How to Build an ESP32 Smart Weather Station from Scratch

### Introduction Environmental telemetry is one of the most rewarding IoT projects for students and makers. In this article, we cover hardware wiring, power optimization techniques, and setting up an MQTT client on the ESP32. ### Circuit Design & Components - ESP32 Development Board - BME280 Temperature/Humidity/Pressure sensor - SSD1306 OLED display ```cpp #include <WiFi.h> #include <PubSubClient.h> // Wi-Fi Configuration const char* ssid = "Your_SSID"; ``` ### Conclusion This station provides precise readings with less than 20mA power consumption during sleep intervals.