diff --git a/viwib-1-firmware-upgrade.sh b/viwib-1-firmware-upgrade.sh
new file mode 100755
index 0000000..1aca868
--- /dev/null
+++ b/viwib-1-firmware-upgrade.sh
@@ -0,0 +1,85 @@
+#!/bin/sh
+# 2020-06-13, Nico Schottelius
+# See https://ungleich.ch/u/products/viirb-ipv6-box/
+
+if [ $# -lt 1 ]; then
+    echo "$0 interface [address]"
+    echo "    interface to add the config ip address to"
+    echo "    address: connect to this address, ignore the interface"
+    exit 1
+fi
+
+set -x
+dev=$1; shift
+
+# $# = 2
+# shift -> remove the first argument
+# $# = 1
+
+if [ $# -ge 1 ]; then
+    viwib_ip=$1; shift
+    dev=""
+else
+    viwib_ip=192.168.8.1
+fi
+
+# openwrt
+version=19.07.4
+filename=openwrt-${version}-ramips-mt76x8-gl-mt300n-v2-squashfs-sysupgrade.bin
+
+# IP address for setting it up initially
+
+if [ "$dev" ]; then
+    sudo ip addr del 192.168.8.2/24 dev "$dev" 2>/dev/null || true
+    sudo ip addr add 192.168.8.2/24 dev "$dev"
+fi
+
+# don't care about other/old known_host entries
+ssh-keygen  -R ${viwib_ip}
+
+while ! ping -c1 ${viwib_ip}; do
+    echo "Cannot ping $viwib_ip yet - waiting"
+    sleep 1
+done
+
+cat ~/.ssh/id_rsa.pub | ssh root@${viwib_ip} "cat > /etc/dropbear/authorized_keys"
+
+# Don't re-download if we already have it
+wget -c http://downloads.openwrt.org/releases/${version}/targets/ramips/mt76x8/${filename}
+
+if echo $viwib_ip | grep -q :; then
+    scp_ip="[$viwib_ip]"
+else
+    scp_ip="$viwib_ip"
+fi
+
+scp ${filename} root@${scp_ip}:/tmp
+ssh root@${viwib_ip} "sysupgrade -n /tmp/*.bin"
+
+# It still pings for some time - wait for the reboot to happen
+echo "Waiting for viwib to really disappear"
+sleep 15
+
+wait=0
+found=""
+
+while [ $wait -lt 180 ]; do
+    ping -c1 ${viwib_ip} >/dev/null
+
+    if [ $? -eq 0 ]; then
+        found=yes
+        # wait for ssh to come up
+        sleep 10
+        break
+    fi
+
+    sleep 1
+    wait=$((wait+1))
+    done
+
+if [ ! "$found" ]; then
+    echo "Did not find updated viwib - debug / restart it"
+    exit 1
+fi
+
+echo "viwib successfully updated to ${version}"