tinylock

A Matter door lock on an nRF52833 (DWM3001CDK): commissioned over BLE, run over Thread, unlocked by a phone over UWB.

Module	Role	Flash	RAM
tinytalk	Matter node	52.6 KB	20.9 KB
tinygrid	Thread child	19.3 KB	9.9 KB
tinypsa	PSA Crypto	17.8 KB	1.5 KB
tinycred	Aliro reader	12.7 KB	6.6 KB
tinyuwb	UWB ranging	8.5 KB	0.9 KB
tinyble	BLE host	6.7 KB	2.5 KB
tinyfota	Delta DFU	4.7 KB	1.0 KB
Whole image		197.9 KB	73.3 KB

LTO release build.

Get started

Flash the latest release, then add the lock in Apple Home with setup code 3650-503-5696. Home flags it as uncertified: it carries Matter's test attestation.

nrfutil install device
nrfutil device program --firmware tinylock-*-factory.hex --options chip_erase_mode=ERASE_ALL

Button 0 reopens pairing for 15 minutes; held for 5 s, it resets the lock. LED0 is lit while unlocked.

Build

From an NCS v3.3.0 workspace:

eval "$(<tinylock>/bootstrap)"
west build -b decawave_dwm3001cdk <tinylock>/door-lock -- \
  -DZEPHYR_EXTRA_MODULES="$TINYLOCK_MODULES"

That builds the stock stacks. Each module has a fragment in door-lock/stacks/; the release image uses them all:

The whole image

west build -b decawave_dwm3001cdk <tinylock>/door-lock -- \
  -DZEPHYR_EXTRA_MODULES="$TINYLOCK_MODULES" \
  -DCONF_FILE="prj.conf;stacks/tinyble.conf;stacks/tinygrid.conf;stacks/tinygrid-radio.conf;stacks/tinypsa.conf;stacks/tinyfota-tinyble.conf;stacks/tinyuwb.conf;stacks/tinycred.conf;overlay-release.conf" \
  -DEXTRA_DTC_OVERLAY_FILE="stacks/tinyuwb.overlay;stacks/tinyble.overlay" \
  -DSB_CONF_FILE=stacks/tinyfota/sysbuild.conf \
  -DPM_STATIC_YML_FILE=stacks/tinyfota/pm_static.yml \
  -Dmcuboot_CONF_FILE=<tinylock>/door-lock/stacks/tinyfota/mcuboot.conf

A release pins every library in modules.lock: ./bootstrap --locked checks those commits out, and scripts/release.sh builds one.

Apache-2.0

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