Devices (DS3231 and OLED)

NodeMCU	Device
D1	SCL
D2	SDA
3.3V	VCC
GND	GND

Note: Both I2C devices share the same pins

4 Channel Relay Board

NodeMCU	Relay
D3	In1
D5	In2
D6	In3
D7	In4

Installation

1. Add ESP8266 board support:

   • In Arduino IDE: File → Preferences → Additional Boards Manager URLs
   • Add: http://arduino.esp8266.com/stable/package_esp8266com_index.json

2. Install Required Libraries:

   • DS3231 (from https://github.com/NorthernWidget/DS3231/releases)
   • Other libraries via Arduino IDE Library Manager:
     • Adafruit GFX
     • Adafruit SSD1306
     • ESP8266WiFi
     • NTPClient

3. Configure WiFi:

   • Open aqua_NODEMCU.ino
   • Update STASSID and STAPSK with your WiFi credentials

Important Notes

• Power Supply: Use separate power supplies for NodeMCU and relay board

  • Do not power relays from NodeMCU
  • Connect GND of both power supplies if using separate supplies

• I2C Troubleshooting: If experiencing I2C address conflicts:

  • Check device addresses
  • Adjust pull-up resistor values
  • Ensure proper power supply to I2C devices

Web Interface

Access the control panel by navigating to the NodeMCU's IP address in a web browser. Features:

• Manual/Auto mode switching
• Timer controls
• Power saver modes
• Temperature monitoring
• Time synchronization

Support

For questions or issues, please contact through: https://iotthings.pythonanywhere.com/contact

Disclaimer

This code is provided as-is without any warranty. Use at your own risk.

Images

Relay Board

DS3231 RTC

NodeMCU

OLED Display

Web Interface