Greenhouse IoT

Greenhouse monitoring system based on ESP8266

Objectives

Development of a greenhouse monitoring system:

• Multiple data accessing for easy reading
  • Display
  • AP mode dashboard
  • STA mode dashboard
  • [Latter]: MQTT data provider
• Simple dashboard, configure wifi, board name, reading interval
• Sensors
  • Air temperature and humidity - DHT11
  • Soil moisture sensor
    • Allow to calibrate sensor through the web interface
• Develop clean and modular code (OOP)
  • Will be merged later for the esp_manager boiler plate project

Web FrontEnd

• Made with Material Design Lite
  • Using HTML and pure JavaScript
  • Obsolete but with a very small size and easy to use across different devices
  • Focus on simple usage
    • Data visualization
    • Wifi Configuration
    • Device Configuration

Schematics and List of Materials

Label	Part Type	Properties
C1	Capacitor Polarized	Electrolytic 10uf 25v
R1-R4	10kΩ Resistor	Tolerance ±5%, Resistance 10kΩ
R5	470Ω Resistor	Tolerance ±5%, Resistance 470Ω
R6	100kΩ Resistor	Tolerance ±5%, Resistance 100kΩ
R5	220kΩ Resistor	Tolerance ±5%, Resistance 220kΩ
U1	ESP8266 WiFi Module	ESP12F
U2	DHT11	Temperature and humidity sensor
U3	SSD1306	0.96 in OLED I2C Display 128x64
U4	HW-103	Soil Moisture Sensor
S1	Momentary Switch	Tactile Switch

Libraries

• ESPAsyncTCP - Base library for ESPAsyncWebServer.
• ESPAsyncWebServer - An Async Web Server implementation for the ESP8266.
• Adafruit DHT11 Air Temperature and Humidity Sensor
• Adafruit SSD1306 Display

References

• Capacitive soil moisture
• Weather station
• DHT11/22 Sensor
• SSD1306 OLED Display
• Display Generator
• Class Inheritance