# Perimeter Detection **URL:** \ **Category:** ZYMKEY4\ **Created:** [February 18, 2020, 7:20pm UTC](https://community.zymbit.com/t/perimeter-detection/730 "2020-02-18T19:20:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![priyanka](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@priyanka](https://community.zymbit.com/u/priyanka)\ **Post date:** [February 18, 2020, 7:20pm UTC](https://community.zymbit.com/t/perimeter-detection/730/1 "2020-02-18T19:20:09Z")
Which API should I use to implement perimeter detection using Zymkey 4i? ---
**Author:** ![Phil\_S\_Zymbit\_1](https://avatars.discourse-cdn.com/v4/letter/p/45deac/32.png) [@Phil\_S\_Zymbit\_1](https://community.zymbit.com/u/Phil_S_Zymbit_1)\ **Post date:** [February 18, 2020, 7:27pm UTC](https://community.zymbit.com/t/perimeter-detection/730/2 "2020-02-18T19:27:42Z")
All zymbit features, including perimeter detection, are accessible through a single API, which is available in Python, C, C++ languages. Check it out here \> > [@API Documentation](https://community.zymbit.com/t/api-documentation/189): > > API DOCUMENTATION Documentation is updated from time to time. Be sure to clear your browser cache so that you get the latest version. The latest API documentation can be found on line at: [https://docs.zymbit.com/](https://docs.zymbit.com/quickstart/api/)play_button Legacy PDF documents ---
**Author:** ![priyanka](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@priyanka](https://community.zymbit.com/u/priyanka)\ **Post date:** [February 19, 2020, 5:38pm UTC](https://community.zymbit.com/t/perimeter-detection/730/3 "2020-02-19T17:38:42Z")
Thank you for the help Phil. I have another doubt, I am using Zymkey 4i along with a Raspberry Pi and want to implement perimeter detection, what other hardware devices will I need? I read that I need a USB cable, is there anything apart from that?