Such a system integrates the smart phone that is indispensable in modern times, with the door access system. Therefore, the future development trend of the household security industry is to develop a low-cost wireless digital door access system that has high convenience, high security, and high transmission speed.īased on the above considerations, we proposed a brand-new optical Morse code-based electronic locking system by referring to the visible light communication (VLC) Technology, Light Fidelity (Li-Fi), with the bandwidth 10,000 times higher than that of Wi-Fi.
The biometric systems require extremely high sensor resolution, thereby increasing the product cost and restricting their popularization.
Moreover, although there are face, fingerprint, speech and iris recognition systems that differentiate individuals by their unique biometrics, its accuracy is strongly affected by aging, injuries, illness and other uncertain factors that change these features. Therefore, it is not as convenient as the system that we propose here which utilizes common hand-held devices as electronic locks. Nonetheless, the virtual RFID card is an extra accessory to the user and is prone to being lost or embezzled. In recent years, governments, schools, companies and even large communities have started to use the radio frequency identification (RFID) instead. With urbanization and diverse criminal types, its efficacy is being challenged. The old-fashioned key-and-lock is still widely used in the home security system today. Furthermore, besides the convenience and cost reduction, by incorporating traditional keys into smart phones, as a consumer electronics, our proposed system is suitable for users of all ages because of a user-friendly operation interface. That means that it is highly resistant to different illumination conditions in the work environment, and therefore all functions, including coding, emitting, receiving, decoding, uploading and cloud monitoring, can work well. By using the ambient light sensor and fuzzy controller in this novel optical Morse code-based electronic lock, experimental results show that the reliability of this system is much improved from 65% to 100%. 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. We take 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.
#MORSE DECODER CIRCUIT CODE#
There are five topics of interest in this research: (1) optical Morse code encoder (2) optical Morse code decoder (3) ambient light sensor circuit (4) fuzzy controller (5) cloud monitoring system. If it is still not working, upload with pic and I'll help you troubleshoot further.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 the Internet of Things (IoT). Try checking the connections and code again. The first one is a circuit sketch, second one is a circuit diagram and the third one is an actual photograph. Also, I used a generic board from China, which didn't even have the manufacturer's name. The technical specs of both the Elegoo board and the Arduino board will be same, the only difference being it is manufactured by different companies. Using an Elegoo Uno R3 should be fine as Arduino is opens source.
#MORSE DECODER CIRCUIT DOWNLOAD#
Also did you directly download and use the file 'Morse_code_decoder.ino' or did you type the code manually in your compiler. I will be able to help you better with that. If possible, upload a pic of the circuit. There must be some issue with either the circuit, the code or in worse case the board.
When you press the reset button all I/Os are triggered so the LED must be lighting because of that. Static String letters = code = "" //reset code to blank string numberFound = false //reset to search for numbers again. Return '-' //if button press more than 0.6sec, it is a dashįunction for converting dots and dashes into alphabet: Return '.' //if button press less than 0.6sec, it is a dot If (signal_len > 50) //to account for switch debouncingĬode += readio() //function to read dot or dash Signal_len = t2 - t1 //time for which button is pressed Main Loop for running program and decoding:ĭigitalWrite(ledPin, HIGH) //LED on while button pressedĭigitalWrite(ledPin, LOW) //LED off on button release PinMode(inputPin, INPUT_PULLUP) //internal pullup resistor is used to simplify the circuit
#MORSE DECODER CIRCUIT SERIAL#
Setup the serial connection and I/O pins: String code = "" //string in which one alphabet is stored Unsigned long signal_len,t1,t2 //time for which button is pressed int inputPin = 2 //input pin for push button
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