The wireless mouse has traditionally been an example of a device on a wireless Personal Area Network or PAN. For reasons of low data rate, short range, and requirement of long battery life, it has largely used proprietary wireless protocols or Bluetooth. However, with the increase in the number of wireless Human Interface Devices (HIDs), there has been a need to bring in a more versatile method – and one that also provides higher capacity to handle varied needs of the HIDs.
A wireless mouse that uses 802.11 Wi-Fi to communicate with the host laptop or desktop computer primarily uses the ad-hoc or IBSS mode of connection, with a strong move towards the use of the new Wi-Fi Direct protocol. Redpine’s 802.11n Wi-Fi module for the wireless mouse application – RSWC-201 provides an ideal platform for the implementation of a long battery life, high performance wireless mouse that supports Wi-Fi Direct. The module provides complete 802.11n client and Wi-Fi Dierct functionality with self-contained firmware and low power consumption. The module can be integrated with low power microcontroller to provide the dynamic control of the wireless link, taking into consideration the operational mode of the mouse – identifying user activity and arriving at the most optimal power state of the system. For a normal usage pattern in an office environment, a Wi-Fi mouse built using RSWC-201 would provide over one year of battery life.