enable being able to refresh screen evey x mins

kiosk_skeleton/boot/kioskbrowser.ini

@@ -17,6 +17,8 @@ reboot_time = 04:00
 ; configure screen to power on/off as specific time of day (time format in 24 hours)
 ;screen_off_time=23:00
 ;screen_on_time=07:00
+; configure chrome to refresh the page every x minutes
+;refresh_screen_every_x_min=15
 
 [wifi]
 ; If you need more complex WiFi settings (like WPA2-Enterprise, hidden SSIDs, etc.)

kiosk_skeleton/build.sh

@@ -80,6 +80,7 @@ systemctl enable nginx
 systemctl enable ssh
 systemctl enable kiosk-sechedule-screen.service
 systemctl enable schedule-reboot.service
+systemctl enable screen-refresh.service
 
 
 # generate a version info/build info file

kiosk_skeleton/etc/systemd/system/screen-refresh.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Refresh Screen
+After=graphical.target
+
+[Service]
+Type=oneshot
+User=pi
+Environment=DISPLAY=:0
+Environment=XAUTHORITY=/home/pi/.Xauthority
+ExecStart=/usr/bin/refresh-screen

kiosk_skeleton/usr/bin/refresh-screen

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+export DISPLAY=:0
+/usr/bin/xdotool key F5

kiosk_skeleton/usr/bin/setup-refresh-timer

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+INI_FILE="/boot/kioskbrowser.ini"
+REFRESH_INTERVAL=$(awk -F '=' '/^\[screen\]/ { in_screen=1; next }
+                                in_screen && /^\[/ { in_screen=0 }
+                                in_screen && $1 ~ /refresh_screen_every_x_min/ { gsub(/ /, "", $2); print $2 }' "$INI_FILE")
+
+# Safely check if REFRESH_INTERVAL is a positive integer
+if [[ "$REFRESH_INTERVAL" =~ ^[0-9]+$ ]] && (( REFRESH_INTERVAL > 0 )); then
+    echo "Setting up screen refresh every $REFRESH_INTERVAL minutes..."
+
+    SERVICE_UNIT="/etc/systemd/system/screen-refresh.service"
+    TIMER_UNIT="/etc/systemd/system/screen-refresh.timer"
+
+    cat <<EOF | sudo tee "$SERVICE_UNIT" > /dev/null
+[Unit]
+Description=Refresh Screen
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/refresh-screen
+EOF
+
+    cat <<EOF | sudo tee "$TIMER_UNIT" > /dev/null
+[Unit]
+Description=Run screen refresh every $REFRESH_INTERVAL minutes
+
+[Timer]
+OnBootSec=1min
+OnUnitActiveSec=${REFRESH_INTERVAL}min
+Persistent=false
+
+[Install]
+WantedBy=timers.target
+EOF
+
+    sudo systemctl daemon-reload
+    sudo systemctl enable --now screen-refresh.timer
+else
+    echo "Invalid or missing refresh interval"
+fi