3rd Party Motion Sensor for IFTTT Integration?

[Rcull]

Hello all! 

I have three pro3 floodlight cameras setup on masts on our property. I want to extend the range of the motion detection field by adding some third-party outdoor wireless motion sensors throughout the area, and then integrate them with Arlo in IFTTT. 

The sensors would need to:

• Be able to standalone connect to wifi directly (no zwave/ZigBee/any other types of central hub necessary). 
• Outdoor rated. 
• Battery operable. 
• IFTTT compatible. 
• Ideally pretty cheap, so I can buy a bunch and stick em all over the place. 

Does anyone have any recommendations for third party motion sensors which may suite these needs? Anyone have any general experience with using IFTTT to add additional motion sensors?

Thanks!