KC868-A4 smart controller, many hardware resources for you to use, you can write any code by Arduino IDE to ESP32 wifi/bluetooth module. We will supply demo codes for different samples. Everyone can modify and change the code for their own smart home automation system project. order link: https://www.aliexpress.com/item/1005002709444272.html?spm=a2g0o.store_pc_home.productList_1276220108.pic_0 visit for more: KinCony's website: https:www.kincony.com Aliexpress Online Store: https://kincony.aliexpress.com/ Facebook: https://www.facebook.com/kincony.smarthome Twitter: https://twitter.com/kincony WhatsApp number:+86-15381188302