Result:

Goal:

The Hunter X-Core sprinkler controller has a 1-Wire interface via which individual zones and programmes can be started or stopped using a proprietary protocol. This interface is used to connect a receiver for the Hunter radio remote control. The aim of the project was to be able to control the system much more cost-effectively via a website.

Implementation:

Fortunately, there were already some similar projects, so this is just a combination of Rui Santos' ESP8266 Relay Module Web Server project and Sebastien's OpenSprinkler-Firmware-Hunter projects. You can proceed as follows:

• Buy an ESP8266 or ESP32 NodeMCU module and install the Arduino IDE on your PC. (max. 10€)
• Follow this video. on how to install the Board Manager if you are using an ESP8266.
• I have chosen 'Generic ESP8266 Module' under Tools/Board/ESP8266 Boards.
• Download the archive below and unpack it in a folder of your choice.
• Open the file hunter_wifi_remote.ino in the Arduino IDE. The hunter.h and hunter.cpp files should open automatically in two additional tabs.
• Follow the instructions in the hunter_wifi_remote.ino file.

hunter_wifi_remote.zip

Credits:

Thanks to Damien Mascord who adapted the project to version v3.0.2 of the ESP8266 board manager. He also points to the project of Ecodina.

Demo assembly:

When setting up, make sure that the operating voltage of the ESP and the Hunter X-Core are electrically isolated, as the positive terminal of the ESP must be connected to an AC terminal on the Hunter X-Core. Under no circumstances should the grounds of the ESP and the Hunter X-Core be connected to each other.
If the ESP is supplied with voltage via a commercially available USB charger, the galvanic isolation is given in the standard case.

Wiring:

Prototype with power supply over the Hunter X-Core:

Disclaimer:

This project requires specialist knowledge. Reproduction at your own risk and liability.