Since the launch of GPT-3.5, intelligent home assistant technology based on large language models (LLMs) has made significant progress. These intelligent home assistant frameworks, such as those based on high-performance LLMs like GPT-4, have greatly expanded their functional range and application scenarios by computing on the cloud, enriching user experience and diversification. In order to optimize the privacy and economy of data processing while maintaining the powerful functions of LLMs, we propose Harmony, a smart home assistant framework that uses a locally deployable small-scale LLM. Based on Llama3-8b, an open LLM that can be easily deployed on a consumer-grade PC, Harmony does not send any data to the internet during operation, ensuring local computation and privacy secured. Harmony based on Llama3-8b achieved competitive performance on our benchmark tests with the framework used in related work with GPT-4. In addition to solving the issues mentioned above, Harmony can also take actions according to the user and home status, even if the user does not issue a command. For example, when the user wants to wake up later than normal on the weekend, Harmony would open the curtains only when the user gets up or prepare the room when the user comes home without requiring user commands.
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