TannerNelson16 / sprinkler_controller

ESP32 driven sprinkler controller using micropython with web UI, scheduling, and MQTT integration for home assistant.

Introduction:

Smart irrigation controllers are overpriced and lack customizability so I set out to develop a simple and easy to use solution that is also robust and reliable.

Components used:

• ESP32 dev board - https://www.amazon.com/gp/product/B0C7C2HQ7P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
• 16 channel relay board - https://www.amazon.com/gp/product/B07Y2X4F77/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
• Step Down Buck converter - https://www.amazon.com/gp/product/B08B3T9DX4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
• Amazon Fire HD 8" Tablet - https://www.amazon.com/gp/product/B07952VWF2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
• 3d printed container
• 24v transformer

Web UI:

Installation:

FOR LINUX:

First install the micropython environment on your ESP32. Here's the official documentation: https://docs.micropython.org/en/latest/esp32/tutorial/intro.html

For the condensed version:

• Download micropython here: https://micropython.org/resources/firmware/ESP32_GENERIC-20240222-v1.22.2.bin
• Run the following command in the ubuntu terminal:

pip install esptool

• From the folder where the micropython file is located, run the following commands:

esptool.py --chip esp32 --port /dev/ttyUSB0 erase_flash
esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 460800 write_flash -z 0x1000 ESP32_GENERIC-20240222-v1.22.2.bin

Once micropython has been successfully installed on the board, download the files in the repository navigate to it's folder.

Open the controller.py file using vi, nano, or another editor of your choice and change the ssid, wifi password, mqtt broker ip address, mqtt username, and mqtt password.

Once this is complete, save the file and run the following commands:

pip install adafruit-ampy
ampy --port /dev/ttyUSB0 put index.html
ampy --port /dev/ttyUSB0 put scheduler.html
ampy --port /dev/ttyUSB0  put microdot.py
ampy --port /dev/ttyUSB0  put microdot_asyncio.py
ampy --port /dev/ttyUSB0  put controller.py /main.py

Reboot and navigate to the board's IP address from a web browser. You should also see the Zones auto populate in your home assistant instance if applicable.

NOTE: If the network is unavailable, the ESP32 will first try to connect without the MQTT integration. If the network is still causing errors, the ESP32 will generate an AP to allow for control of the sprinkler system. This can be accessed by connecting to the SSID: intellidwellSC and navigating to 192.168.4.1

Enclosure:

Main Box: https://a360.co/3JPQwDQ

Tablet Tray: https://a360.co/3wzbLN

Tablet Cover: https://a360.co/4asd20F

Assembly: