A novel electronic lock using optical Morse code based on the Internet of Things

摘要

In this work, a novel electronic lock that can encode and decode optical signals modulated using Morse code conventions, was developed to build a smart home security system based on Internet of Things (IoT). There are three topics of interest in this research: 1. optical Morse code encoder, 2. optical Morse code decoder, 3. cloud monitoring system. We take the advantage of the light-emitting components as the encoder, which are readily available in hand-held mobile devices (e.g. Smart phones), and photoresistors and a microcontroller as the decoder. By Wi-Fi transferring, even without a personal computer, real-time information about this lock can be uploaded to the cloud service platform, and helps users to ensure home safety on the remote monitoring system. From our experimental results, it has been demonstrated that our novel optical Morse code-based electronic lock is highly resistant to different illumination conditions in the work environment, all functions work well, including coding, emitting, receiving, decoding, uploading and cloud monitoring. However, it is worth noting that besides convenience and cost reduction due to unifying a smart phone and traditional key, as a consumer electronics our proposed system having a user-friendly operation interface, and is therefore suitable for users of all ages.