With serial drivers one always worries about overruns and framing errors. These are usually the reason for lost data. Probably also the reason sysread is choking. I would expect to see some error handling in your read loop but I don't see any. Something like:

 if ($LatchErrorFlags & CE_FRAME) { warn "Framing Error"; }

Does your device implement rts/cts flow control? Does the serial cable contain the rts/cts lines. Do any adapters omit those lines?

s//----->\t/;$~="JAPH";s//\r<$~~/;{s|~$~-|-~$~|||s |-$~~|$~~-|||s,<$~~,<~$~,,s,~$~>,$~~>,, $|=1,select$,,$,,$,,1e-1;print;redo}

In reply to Re: Win32:SerialPort not reading all characters by starbolin
in thread Win32:SerialPort not reading all characters by sxmwb

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