Jeff-I Firmware & Support Center
Download the latest firmware updates and technical documentation to keep your Jeff-I controller at peak performance.
Version 1.3 - Major Update [March 2026]
- Zero-Config Integration: Introducing native MQTT Auto-Discovery for instant setup.
- 6 Dedicated Entities: Real-time monitoring and control for Water Temp, Main Pump, Heater, CO2, Drain Valve, and Fill Valve.
- 100% Local Control: No cloud dependency, ensuring millisecond response times even offline.
The core system logic for Jeff-I V1.3.
Contains the Web UI, Home Assistant discovery configs, and icons.
Installation Note: To ensure all V1.3 features (including the new Home Assistant entities) work correctly, you MUST upload both files via the Web UI’s update page.
I. Upload firmware.bin first and wait for the device to reboot.
II. Upload littlefs.bin to refresh the Web interface and MQTT configs.
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