Update AIMobile yocto OS on the flight. It checks the active slot, picks the other partition, writes, flips the slot, and reboots — nothing else.

update-aimobile-ext4.sh

#!/bin/bash
set -euo pipefail

ROOTFS="${1:?Usage: $0 <rootfs.ext4>}"

[ -f "$ROOTFS" ] || { echo "Error: file not found: $ROOTFS"; exit 1; }

ACTIVE=$(/usr/sbin/nvbootctrl get-current-slot)

if [ "$ACTIVE" = "0" ]; then
    INACTIVE_PART=/dev/nvme0n1p2
    NEXT_SLOT=1
else
    INACTIVE_PART=/dev/nvme0n1p1
    NEXT_SLOT=0
fi

echo "Active slot: $ACTIVE"
echo "Writing to:  $INACTIVE_PART"

dd if="$ROOTFS" of="$INACTIVE_PART" bs=4M conv=fsync status=progress

/usr/sbin/nvbootctrl set-active-boot-slot "$NEXT_SLOT"
echo "Boot slot set to: $NEXT_SLOT — rebooting"
sync && /sbin/reboot