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- Serial communication protocol rs232 data mismatch serial#
- Serial communication protocol rs232 data mismatch Patch#
RS-232 is a standard communication protocol for linking computer and its peripheral devices to allow serial data exchange. What is RS232 – “RECOMMENDED STANDARD 232” The Electronic Industries Association published three modifications, the most recent being EIA232F introduced in 1997. The name of standard was also changed from RS232 to EIA232. The standard has been revised many times after the initial one and updated by Electronic industries association. So, to put an end to all theses disparities in equipments, syndicate of manufacturers built a transmitter that supplied +5V and -5v and labeled them as “RS-232” compatible and they are same till date.
Serial communication protocol rs232 data mismatch Patch#
The lack of adherence to the standard produced a thriving industry of breakout boxes, patch boxes, test equipments, books and other aids for the connection of dissimilar equipments. This led to the common problems like non-standard pin assignment of circuits on connectors, and incorrect or missing control signals. Because of this the market was flooded with different manufactures with their own standards for their devices. Like a computer of HP will only be able to use HP peripheral devices. O overcome this problem, designers started implementing an RS232 interface compatible to their equipments. But the standard was unable to fulfill the requirements as it was developed specifically for modem and teletypewriter. So, they thought of adopting this standard in electronic devices for digital data exchange. RS232 was the only available standard at the time which was used for data exchange. But there was no standard or method to accomplish this task. For example data exchange between a computer and a printer or two computers. There came a time where manufacturers felt the need to exchange information between these electronic devices.
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The standard defined voltage levels that made it immune to noise disturbances and reduced the error in data exchange.Īs the technology was growing many electronic devices were being developed during this time like computers, printers, test instrument etc. It made the data exchange more reliable over analog channel. It was a standard for electromechanical typewriters and modems for digital data exchange introduced in 1962 by the Radio Sector of EIA. RS232 was the first milestone reached in this journey.
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From simple analog communication over the telephone wires to the typical USB cables for data exchange, we have come a long way in the field of communication.