The relays can be switched on and off individually via BLE or Wi-Fi connection.
Relays: 4 independently controlled via ESP32 Document link: https://drive.google.com/open?id=0B4XvqQlEcMDQanVtTjBvd3VYbXc
Over Wi-Fi, the relay states can be controlled with a simple GET statement for easy integration with your applications.
The Wi-Fi webserver provides a JSON interface for relay states. A Bluetooth GATT server is created and can be used concurrently with the Wi-Fi access point.
What You Get: 1 X ESP32S 4 Channel Wifi Bluetooth Relay Module. Our 1 Year Worry Free Warranty time and Friendli Customer Service.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.36 inch
Height : 0.79 inch
Length : 2.4 inch

Item Weight: 1 pounds (View shipping rates and policies)
Shipping Weight: 2.24 ounce (View shipping rates and policies)

ASIN : B06Y5DSK21