Aqara Presence Sensor, Smoke Alarm and Sensor Installation in London

• Presence Sensor FP2: runs over Wi-Fi without a hub, needs USB-C power all the time, and goes wall-mounted for zones and multi-person tracking or ceiling-mounted for fall detection
• Presence Multi-Sensor FP300: radar plus two infrared sensors, light, temperature and humidity, on two CR2450 coin cells that Aqara puts at up to 3 years on Zigbee or 2 on Thread; wall, ceiling, corner or magnetic mount, angled at 45° in a corner
• Spatial Multi-Sensor FP400: USB-C at 5 V 1 A, with only a cable in the box; side, corner or ceiling mounting, at 3–4 m on a ceiling; up to 10 people in 8 zones, with full features on an Aqara hub such as the M3, M100 or M200
• Presence Sensor FP1E: Zigbee 3.0, powered over USB, for an Aqara hub

• A USB adapter in an existing socket, with the cable clipped neatly or run in trunking: no electrical installation work
• An existing socket swapped for one with USB outlets: a replacement, not notifiable
• A new socket or USB point spurred from an existing circuit, closer to the sensor: not notifiable outside a bathroom zone, and you should ask your pro for a Minor Electrical Installation Works Certificate
• Screws and new cable runs in a rented home need your landlord's agreement first

• Let lodgers, cleaners, carers and anyone else living or working there know the sensors exist
• In a shared house, keep sensors out of communal rooms and out of bathrooms other people use
• Landlords, holiday-let hosts and families monitoring a relative may fall outside the household exemption
• Aqara's UK shop advertises sleep monitoring on the FP2, with heart and breathing rates; that is health information, so the pro enables it just for the person who requested it

• Thread sensors, such as the Door and Window Sensor P2 (DW-S02E) and the Motion and Light Sensor P2 (ML-S03E), need a Thread border router, such as the Aqara Hub M3
• Zigbee models, including the Door and Window Sensor T1, the Vibration Sensor T1 and the Motion Sensor P1, need an Aqara hub; Aqara says Zigbee2MQTT and similar third-party USB dongles are not officially supported
• The Multi-State Sensor P100 (VB-S03E), which senses a door opening and vibration, works on Thread or Zigbee
• The Wireless Remote Switch H1 and Wireless Mini Switch T1 stick to the wall, the no-wiring way to add a second switch position

• Aqara's UK shop lists EN 14604:2005/AC:2008 as its standard, with a CR17450 battery lasting up to ten years, and Aqara gives the alarm as up to 85 dB
• App alerts need an Aqara Zigbee 3.0 hub, and Device Alarm Grouping in the Aqara Home app lets several detectors sound together
• The pro never removes or disconnects existing mains smoke alarms to make room for one
• Landlords in England must have a smoke alarm on each storey with living accommodation and a carbon monoxide alarm in any room used as living accommodation that has a fixed combustion appliance other than a gas cooker; the regulations do not fix the type, and gov.uk favours sealed-for-life batteries where battery alarms are chosen
• Approved Document B, for new homes and some building work, asks for mains-operated smoke alarms and considers a Grade D2 Category LD3 system under BS 5839-6 adequate

A vetted pro prices your Aqara job from the models and your photos, and the JACK app shows that fixed price before you book.

What the job touches moves the price more than the device does. Pairing a hub, fixing sensors, clipping a Curtain Driver E1 onto a rail or fitting radiator thermostat heads is set-up work. A smart lock is locksmith work on the door. An H1 or H2 switch, a Dual Relay Module T2 or a 230 V blind motor is mains work on an existing circuit, priced for isolating, connecting and testing.

The home comes next: a multipoint door that needs adjusting before a lock goes on, a bell transformer too weak for the doorbell, a PoE cable through solid brick. Where a job needs a second pair of hands, your pro can ask another pro on JACK to help through the Pro2Pro feature. Several devices, Aqara or other brands, go on one booking for one fixed price.

You buy the Aqara products; JACK does not sell them. Accessories the job needs, such as a replacement cylinder, a deeper back box, a 12 V plug-in supply or a PoE injector, are agreed and added at cost before you book, and so is parking where it has to be paid for. Prefer to pay for time? As a guide, hourly hire is typically £45–£95 per hour for smart home work, £55–£110 for electrical work and £60–£130 for locksmith work, and a full-day handyman booking is a flat £350–£400 for up to 8 hours on site.