Published October 18, 2025 © MIT

Smart Home Automation with Google Assistant & Alexa

Control your home appliances with your voice using Google Assistant & Alexa — a complete smart home project by YaranaIoT Guru

BeginnerFull instructions provided8 hours52

Smart Home Automation with Google Assistant & Alexa

Things used in this project

Software apps and online services

Arduino IDE

Story

Mr. Abhishek Maurya, founder of Yarana IoT Guru, wanted to build a smart home sensor system that could fit into a compact space.

He discovered the Arduino Nano ESP32 — a tiny yet powerful board packed with Wi-Fi and Bluetooth features.

Within just a few hours, he developed a mobile-controlled lighting system and a temperature monitoring setup, fully powered by Yarana Smart Home Technology.

💬 “It amazed me — a tiny board doing everything a full ESP32 Dev Board can do!”

🚀 Powered by Yarana IoT Guru

📞 Contact: +91 7052722734

🌐 Website: https://yaranaiotguru.in

📺 YouTube: @YaranaIotGuru

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "YourBlynkAuthToken";
char ssid[] = "YourWiFiSSID";
char pass[] = "YourWiFiPassword";

BLYNK_WRITE(V1) { digitalWrite(23, param.asInt()); }
BLYNK_WRITE(V2) { digitalWrite(22, param.asInt()); }
BLYNK_WRITE(V3) { digitalWrite(21, param.asInt()); }
BLYNK_WRITE(V4) { digitalWrite(19, param.asInt()); }

void setup() {
  pinMode(23, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(19, OUTPUT);
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run();
}