Serial communications with RS232. One of the oldest and most widely spread communication methods in computer world. The way this type of communication can be performed is pretty well defined in standards. With one exception. The standards show the use of DTE / DCE communication, the way a computer should communicate with a peripheral device like a modem. For your information, DTE means data terminal equipment (computers etc.) where DCE is the abbreviation of data communication equipment (modems). In history, practical solutions were developed to let two computers talk with each other using a null modem serial communication line.
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In most situations, the original modem signal lines are reused to perform some sort of handshaking. Handshaking can increase the maximum allowed communication speed because it gives the computers the ability to control the flow of information. High amounts of incomming data is allowed if the computer is capable to handle it, but not if it is busy performing other tasks. If no flow control is implemented in the null modem connection, communication is only possible at speeds at which it is sure the receiving side can handle the amount information even under worst case conditions.1. Loopback is a method of testing the RS232 connector and interface circuitry to ensure it is functioning correctly, that is, in layman’s jargon – it ain’t broke!
If communication fails to occur between two machines the question that immediately arises is – which end is broken? In the worst case both ends could even be broken in which case ritual suicide may be the best solution. Loopback works by testing each end of the connection independently.
![]() Komunikasi Serial Mikrokontroler Dengan Pc Windows 10
Data is sent and received on the same RS232 connector – which may be either DB9 or DB25. The test normally consists of using some program to transmit data. The program then checks to ensure exactly the same data was received. Loopback testing gives you a binary result – it works, in which case the end under test is good, or it does not, in which case the end under test is broken. Aplikasi pada GNU/Linux yang terakhir yang saya pakai adalah minicom ( $sudo apt-get install minicom). Aplikasi ini menurut saya agak unik dan “paling sederhana” tampilannya. Untuk menguji dengan loopback terminal minicom dipergunakan seperti notepad atau gedit.
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Jika sistem komunikasi serial pada komputer yang di- loopback berfungsi baik maka karakter dari key yang ditekan pada keyboard akan muncul di layar monitor. Jika loopback dongle dilepas atau sistem serial rusak/gagal maka tampilankarakter tidak akan muncul.
RS232 of serial communication is the communication system in the computer and microcontroller. This communication was studied in Department of Electrical Engineering and Department of Computer Engineering and Informatics Department at Politeknik Negeri Medan. Recently, an application of simulation was installed on the computer which used for teaching and learning process. The drawback of this system is not useful for communication method between learner and trainer. Therefore, this study was created method of 10 stage to which divided into 7 stages and 3 major phases. It can be namely the analysis of potential problems and data collection, trainer design, and empirical testing and revision.
After that, the trainer and module were tested in order to get feedback from the learner. The result showed that 70.10% of feedback which wide reasonable from the learner of questionnaire. Export citation and abstract.
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