Penelitian ini merancang suatu sistem pendeteksi ketersediaan slot parkir dengan pengaman data yang berbasis arduino. Pengaman data yang digunakan adalah dengan menggunakan metode kriptografi dalam bentuk algoritma hill cipher. Teknik algoritma hill cipher ini menggunakan sebuah matriks persegi sebagai kunci yang digunakan untuk melakukan enkripsi dan dekripsi. Cara kerja sistem ketersediaan slot parkir, dimulai dari proses perangkat lunak yang telah di rancang. Lalu sensor akan menginisialisasikan input output pada arduino mega. Selanjutnya, apabila pengendara pada pintu masuk melakukan tag kartu RFID, maka RFID Reader akan membaca. Sistem akanmulaimencarislot parkiryang masih tersedia. Lalu, jika ada slot parkir yang masih tersedia, maka pintu akan terbuka dan speaker akan berbunyi, dan menampilkan posisi parkir pada display. Katakunci: arduino mega, tag RFID, RFID reader, kriptografi hill cipher

This paper proposes a simple and low-cost landslide early detection system design. This system uses two sensors, namely the HC-SR04 ultrasonic sensor, to detect the soil movement and the YL-69 soil moisture sensor to detect soil moisture levels. Sensor data is processed using Arduino Uno. The soil movement and soil moisture data are sent to the receiving node using the LoRa communication system so that residents around locations with the potential for landslides can access data from the sensor nodes for free. This system is also equipped with an IoT system by using Thingspeak as an IoT platform. Based on the design and testing results, the LoRa system can work well at 250 meters in the channel with many buildings and trees. This research also designs an application to access sensor data via the Thingspeak web server using an Android device.

The processing of coffee before it can be drunk goes through a long process, namely harvesting coffee fruits that have matured either by machine or by hand, then processing coffee fruits and drying before they become spindle coffee. Before the roasting process, the coffee fruit is chosen first to be ripe in order to produce the last result of the best coffee process. After the coffee fruit is selected, the next process is stripping the ripe coffee fruit in order to speed up the post-harvest process of the coffee fruit. Harvesting will also affect the quality and taste of coffee, harvesting is usually done when the coffee fruit that has matured physiologically which is characterized by the color of the fruit skin becomes a red color. At the level of maturity of coffee fruits still occurs not simultaneously so that the harvesting process takes a long time. When the harvest period comes, the separation of coffee fruits is still mostly done manually by picking them in a simultaneous way. This simultaneous separation of coffee fruits makes the mixing of coffee fruits that are still raw, half-ripe, and already ripe, causing poor taste quality, that's why the author got the idea to make a tool that can make the coffee harvesting process simpler and more efficient, namely a coffee fruit separator tool based on maturity level aims to find out how the tool performs in detecting coffee fruits based on maturity levels and how performance  from a coffee fruit peeler. This tool can produce separate coffee fruits based on the degree of maturity, namely in the category of ripe, half-ripe and unripe. When coffee fruits that are still not separated between ripe, half-ripe and raw, are placed on the conveyor, the TCS3200 color sensor will detect the coffee fruit according to its color. The coffee fruit will be sorted automatically into a container that has been provided which is controlled by a servo motor that has been pre-programmed by Arduino. After the data from the coffee fruit separator has been read by the sensor, the Arduino will send the data to android via bluetooth connection. Furthermore, red coffee fruits or coffee fruits in the ripe category will proceed to the stripping stage. At the stripping stage, ripe coffee fruits will be peeled on a peeling machine controlled by a servo motor

Mountain is one of the tourist destination that are currently in great demand by various circles of society, specially for young people. This is evidenced by the increase in the mountaineering tourist visitour data that increase every years. The increase in public interest in mountaineering also leads to many cases of accidenct. That occur during mountainerring, such as the loss climbers in mountainousareas, the loss of climbers on mountain tracks, and other accidents that must immediately require emergency assistance. The difficult to find by giards and others search teams. Therefor, in this study we disigned an Eemergency Button tool for mountaineers designed to beable to perform the emergency call process when a person has an accident while in an inaccesible terrain such as mountains. It is integrated in the LoRa-based Multihop Communications System an Global Posiyioning System (GPS). Signals or data sently by climbers through the emergency button in the form of coordinate points of the location of climbers. The coordinates sent by the climbers will later be sent to the mountain guard post server which was previously via Relay, the coordinate data has been received will automatically be uploaded to thinkspeak so that it can be acces using the internet and converted into a google maps display from. It is hoped that this will make it easier to find the location of climbers accurately and quackly.

The Salah Nama island is located in the middle of the Musi River waters, located in Mariana Ilir Village, Banyuasin 1 District, Banyuasin Regency, South Sumatra Province. The people of Salah Nama Island have UMKM engaged in culinary, animal husbandry and agriculture. The current obstacle that is still being faced is the marketing of UMKM products. Coupled with access to locations that are still quite difficult to reach. Lack of promotion due to lack of marketing strategy is a major problem. Globalization that continues to grow is also marked by the number of existing social media. Today, social media has become the center of public attention that can be used as a means of product marketing. The lack of information and knowledge about the use of the internet and social media in the people of Salah Nama Island is one of the causes of the non-optimal use of existing social media. This service program is carried out with the aim of training the community in using social media so that they can increase the marketing of UMKM products on Salah Nama Island. The method used is by conducting counseling, practical assistance, to discussion. From the stages of service that have been carried out, the community understands how to create social media accounts and understands the use of social media in various aspects, not only as a means of communication. So that people can use social media to improve the economy.Keywords: marketing; micro small medium enterprises; salah nama island; social mediaAbstrak: Pulau salah nama berada di tengah perairan Sungai Musi, berlokasi di Kelurahan  Mariana Ilir, Kecamatan Banyuasin 1, Kabupaten Banyuasin, Propinsi Sumatera Selatan. Masyarakat Pulau Salah Nama memiliki UMKM yang bergerak dibidang kuliner, peternakan dan pertanian. Kendala saat ini yang masih dihadapi ialah bidang pemasaran produk UMKM. Ditambah dengan akses lokasi yang masih cukup sulit dijangkau. Kurangnya promosi akibat minimnya strategi pemasaran menjadi permasalahan utama. Globalisasi yang terus berkembang juga ditandai dengan banyaknya media sosial yang ada. Dewasa ini media sosial menjadi pusat perhatian publik yang dapat dimanfaatkan untuk menjadi sarana pemasaran produk.  Minimnya informasi dan pengetahuan mengenai penggunaan internet dan media sosial pada masyarakat Pulau Salah Nama menjadi salah satu penyebab belum optimalnya penggunaan  media sosial yang ada. Program pengabdian ini dilaksanakan dengan tujuan untuk melatih  masyarakat dalam menggunaan media sosial sehingga dapat meningkatkan pemasaran produk UMKM di Pulau Salah Nama. Metode yang digunakan yaitu dengan melakukan penyuluhan, pendampingan praktik, hingga diskusi. Dari tahapan pengabdian yang sudah dilaksanakan masyarakat menjadi paham cara pembuatan akun media sosial dan mengerti kegunaan media sosial dalam berbagai aspek tidak hanya sebagai sarana komunikasi. Sehingga  masyarakat dapat memanfaatkan media sosial untuk meningkatkan perekonomian.Kata kunci: media sosial; pemasaran; pulau salah nama; usaha mikro kecil menengah