ZigBee Arrival Sensor For Car

iharyadi · January 22, 2022, 4:31pm

NOTE: If you running Zigbee2MQTT version 1.25.2 or newer, you do not need to manually copy the external converter. Zigbee2MQTT has included the converter as part of their release. You can directly start the pairing/joining process. Please watch for my notes below. They are still valid.

I just want to add some information on how to use the sensor. I uses Zigbee2MQTT. All I need to do is to copy “external converter”. In zigbee2mqtt, for devices that has not been commercialized, the driver does not get included in the release. Zigbee2mqtt allow us to make our own driver called external converter.

Here is the external converter for the sensor.

github.com

iharyadi/ExternalDriverforZ2M/blob/master/arrival.js

const fz = require('zigbee-herdsman-converters/converters/fromZigbee');
const tz = require('zigbee-herdsman-converters/converters/toZigbee');
const exposes = require('zigbee-herdsman-converters/lib/exposes');
const e = exposes.presets;
const reporting = require('zigbee-herdsman-converters/lib/reporting');

const {
    precisionRound, mapNumberRange, isLegacyEnabled, toLocalISOString, 
    numberWithinRange, hasAlreadyProcessedMessage,
    calibrateAndPrecisionRoundOptions, addActionGroup, postfixWithEndpointName, 
    getKey,batteryVoltageToPercentage, getMetaValue,
} = require('zigbee-herdsman-converters/lib/utils');
const tuya = require('zigbee-herdsman-converters/lib/tuya');
const globalStore = require('zigbee-herdsman-converters/lib/store');
const constants = require('zigbee-herdsman-converters/lib/constants');
const libColor = require('zigbee-herdsman-converters/lib/color');
const utils = require('zigbee-herdsman-converters/lib/utils');

const myoptions = {
	options:{

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You will need to copy the driver to the zigbee2mqtt config folder. Then, you will add the converter in the configuration like below.

Then, restart the zigbee2mqtt instance and start pairing in zigbee2mqtt. When the sensor is discovered, you will see something like below in the zigbee2mqtt dashboard.

At this point, all the entity above will be available to your Home Assistant to automate.

Here are my personal notes.

Once everything is assembled, I personally power the sensor without battery connected. I use a stable DC power and pair the sensor with the hub. I do not have issue paring the sensor with battery. However, I know internally that I coded some slow down during battery powered to save energy. Therefore, I like to pair my sensor while it is in DC mode. Once paired, you can power down the sensor and install the battery. I recommend you charge the battery fully before you install it in the car for convenience.
I am told that you should have the antenna installed when the module is powered. If you do not have the antenna installed, it may damaged the radio. On my personal sensor, I did forget install the antenna a few time while on power. I immediately taken care of the issue. I did not observe any issue. I would re-qualify the recommendation that we probably should not leave the sensor on power without antenna for a long time. If you have to do this for short period of time (a few second), I would not worry about it. I find the module is quite hardy.
if you get your motion radar sensor here is the pinout where you can wire it.

image597×750 72.3 KB
Once you have the sensor ready to install in your car, I recommend that you find a place in the car where it is not exposed to the sun. Putting the sensor behind the windshield is probably not a good idea. I want everyone of us to be careful when handling battery.