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xaviermiller
Bodhisattva
Joined: 23 Jul 2004
Posts: 8723
Location: ~Brussels - Belgique
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 Posted: Thu Jul 24, 2014 7:59 pm Post subject: SUCCESS using a hplip networked scanner on Raspberry Pi |
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Hello,
the scanner USE flag is hard-masked for the arm, but I tested to scan from a network HP All-in-one printer and it worked flawlessly on a Raspberry Pi, in command-line mode (no X, just "scanimage").
Next step: implement a "scan to folder" daemon, as described in some German forums or blogs.
_________________
Kind regards,
Xavier Miller |
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xaviermiller
Bodhisattva
Joined: 23 Jul 2004
Posts: 8723
Location: ~Brussels - Belgique
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| Posted: Thu Aug 21, 2014 8:52 pm Post subject: |
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Next step: I've created a "scan to network" daemon thanks to this excellent article: http://rende.se/index.php?n=Main.ScanToFolder
My scripts assume there is only one network server, so there is no need to prefix items by host name.
| /etc/hp-netscan.conf: | PRINTER="hplj2820"
SCAN_DIR="/data/nas/scan"
HELPER_DIR="/opt/hp-netscan/helpers" |
| /opt/hp-netscan/bin/scanloop: | #!/bin/bash
cd "`dirname $0`"
source /etc/hp-netscan.conf
set -o pipefail
while true; do
# if scan-to button pressed - run the command corresponding to the destination name
name=`wget -q -O - http://${PRINTER}/hp/device/notifications.xml \
| egrep -o '<ScanToDeviceDisplay>(.*)</ScanToDeviceDisplay>' \
| sed -e 's/<ScanToDeviceDisplay>//' \
| sed -e 's/<\/ScanToDeviceDisplay>//' \
| sed -e 's/.*://'` && {
if [ "$name" != "" ]; then
if [ -x "${HELPER_DIR}/$name" ]; then
(cd ${SCAN_DIR}; OUTPUT_PREFIX="scan_$(date +%Y%m%d%H%M%S)" "${HELPER_DIR}/$name" >/dev/null 2>&1)
chmod a+rw ${SCAN_DIR}/*
fi
fi
}
# update scan-to destinations in printer if necessary
./scanto_destination -l | sed 's/.*://' >/tmp/printer-dests &&
ls ${HELPER_DIR} >/tmp/command-dests &&
diff /tmp/printer-dests /tmp/command-dests | egrep '<|>' |
sed 's#<#./scanto_destination -d#;s#>#./scanto_destination -a#' | bash
sleep 5
done |
| /opt/hp-netscan/bin/scanto_destination: | #!/bin/bash
# command to maintain the scan-to destination list in the HP Color LaserJet 2840 printer
source /etc/hp-netscan.conf
if [ "$1" == "-a" ]; then
name=$2
postdata="AddScanToDest_1=$HOSTNAME^${name/:/%3a}^DestFolder"
wget -q -O - --post-data="$postdata" http://${PRINTER}/hp/device/set_config.html
elif [ "$1" == "-d" ]; then
name=$2
postdata="RemoveScanToDest_1=${name/:/%3a}"
wget -q -O - --post-data="$postdata" http://${PRINTER}/hp/device/set_config.html
elif [ "$1" == "-l" ]; then
wget -q -O - http://${PRINTER}/hp/device/info_scanto_destinations.xml \
| sed -n '/<DeviceDisplay>/s/<\/*DeviceDisplay>//gp'
else
echo 'usage: scanto_destination -l -a <destname> -d <destname> for listing adding and deleting destinations'
fi |
and a sample helper
| /opt/hp-netscan/helpers/color_300_tiff: | RESOLUTION=300
scanimage --format=tiff --resolution $RESOLUTION > ${OUTPUT_PREFIX}_${RESOLUTION}.tiff |
and the openrc script
| /etc/init.d/hp-netscan: | #!/sbin/runscript
start() {
ebegin "Starting hp_netscan"
start-stop-daemon --start --exec /opt/hp-netscan/bin/scanloop \
--pidfile /var/run/hp-netscan.pid -b -m
eend $?
}
stop() {
ebegin "Stopping hp_netscan"
start-stop-daemon --stop --exec /opt/hp-netscan/bin/scanloop \
--pidfile /var/run/hp-netscan.pid -b -m
eend $?
} |
_________________
Kind regards,
Xavier Miller |
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