reMarkable Backup Script. All files expect to be in /home/root/backup/

backup.service

[Unit]
Description=Rsync documents to basement server.
Wants=backup.timer

[Service]
Type=oneshot
ExecStart=/home/root/backup/backup.sh

[Install]
WantedBy=multi-user.target

backup.sh

#!/bin/bash

SSID=`iwgetid -r`

if [ "$SSID" = "Aardvark 51" ]; then 
  /opt/bin/rsync --quiet --recursive --times --rsh=ssh --delete --partial "/home/root/.local/share/remarkable/xochitl" "ac@10.0.1.23:Dropbox/Projects/reMarkable/document_backups/"
fi

backup.timer

[Unit]
Descriptions=Backs up files every hour.
Requires=backup.service

[Timer]
Unit=backup.service
# Wait for network to be available.
ExecStartPre=/bin/sleep 30
OnBootSec=5min
OnUnitActiveSec=30min

[Install]
WantedBy=timers.target

install-backup.sh

#!/bin/bash

opkg install rsync
chmod +x /home/root/backup/backup.sh
ln -s /home/root/backup/backup.service /etc/systemd/system/backup.service
ln -s /home/root/backup/backup.timer /etc/systemd/system/backup.timer
systemctl enable backup.timer