Hardware components | ||||||
 |
| × | 1 | |||
Software apps and online services | ||||||
 |
| |||||
SprinklerBoy is your next-generation smart irrigation controller built around the powerful ESP32 and equipped with native Ethernet connectivity. Whether you're automating a home garden, greenhouse, or a professional irrigation system, SprinklerBoy delivers robust performance, high expandability, and complete control — right out of the box.
💡 Key FeaturesSprinklerBoy is a fully integrated, smart irrigation control system based on the ESP32-WROOM-32UE with native Ethernet LAN8720A support. Designed for reliable, flexible, and efficient irrigation, the project supports:
- Up to 8 AC-controlled sprinkler valves
- Multiple digital and analog inputs
- I2C-based expansion
- Robust surge protection
- ESP32 MCU: Wi-Fi + Ethernet (LAN8720A PHY) with external antenna support
- 8 Triac Outputs: Control up to 8 AC sprinkler valves via opto-isolated TRIACs (MAC97A8)
Input Protection:
- Surge protection (SMBJ43CA)
- Flyback diodes (SS34)
- Fuses on both logic and power lines
- Input Protection:Surge protection (SMBJ43CA)Flyback diodes (SS34)Fuses on both logic and power lines
Multi-Input Capability:
- 1 dry-contact input (e.g., rain sensor, external switches)
- 8 local physical push buttons
- 1 I2C analog keypad input (via ADS1115)
- I2C temperature and rain sensors
- Multi-Input Capability:1 dry-contact input (e.g., rain sensor, external switches)8 local physical push buttons1 I2C analog keypad input (via ADS1115)I2C temperature and rain sensors
- Ethernet (LAN8720A) with RJ45 magjack and status LEDs
- USB Type-C + CH340C for programming and serial debug
- I2C bus for additional peripherals and sensors
- Single 5V DC input (external or USB-powered)
- On-board 3.3V and 5V regulators using LDO and switching converters (BL1117-33, XL1509)
Four independent schematic blocks:
- Controller Core (ESP32)
- Ethernet Interface
- Valve Output & Power Supply
- Input Interface Board
🛠️ PCB ready: Designed in EasyEDA and optimized for JLCPCB assembly
🛠️ PCB ready: Designed in EasyEDA and optimized for JLCPCB assembly
- Home garden irrigation automation
- Greenhouse or agricultural control systems
- Integration with home automation platforms (via MQTT, HTTP, Modbus, etc.)
This ESPHome-based YAML configuration powers the SprinklerBoy smart irrigation controller, offering full integration with sensors, display, and networking.
The file given it's just an overall example, it have to be adapted to your needs.
The file given it's just an overall example, it have to be adapted to your needs.🔌 Connectivity & Core
ESP32 platform with:
- Native Ethernet via
esp32_ethernetusing LAN8720 - Optional fallback Wi-Fi configuration
- ESP32 platform with:Native Ethernet via
esp32_ethernetusing LAN8720Optional fallback Wi-Fi configuration
MQTT Client:
- Publishes and subscribes to irrigation status, commands, schedules, and system variables
- Allows full control from platforms like Home Assistant, OpenHAB, or Node-RED
- MQTT Client:Publishes and subscribes to irrigation status, commands, schedules, and system variablesAllows full control from platforms like Home Assistant, OpenHAB, or Node-RED
- 8 irrigation valves controlled via GPIOs (mapped to hardware TRIACs)
Automatic sequential irrigation:
- Configurable runtime per valve
- Optional skipping of disabled valves
- 5-second pause between valve changes
- Automatic sequential irrigation:Configurable runtime per valveOptional skipping of disabled valves5-second pause between valve changes
- Manual mode via MQTT or physical button
Weekly scheduler:
- Enable/disable irrigation per day (Mon–Sun)
- Each day configurable independently
- Weekly scheduler:Enable/disable irrigation per day (Mon–Sun)Each day configurable independently
OLED Display (SSD1306 128x64):
- Real-time status updates (active valve, countdown, errors)
- Menu navigation using 3 physical buttons (UP, DOWN, OK)
Inactivity timeout returns to standby screen showing:
- Current time/date
- Connection status (ETH or fallback)
- Valve enable status summary
- Inactivity timeout returns to standby screen showing:Current time/dateConnection status (ETH or fallback)Valve enable status summary
- OLED Display (SSD1306 128x64):Real-time status updates (active valve, countdown, errors)Menu navigation using 3 physical buttons (UP, DOWN, OK)Inactivity timeout returns to standby screen showing:Current time/dateConnection status (ETH or fallback)Valve enable status summary
- Valve status toggle
- Daily scheduling per valve
- Irrigation enable/disable
- Display mode toggle (active screen or standby)
Rain sensor (digital, GPIO16):When rain is detected, automatic irrigation is inhibited
- Rain sensor (digital, GPIO16):When rain is detected, automatic irrigation is inhibited
External temperature sensor (via MQTT or physical):Reserved for potential future logic (e.g., frost prevention)
- External temperature sensor (via MQTT or physical):Reserved for potential future logic (e.g., frost prevention)
- 3 analog buttons via ADS1115 (menu navigation)
8 digital dry-contact inputs (opto-isolated):
- Usable for triggers, overrides, manual start, etc.
- 8 digital dry-contact inputs (opto-isolated):Usable for triggers, overrides, manual start, etc.
Includes topics for:
- Starting/stopping irrigation
- Enabling/disabling individual valves
- Scheduling per day
Reading back system status:
- Active valve
- Remaining time
- Rain detection
- Connection status
- Errors
- Reading back system status:Active valveRemaining timeRain detectionConnection statusErrors
- Prevents irrigation when rain is detected
- Watchdog logic to ensure no valve stays stuck
- Auto-reset irrigation cycle in case of error
This project is provided for educational purposes only.
This project is provided for educational purposes only.
The author(s) of this repository do not take any responsibility for:
- Incorrect use of the design or schematics
- Damage to equipment, persons, or property
- Installation in unsafe or non-compliant environments
Any implementation of this project in real-world systems should be done under the responsibility of a qualified professional, and in compliance with local regulations and safety standards.
By using this material, you acknowledge that it is offered as-is, without warranty of any kind, and you agree to use it at your own risk.
Comments