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Enable inclusion of both ESP32 Blynk BT / BLE and WiFi libraries. Then run both WiFi and BT/BLE simultaneously, or select one to use at runtime after reboot. Eliminate hardcoding your Wifi and Blynk credentials and configuration data saved in either SPIFFS or EEPROM.
Controlling the lights in your house using your voice is a great way to dip your toes into the smart homeworld. And if you already have a smartphone you can build your own smart switch using a few bucks.
This is a project which uses esp8266 and arduino UNO along with ultrasonic sensor to detect the distance and send it to blynk mobile app and thingspeak channel.
This program allows users to connect to the wifi using NodeMCU (ESP8266) module to control any electronic output devices (240V bulb in this case) using the BLYNK Application on any smartphone or tablet from anywhere in the world.