AtmoSense: An ESP32-Based IoT Weather Monitoring Station with Local and Remote Visualization

Localized environmental monitoring can supplementregional weather reports by providing measurements at the pointof interest. This paper describes AtmoSense, a prototype Internetof Things (IoT) weather monitoring station built around anESP32 microcontroller. The implemented sensor suite comprisesa DHT11 for ambient temperature and relative humidity, aBMP180 for atmospheric pressure, a light-dependent resistor(LDR) for relative brightness, and a rain-detection module. A16×2 character LCD provides local readings while a Wi-Fi con-nection enables remote visualization through the Blynk platform.The prototype was assembled and functionally checked on abreadboard after difficulties with an earlier printed-circuit-boardimplementation. This paper presents the architecture, interfacingapproach, signal interpretation, functional verification, imple-mentation challenges, and limitations. No meteorological-gradecalibration or long-duration field validation is claimed. The re-sulting platform demonstrates a low-cost instructional approachto distributed environmental sensing and remote telemetry.Index Terms—ESP32, Internet of Things, weather monitoring,DHT11, BMP180, LDR, rain detection, Blynk, environmentalsensing.