Onderwerp: RPI als boordcomputer

#!/bin/bash

GPS_Device=/dev/ttyUSB0

#!/bin/bash

GPS_Device=/dev/ttyUSB0
GPS_Baudrate=4800

if [ ! -e ${GPS_Device} ]
then
    echo "${GPS_Device} DOES NOT EXIST!!!! "
    exit 1
fi

stty -F ${GPS_Device} ${GPS_Baudrate}

while [ 1 ]
do
    read  this_line < $GPS_Device
 
    # if cr/lf bothers you, make it lf only
    # (os-specfic concern)
    #
    this_line=$( echo $this_line | sed s/$'\r'//g )
 
    echo $ts $this_line >> full-log.txt
 
    # let us filter the current position
    #
    if [[ "$this_line" =~ "RMC" ]]
    then
        # ok, it looks like a GPS reading (may be void)
        # if field 3 is V, the reading is void (or maybe
        # only untrusted?), if it is A, then the position
        # is Active (and therefore given with confidence?)
        #
        if [[ $(echo $this_line | cut -d, -f 8-10) != ",,," ]]
        then
            # get date (field 10 of RMC)
            date1=($(echo $this_line | \
                cut -d, -f '10' ))
            
            if [ ${#date1}=6 ]
            then
                # get time (field 2 of RMC)
                time=($(echo $this_line | \
                    cut -d, -f '2' ))

                if [ ${#time}=6 ]
                then
                    if sudo date -u -s ${date1:4:2}"-"${date1:2:2}"-"${date1:0:2}" "${time:0:2}":"${time:2:2}":"${time:4:2} 
                    then
                        break
                    fi
                fi
            fi
        fi
    fi
done 



pgrep -x opencpn >/dev/null && echo "OpenCPN already running" || opencpn&

exit 0