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In recent times, the volume of traffic congestion has been rapidly growing on roads. These days the necessity of having safe transportation and journey is essential. Thus, vehicle communication could be a possible solution to enhance safe transit. Vehicular communications provide a wide range of applications with different characteristics, namely vehicle and vehicle (V2V) communications. Every year, traffic accidents kill many people worldwide, and many people have been injured. V2V communication enables vehicles to communicate with each other to provide safety and convenience to drivers. Therefore, this paper explores a direction to develop a conceptual approach to V2V communication with HC-12, nRF24L01, and XBee. The study aims to analyse and evaluate the communication range that may contribute to the future road transportation system.

Penelitian ini bertujuan untuk merancang sistem pemantau kesehatan pasien berbasis jaringan sensor nirkabel yang berbiaya rendah. Teknik pengumpulan data dilakukan melalui studi literatur dan eksperimen prototipe di laboratorium software engineering STMIK KHARISMA Makassar. Untuk memantau kondisi kesehatan pasien secara berkala dari jarak jauh, prototipe sistem pemantau kesehatan berbasis jaringan sensor nirkabel yang dirancang dapat digunakan. Prototipe node sensor terdiri dari Arduino nano, modul komunikasi NRF24L01, sensor detak/pulse, sensor temperatur DS18B20, dan baterai sebagai sumber energi node. Sedangkan node sink/gateway disusun dari Arduino Uno, NRF24L01 dan modul timer RTC. Dari hasil evaluasi penginderaan node sensor diperoleh data detak jantung responden orang dewasa dengan kondisi sehat berkisar 62-71 BPM dan suhu tubuh sekitar 34-35 derajat Celcius. Rata-rata persentase perbedaan relatif terhadap pengukuran menggunakan alat manual atau tanpa menggunakan prototipe untuk sepuluh sampel data detak jantung yaitu 3,37%, dan data temperatur sebesar 2,48%.

Human beings have been substituted with robots in the performance of tedious and risky activities that human beings do not like or are incapable of performing due to the size of restrictions or the existence of the world, such as outer space or the ocean's depths. It has evolved into a low-cost, dependable, and inexpensive medium that can be used by both scientific societies and different industries for various surveys, mapping, and other underwater activities. In this study of underwater robotics power, we create an underwater robot that can fly in three dimensions: up-down, left-right, and front-back. The robot's motion is monitored by three motors, which also enable it to perform other tasks. Due to the fact that one-third of the world's population lives within 100 kilometers of the ocean, and that we are so focused on land and atmospheric problems that we ignore the seas, it is important to observe marine life and calculate the temperature and strength of light underwater. This application allows determining the appropriate temperature and intensity for living sea creatures to preserve their lives.

The limitations of developing high-tech communication systems cause the area of people who can use this service to be uneven. One technology that can be used for areas not yet reached by this high-tech communication service is to use radio communication technology. Today radio communication technology continues to develop and produce an increasingly limited frequency spectrum. One way to improve the efficient use of available frequency spectrums is the transition from analog technology to digital technology. A very significant benefit in the use of digital technology is to save the use of radio frequency spectrum bandwidth with signal compression techniques. One device that still uses analog technology is a handy talky (HT). In addition to the lack of frequency spectrum efficiency, HT technology still requires a radio station license (ISR) for its use. This experiment designed a two-way digital audio communication system that was transmitted using the NRF24L01 radio frequency transceiver module on the 2.4Ghz frequency. Analog input data from the microphone will be converted into digital data through the ADC (Analog to Digital Converter) process using a microcontroller and the digital data that will be sent is first digitally modulated using GFSK modulation then transmitted digitally. On the other hand data that already contains voice information received again by another NRF24L01 transceiver is received by the Arduino microcontroller and then formed into a PWM signal (pulse width modulation) and then released to the speaker. So the method of using digital transmission can produce efficiencies in the frequency spectrum.

Tema ovoga zadataka je bilo osmisliti meteorološku postaju koja kao zaslon ima e-ink (e-paper) zaslon vrlo niske potrošnje na kojem će se prikazivati vremenska prognoza i izmjereni podaci poput temperature zraka, relativne vlaţnosti zraka, tlak zraka i CO2 (eCO2) u zraku. Rad mora trošiti što je manje moguće energije uz pomoć low power reţima rada. Rad mora koristit WiFi mreţu za spajanje na Internet da bi se dohvatila vremenska prognoza. Osim toga, rad mora izmjerene podatke pohranjivati na neku vrstu memorije iz koje kasnije te podatke moţe dohvatiti i prikazati. Poţeljno je da se izmjereni podaci postave na Internet, te da ih se isto moţe po potrebi dohvatiti i prikazati. Dodana je i vanjska jedinica koja mjeri podatke poput temperature zraka, tlaka zraka, relativne vlaţnosti zraka, UV zraĉenje, koliĉinu svjetlosti, koliĉinu sunĉevog zraĉenja, brzinu vjetra i smjer vjetra. Podaci se šalju periodiĉno unutrašnjoj jedinici putem radio veze. Unutrašnja i vanjska jedinica koriste bateriju i solarni panel kao izvor energije. The task of his project was to make a weather station that uses e-ink (e-paper) display that has extremely low power consumption for displaying measured data such as air temperature, relative air humidity, atmospheric pressure and concentration of CO2 (eCO2) in the air. The device needs to use as little energy as possible by using low-power mode. The device also has to use WiFi technology in order to connect to the Internet and get the weather forecast data. Also, the device has to store measured data in some kind of memory device from where data can be fetched and displayed. Preferably, the device can send data to the Internet and also can get the same data if needed. There is also added outdoor unit device that measures data such as temperature, relative air humidity, atmospheric pressure, UV radiation, light intensity, irradiated solar power, wind speed and wind direction. Data is transmitted to the indoor unit by using RF communication. Both indoor and outdoor units are using batteries and solar panels as sources of power.

Robot adalah sebuah alat mekanik yang dapat melakukan tugas fisik baik menggunakan pengawasan dan kontrol manusia, atau program yang sudah tertanam dalam sebuah processor. Dalam suatu pengendalian sistem robot manual, sebagai bentuk komunikasi atau interaksi manusia dengan robot, maka perlu alat yang digunakan untuk komunikasi antara manusia dengan robot, salah satunya adalah telekomunikasi nirkabel. Modul nRF24L01 adalah transceiver chip tunggal yang khusus di desain untuk menyediakan pengaplikasian komunkasi wireless dengan daya yang sangat rendah. Penelitian ini menggunakan dua buah modul nRF24L01 dan dua buah mikrokontroler sebagai media komunikasi. Satu modul nRF24L01 berfungsi sebagai transmitter dan satu modul nRF24L01 sebagai receiver. Robot yang dibuat dapat dikendalikan melaui analog joystick PS2 yang terdapat pada bagian transmitter. Berdasarkan penelitian yang sudah dilakukan dapat diambil kesimpulan bahwa robot yang dibuat dapat dikendalikan menggunakan kontroler dengan jarak maksimal 300 meter.

Wireless technology is one of the most common technologies used in our day to day life. As wireless technology is very much easier to implement rather than wired, day by day its application is increasing. Through the continuous development of wireless communication technology it is now highly used in wireless equipment controlling. That is we can control our electronics and electrical equipments from a certain distant part. In this paper a multipurpose radio controlled car is designed with nRF24L01 wireless transceiver module, Arduino Uno R3 and DC motors to monitor risky areas. The RC vehicle is controlled by a distant controller or transmitter unit to move the vehicle to the risky location for monitoring.

Electrical energy can not be separated from the name kWh Meter, a tool used to measure and record the amount of electrical energy usage has a shortage of kWh meters can not be monitored remotely how much energy is used, so it is rather inconvenient for PLN officials to check the use of electricity for postpaid customers. This research was conducted to design a prototype of a wireless electrical energy transmission system and design a wireless electrical energy recording system using the NRF24L01 wireless transmitter module and the PZEM004T kWh meter module. The design in this study uses the principle of electromagnetic induction to transfer electrical energy at close range, while to transmit data, the authors use the NRF24L01 module. Besides, the authors use the PZEM004T module to measure various magnitudes. Based on the results of observations and measurements of the design of the tool, the authors found that the transmission of electrical energy using electromagnetic induction is not effective for longer distances because the energy lost in the air is getting bigger. So this technology needs to be further investigated. Besides, the measurement of electrical quantities using the PZEM module has a small difference (under 2%) with measurements using a multimeter, so it can be said that the measurement with the PZEM004T module is effective.

Most wearable intelligent biomedical sensors are battery-powered. The batteries are large and relatively heavy, adding to the volume of wearable sensors, especially when implanted. In addition, the batteries have limited capacity, requiring periodic charging, as well as a limited life, requiring potentially invasive replacement. This paper aims to design and implement a prototype energy harvesting technique based on wireless power transfer/magnetic resonator coupling (WPT/MRC) to overcome the battery power problem by supplying adequate power for a heart rate sensor. We optimized transfer power and efficiency at different distances between transmitter and receiver coils. The proposed MRC consists of three units: power, measurement, and monitoring. The power unit included transmitter and receiver coils. The measurement unit consisted of an Arduino Nano microcontroller, a heart rate sensor, and used the nRF24L01 wireless protocol. The experimental monitoring unit was supported by a laptop to monitor the heart rate measurement in real-time. Three coil topologies: spiral&ndash, spiral, spider&ndash, spider, and spiral&ndash, spider were implemented for testing. These topologies were examined to explore which would be the best for the application by providing the highest transfer power and efficiency. The spiral&ndash, spider topology achieved the highest transfer power and efficiency with 10 W at 87%, respectively over a 5 cm air gap between transmitter and receiver coils when a 200 Ω resistive load was considered. Whereas, the spider&ndash, spider topology accomplished 7 W and 93% transfer power and efficiency at the same airgap and resistive load. The proposed topologies were superior to previous studies in terms of transfer power, efficiency and distance.

Dewasa ini, sistem multi telemetri sudah banyak digunakan pada berbagai bidang. Multi telemetri merupakan susunan dari beberapa telemetri. Telemetri merupakan transmisi data dari jarak jauh yang memungkinkan pengaksesan data hasil pengukuran dari jarak/lokasi yang jauh dari tempat asal pengukuran terjadi. Pada penelitian ini dilakukan perancangan sistem multi telemetri untuk pengukuran suhu dan kelembaban pada prototype greenhouse. Pada proses sensing, sensor yang digunakan adalah sensor DHT 11 dan modul yang digunakan untuk pengiriman data adalah modul transceiver nRF24l01. Dalam penelitian, dilakukan uji performa kinerja dari Nrf24l01 sebagai modul transceiver apakah modul ini berfungsi dengan baik ketika melakukan pengiriman data. Pengujian pengiriman data dari Sensor node ke sink node dilakukan dengan 3 macam data rate yaitu 250Kbps, 1Mbps, dan 2Mbps. Pengujian ketika auto ACK digunakan dan tidak, Error ratio, missing handling, RTT, dan jarak jangkau juga dilakukan. Berdasarkan hasil pengujian didapatkan, penggunaan auto ACK akan membuat pengiriman data tidak stabil dan RTT semakin lama. Jika auto ACK dimatikan, maka data rate 2Mbps memiliki waktu pengiriman paling cepat dibandingkan data rate lainnya. Modul transceiver nrf24l01 sendiri memiliki jarak jangkau +-60 m. Untuk missing handling data, array dimanfaatkan untuk menyimpan data sementara.

U ovom radu je opisan sustav lociranja mobilnog uređaja unutar prostorije koristeći Bluetooth. Lociranje se vrši na osnovu udaljenosti od tri ili pet komercijalnih Bluetooth odašiljača ili odašiljača koji su napravljeni sklopom Arduino UNO-a i nRF24L01-a. Mobilni uređaj se nalazi na jednoj od točaka sjecišta kružnica dva odašiljača koja se nalazi unutar radijusa trećeg odašiljača. Lokacija mobilnog uređaja, kao i prikaz Bluetooth vidljivih uređaja se vrši u Android aplikaciji. This paper describes a system for indoor locating mobile devices using Bluetooth. The location is based on a distance of three or five commercial Bluetooth devices or devices made by the Arduino UNO and nRF24l01 assembly. The mobile device is located at one of the points of intersection of circles two of the transmitter located within the radius of the third transmitter. The location of mobile devices, as well as the display of Bluetooth visible devices, is done in Android application

This paper presents a wireless A/D acquisition system based on NRF24L01 and LABVIEW, which can be used to collect A/D data in the harsh environment of industrial production, but the staff can not easily approach or can not persist in the field for a long time. The system mainly by the wireless transmission module NRF24L01 and A/D data acquisition module, which A/D conversion part of the chip using STM32C8T6 own ADC. The computer uses LABVIEW as the host computer for data display and processing. The wireless A/D acquisition system has stable operation, long transmission distance, accurate data transmission, no loss of data, and can be adapted to various industrial control and measurement situations through measurement in different harsh environments of the factory.

“This is a post-peer-review, pre-copyedit version of an article published in.Lecture Notes in Electrical Engineering The final authenticated version is available online at:https://doi.org/10.1007/978-3-319-91334-6_4" Submitted by Paulo Torres (paulo.torres@ipcb.pt) on 2018-06-13T09:57:54Z No. of bitstreams: 1 FINAL_Error Correction Repetition Codes with Arduino and Raspberry PI _ SpringerLink.pdf: 1211432 bytes, checksum: 58430e675683f2cf9b0a116af66338aa (MD5) Approved for entry into archive by Lurdes Grilo (lurdesgrilo@ipcb.pt) on 2018-06-13T16:05:38Z (GMT) No. of bitstreams: 1 FINAL_Error Correction Repetition Codes with Arduino and Raspberry PI _ SpringerLink.pdf: 1211432 bytes, checksum: 58430e675683f2cf9b0a116af66338aa (MD5) Made available in DSpace on 2018-06-21T15:08:57Z (GMT). No. of bitstreams: 1 FINAL_Error Correction Repetition Codes with Arduino and Raspberry PI _ SpringerLink.pdf: 1211432 bytes, checksum: 58430e675683f2cf9b0a116af66338aa (MD5) Previous issue date: 2019 info:eu-repo/semantics/publishedVersion