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Using WiFi to Monitor Sensor Data

This tutorial will show you how setup a simple peer-to-peer connection to send and receive sensor data between two ESP32 WiFi boards.

We’re all familiar with WiFi. It runs our home, let’s us stream our favorite movies, and keeps us from having to talk with other people when we’re at a coffee shop. But there’s more ways to use WiFi than simply accessing the internet through different applications. In this tutorial, we’ll show you how to set up your own peer-to-peer network to sense data from one area and send that data to an LCD screen somewhere else without needing any internet connection or routers. This a great first step in being able to remove the wires from any embedded physical computing application.

The Project: Wirelessly Monitor Temperature, Humidity, and Barometric Pressure
For this build, we’re going to create a simple point-to-point closed WiFi system that reads the data from an environmental sensor and sends it to a display somewhere else. We’ll keep this example as simple as possible by using our hardware, utilizing the Qwiic Connect System to connect our hardware without the need for soldering. The hardware includes a pair of ESP32 Thing Plus Wroom modules, a Qwiic Environmental Combo Breakout, a SparkFun Qwiic Single Relay, and a couple of Qwiic Cables. (And of course, a power supply - either battery or wall charger - for each.)”

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