irrigation

Hardware and firmware for an irrigation controller on an ESP32.

Designed to control 24VAC solenoid valves.

Schematic

PCB

• PCB has been designed in EasyEDA Standard.
• Board size is 140 mm x 70 mm.
• Includes M4 mounting holes.
• 2 layer board.

Hardware

Use the Gerber files in hardware to print a PCB from your favourite supplier and solder components to the board.

See hardware/README.md for more information.

Firmware

Flash the ESP32-C3 using the following steps:

python3 -m venv irrigation
source irrigation/bin/activate
pip3 install esptool esphome
esptool.py --port /dev/ttyACM0 erase_flash
esphome run irrigation.yaml

The firmware uses ESPHome which has default support for Home Assistant.

Usage

Initial setup:

• Connect power to the device.
• Connect to the WiFi network Irrigation Controller and enter password irrigation.
• Open the web browser to 192.168.4.1 and connect to your WiFi network.
• Find the IP address of the ESP32-C3 from your WiFi router devices list. Alternatively run sudo nmap -sP $(hostname -I | awk '{print $1}')/24.
• Assign a static IP to the ESP32-C3 from WiFi router settings.

Operation:

• Navigate to the static IP assigned in the initial setup.
• Use the ESPHome web interface to control solenoids.

Home Assistant setup:

• In Home Assistant navigate to Settings, Devices and Services, Add Integration, ESPHome.
• Add the host as the static IP assigned in the initial setup, and leave the port as 6053.
• Enter the encryption key found in irrigation.yaml.
• The ESPHome device will expose the 8 solenoid switch entities.

Future Work

• Add pictures of installed controller.
• Design 3D printed case.

License

MIT