You can do this from your settings.
This Trigger fires every time your Android device connects to a Bluetooth device. Learn more
This Action will update the wallpaper on your Android device from the image URL you specify. Learn more
Do more with your Android — automate wallpapers, messages, organize and back up your photos, and increase your battery life. IFTTT is free and makes it easy.
Here at IFTTT, we believe every thing works better together. Smart home automation improvements to existing services and new additions to the integrations available to users.
IFTTT helps people save time by automating and customizing their Smart Home.
Explore more great ways to automate Android Device and Android Device