The purpose of this study is to optimize the use of student cards owned by students, to perform automatic student attendance and as a student's school exam card each semester. The method used is to integrate three main parts, namely the RFID System (cliet), Gateway System, and Server. The designed student card contains a UID (RFID Tag) which is read by an RFID reader every time students enter class for attendance and also when taking school exams. The RFID tag will be data that will be forwarded to Arduino Mega as a data processor and forwarded through the System Gateway to a server in the form of an orange pi so that it can be monitored by the operator. The test results for 5 times the test, the average response time for network access and getting the IP address from the router is 16.6 seconds, the average time the device responds to active student RFID card data from the database is 2.6 seconds. The average time of student's RFID card access to the device to the web server application is 3.8 seconds
AbstrakAir adalah elemen terkuat di bumi dan mahluk hidup di dunia sangat membutuhkan air manusia, tumbuhan dan hewan,air menjadi bahan pokok untuk kehidupan. Penggunaan pompa listrik untuk kebutuhan air pada umumnya memiliki kekurangan dimana pompa listrik menjadi rusak (terbakar) disebabkan kurang efisiennya penggunaan pompa yang hidup terus menerus dan tidak terkontrol. Di dalam penelitian ini penulis akan merancang alat pompa otomatis yang dapat mendeteksi level air, debit air dan dapat proteksi pompa listrik dari kerusakan apabila terjadi arus listrik lebih dan apabila air tidak mengalir dalam waktu tertentu. Dengan adanya alat ini mempermudah manusia untuk mengatur pemakaian air, mengetahui debit air yang masuk ke bak penampungan air dan apabila pompa air tersebut bermasalah, tanpa harus bersusah payah mencari kerusakan karena semua sudah dapat di lihat pada layar lcd. Dari hasil pengujian dapat disimpulkan bahwa alat tersebut sangat berguna untuk mengatur penggunaan air dengan mengatur batas level maksimum dan batas level minimum maka pompa akan hidup dan mati secara otomatis. Dan apabila karena kurang debit air yang mengalir pompa akan mati secara otomatis.Kata kunci : Mikrokontroller, Sensor PING, sensor debit air, sensor arus Abstract Water is the strongest element on earth and living things in the world desperately need water for humans, plants and animals, water is a staple for life. The use of electric pumps for water needs generally has a disadvantage where the electric pump becomes damaged due to the inefficient use of pumps which live continuously and are not controlled. In this study the author will design an automatic pump that can detect water levels, discharge water and can protect electric pumps from damage if there is more electric current and if the water does not flow in a certain time. With this tool makes it easier for humans to regulate water use, find out the water flow into the water reservoir and if the water pump is problematic, without having to bother looking for damage because everything can be seen on the LCD screen. From the test results it can be concluded that the tool is very useful for regulating water use by setting the maximum level limit and the minimum level limit, the pump will turn on and turn off automatically. And if due to lack of flowing water the pump will automatically shut down.
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