Open-source differential solar thermal controller. ESP32-S3 + ATmega32U4, 4× PT1000 sensing, TRIAC pump control, relay valves, W5500 Ethernet, RS-485, ESPHome. Designed for dual-tank hot water systems.
home-automation mqtt esp32 pcb open-hardware valve home-assistant pump ethernet atmega32u4 pcb-layout triac mosfet pcb-design esphome easyeda pt1000 solar-thermal differential-control
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Updated
Mar 29, 2026 - HTML