Jo�o Coimbra wrote: > > Hi all how can I read a sonnar through a serial port (rs-232 > communication)? There is some example to help me? > Thank you !!! > > -- [rtl] --- > To unsubscribe: > echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR > echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] > -- > For more information on Real-Time Linux see: > http://www.rtlinux.org/ It's probably NMEA. This is an international standard, also known as IEC 1162. The messages are human readable text, you can use minicom to see them. >From a sonar you probably get $SD (depth sounder) and $SS (scanning sounder) messages. e.g. depth message: $SDDPT,x,y,z*CC | | | | | +- Checksum | +- Transducer offset positive - distance to waterline | negative - distance to keel +- Water depth rel. to transducer in metres Check the manufacturer's documentation, they usually support a range of propietary messages. The simplest way to read a serial port is probably this: > stty -F /dev/ttyS0 ispeed 4800 ospeed 4800 # this is COM1, 4800 Bits/s > cat /dev/ttyS0 Iwo -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
