This paper presents a multi-interface sensor network gateway architecture for home automation and other distributed monitoring applications. The gateway architecture provides multiple interfaces for supporting various application scenarios in home environments, ranging from on-site configuration to mobile access. A gateway prototype following the proposed architecture has been implemented. A testbed of a simple home automation network which includes the gateway prototype has also been created for testing its user interaction capabilities. Results of the demonstration experiment show that the proposed gateway gives good support to managing the home network from different user terminals and allows the users to better interact with the ambient environment.