![]() ![]() The platform is pre-programmed to work with each set of Panic Button, Main Unit, and Range Extender so that a unique connection to the service call center for each service user is immediately enabled when the service user plugs in the Main Unit to power. In addition, the SoC’s +8 dBm TX power provides extended coverage for the emergency alert system.Ī web-based processing platform designed to handle voice message transmissions is used at the service call center. The nRF52840 SoC acts as the system host on the Main Unit, enabling wireless communication with the Panic Button and Range Extender, as well as directing data to the backend server for processing. The device eliminates the possibility of lost or missed signals from the Panic Button wherever and whenever it is triggered by service users in their homes. The Range Extender is a plug-and-go device designed to extend Bluetooth LE distance to flexibly address various problems that disrupt connectivity in enclosed indoor areas, such as blind spots. The Main Unit supports up to eight Bluetooth LE connections with either the Panic Button or Range Extender at one-second response times. Once installed, it enables calls over the network to the service call center when manually triggered by buttons or receiving Bluetooth LE signals from the Panic Button. The Main Unit is a cellular gateway performing as a network access point that works with the multiple communication protocols of Hong Kong’s four network providers (CSL, SmarTone, China Mobile, and 3HK). ![]() The Panic Button is also IP65, IP66, and IP68 dust- and waterproof-rated and can be used indoors in bathrooms and kitchens. The device provides Bluetooth 5 Long Range connectivity at up to 200 meters line-of-sight, which is ample coverage for the average Hong Kong apartment. It has an easy-to-click SOS button that instantly connects service users to the service call center following a one-button trigger to the Main Unit. ![]() The Panic Button is designed to be wearable for portability around the home. All three devices use the nRF52840 SoC’s Long Range technology to improve radio sensitivity and, in turn, range. The WPEL comprises three hardware elements: The ‘Panic Button’, which integrates the Nordic Bluetooth 5.3/Bluetooth LE nRF52840 SoC, and the ‘Main Unit’ and ‘Range Extender’, which integrate the nRF52840 SoC-based proprietary, pre-certified SGW1111 and SGW1110 modules respectively. The new wireless solution eliminates the need and cost for a fixed landline and makes it a viable option for a broader range of service users. This service call center is operated around-the-clock by the SCHSA, Hong Kong’s largest emergency assistance service provider that supports and delivers integrated care to over 400,000 accumulated senior citizens. Always-on connectionĪ revamp of the SCHSA’s wired landline solution, the WPEL provides service users with a guaranteed, always-on connection to the ‘Care-on-Call Service Call Centre’. Installed in the homes of service users, the system is designed to support senior citizens who live alone and individuals who are unable to care for themselves and whose caregivers may not always be available. WPEL is an indoor Bluetooth® LE/LTE Cat 1 emergency alert system. Hong Kong-based IoT technology solutions company, SG Wireless, has partnered with the local non-profit charitable organization Senior Citizen Home Safety Association (SCHSA), to develop the ‘Wireless Personal Emergency Link’ (WPEL). SG Wireless uses nRF52840 for Bluetooth LE connectivity for panic button operation.
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