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AT commands and cygwin

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# 1  
Old 08-13-2009
Error AT commands and cygwin
Hello!!!
I try to run this code in cygwin:

echo "AT">/dev/ttyS2
echo "AT+COPS=?">/dev/ttyS2
read $LINE</dev/ttyS2
echo $LINE

I want to communicate with serial port /dev/ttyS2 but I found some problems. I have tried to use the AT commands in Hyperterminal and it has worked...why doesn't work through shell bash???
Sorry for my bad english!!! Smilie
Byeeee
# 2  
Old 08-13-2009
Two things:
  • You probably have to set the baud rate and such first. It's not going to magically guess. See 'man stty'.
  • Open and close the file only when you want to open and close the modem. Smilie It may be sending hangup signals every time you close the file.
# 3  
Old 08-13-2009
What does 'ls -l /dev/' show? Because in my Cygwin installation, there is no /dev/ttyS*. Or any other device file for that matter. This is probably because /dev on a Linux system contains a virtual filesystem that acts as an arbiter to the kernel modules, and this functionality can't be emulated by Cygwin.
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