nerves_system_openwrt_one

# boardid.config for the OpenWRT One
#
# boardid prints a unique board serial number that the rest of the Nerves
# stack uses for hostname generation, default node names, and provisioning
# bookkeeping. Lines are tried in order; the first one that returns a
# value wins.
#
# Override this file by dropping a replacement at the same path in your
# Nerves application's rootfs_overlay directory.

# 1. Operator-set serial number stored in the U-Boot environment.
#    Set via `fw_setenv nerves_serial_number ...` from the device, or
#    via fwup provisioning at flash time. This is the preferred source
#    because it lets manufacturing assign meaningful IDs.
-b uboot_env -u nerves_serial_number

# 2. Backwards-compat alias.
-b uboot_env -u serial_number

# 3. Hardware fallback: read the 6-byte factory MAC base out of the SPI
#    NOR `factory` MTD partition. Layout (from the device tree):
#      offset 0x0  - 0x1000 bytes : WiFi calibration EEPROM
#      offset 0x4  - 6 bytes      : MAC base (used for eth + wlan derived)
#      offset 0x24 - 6 bytes      : WAN-specific MAC
#    Reading offset 0x4 gives us a per-device unique 12-char hex string
#    (e.g. "2005b7013030"). erlinit's `-n nerves-%-.4s` slices off the
#    last 4 chars for the hostname, e.g. "nerves-3030".
#
#    /dev/mtdblock1 is the SPI NOR `factory` partition on this board.
#    If MTD numbering ever changes, update the path here.
-b binfile -f /dev/mtdblock1 -l 6 -k 0x4 -t hex