If you'd like to find more boards where you can flash your firmware, you can check out: https://openhardware.directory/devices/search/home-assistant-relay-humid

If you'd like to find more boards where you can flash your firmware, you can check out: https://openhardware.directory/devices/search/home-assistant-relay-humidity-water-sensor-boards https://openhardware.directory/devices/search/home-assistant...