IoT Web Server Based LM35 Temperature Gauge

Updated: Jul 2, 2021

In this tutorial we will show how to build ESP8266 and interface LM35 Precision Centigrade Temperature sensor with html canvas gauge display. This project uses ESP8266 NodeMCU device that easily connects to existing WiFi network & creates a Web Server. When any connected device accesses this web server, ESP8266 reads in temperature from LM35 Temperature sensors & sends it to the web browser. In this project temperature range reads trimmed from 0°C to 100°C (Actual -55°C to 150°C).

Components Required

NodeMCU ESP8266 12E Dev Board

LM35 sensor Module

Circuit Diagram