n00b question. Which is better? HEX-COM or HEX-USB? Site makes it seem that HEX-COM is. Differences?
04-22-2004, 05:19 PM
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n00b question. Which is better? HEX-COM or HEX-USB? Site makes it seem that HEX-COM is. Differences?
I would think that HEX-USB would be better because serial ports are phasing out...
HEX-USB doesn't need software activation codes like HEX-COM correct?
HEX-USB doesn't need software activation codes like HEX-COM correct?
04-22-2004, 07:24 PM
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Serial-vs-USB:
USB is good at sending large packets of data very quickly. Serial is good at sending small packets of data with very precise protocol timing. The communication in the vehicle is much closer to Serial than it is to USB. If you have both a Serial and USB port on your laptop, we recommend you get a Serial Interface. The protocol timing of Serial is ever-so-slightly better than USB. Serial Interfaces can be extended up to 50-ft with standard straight-through Serial cable, whereas the USB standard does not support extensions. Our USB Interfaces require you to install a driver whereas our Serial Interfaces do not. Finally, our Serial Interfaces are a little less expensive than our USB Interfaces.
If your PC has ONLY a Serial port or ONLY a USB port, then your choice has been made for you. Remember that Serial<->USB USB<->RS-232 converters are often unable to handle the baud rate and timing requirements that are demanded by many control modules using the VAG protocol. We have had very poor results with most available USB<->RS-232 converters, therefore USB<->RS232 converters are "Not Supported." Please do not ask us for technical assistance if you are using one of these converters.<ul><li><a href="http://www.ross-tech.com/vag-com/interfaces.html#Chart">http://www.ross-tech.com/vag-com/interfaces.html#Chart</a</li></ul>
If your PC has ONLY a Serial port or ONLY a USB port, then your choice has been made for you. Remember that Serial<->USB USB<->RS-232 converters are often unable to handle the baud rate and timing requirements that are demanded by many control modules using the VAG protocol. We have had very poor results with most available USB<->RS-232 converters, therefore USB<->RS232 converters are "Not Supported." Please do not ask us for technical assistance if you are using one of these converters.<ul><li><a href="http://www.ross-tech.com/vag-com/interfaces.html#Chart">http://www.ross-tech.com/vag-com/interfaces.html#Chart</a</li></ul>
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06-29-2005 06:20 AM