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Hi. A while back, I wrote a small driver for Orbcomm modems. Turned out that when I calculated the checksum, instead of doing "256-", I was doing "255-". It might be a detail like that. What type of serial stream are you looking at? Is it some sort of OBD2 or GPS ASCII? I used TS7200 with all kinds of RS232s, native
and USB/Serial, and they worked great. One more thing. Are you sure you don't have too much EM interference? This is highly unlikely, though. my $.02 __._,_.___
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