Monthly Archives: November 2018

Build an App with App Inventor which can display values of a connected sensor

This tutorial describes how to Use App Inventor to build an App which can read the online values of a connected sensor. For this, it uses a WebViewer Component and a Clock to refresh values. This is part 2 of a series, the first part, “Create a connected sensor” can be found here. This second … Continue reading Build an App with App Inventor which can display values of a connected sensor

DHT ESP32 Closeup

Tutorial: Create a connected sensor

This tutorial demonstrates how to build a simple sensor and publish its values online (on a web server) using an ESP32 module. We will build an Arduino sketch which will read the sensor values, connect to WiFi, connect to a website and publish the values on the website. The published values can then be used … Continue reading Tutorial: Create a connected sensor

Show location of photo in Google maps

Today I created a coding example which demonstrates how to read Exif data from an uploaded photo and extract the GPS location from that and show the location of where the photo was taken using Google Maps. To accomplish this, I combined two pens from CodePen into this example: “Google Maps Latitude & Longitude by … Continue reading Show location of photo in Google maps