email have sent to you.
the best solution is use one KC868-Server add KC86H32BS+ KC868-E16.
so that your home assistant can install on the KC868-Server, KC868-H32BS for extend output, use E16 when relay is bad, it easy to replace and repaire, because E16's relay is removable.
old controller no new firmware for update for MQTT, because chip no memory space for update.
the best solution is use one KC868-Server add KC86H32BS+ KC868-E16.
so that your home assistant can install on the KC868-Server, KC868-H32BS for extend output, use E16 when relay is bad, it easy to replace and repaire, because E16's relay is removable.
old controller no new firmware for update for MQTT, because chip no memory space for update.