In the MyDyson app, tap on your V15 device. The app will "wake up" the vacuum. You may need to pull the trigger on the vacuum once to activate the Bluetooth radio.
Standard Dyson cordless vacuums like the Dyson V15 Detect do not support user-accessible firmware updates. Unlike Dyson’s connected products (such as their robot vacuums or air purifiers), the lacks a Wi-Fi or Bluetooth connection to receive Over-the-Air (OTA) updates through the MyDyson app Key Facts About V15 "Software" Hardware Locked: dyson v15 firmware update
: Automatically increases suction power when it detects high concentrations of dust [Dyson V15 Detect Official Page]. LCD Screen Dyson V15 Detect Firmware Update: What’s New, How
from long-time users who feel forced to buy an entirely new machine just for a software-enabled attachment. www.reddit.com Managing Your V15 Without Updates Open the app on your iPhone or Android device