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Using an RFID module with an ESP8266

Using an RFID module with an ESP8266

by | 3 May 2021 | Tutorials

The RC522 RFID module is a smart card reader which, among other things, allows to activate a mechanism when the right card is presented to the reader. In this tutorial, we will see the management of an RC522 RFID module with a NodeMCU ESP8266 card. Prerequisite:...
Communication between two ESP8266 via WiFi

Communication between two ESP8266 via WiFi

by | 3 May 2021 | Tutorials

The NodeMCU ESP8266 is a small microcontroller with a Wifi chip. It is possible to establish a communication between two ESP8266, when they are connected on the same network. In this tutorial, we will see a Master/Slave architecture, in which an ESP8266 will play the...
Using an RFID module with an ESP32

Using an RFID module with an ESP32

by | 3 May 2021 | Tutorials

The RC522 RFID module is a smart card reader which, among other things, allows to activate a mechanism when the right card is presented to the reader. In this tutorial, we will see the management of an RC522 RFID module with an ESP32 NodeMCU card. Prerequisite:...
Programming an ESP32 NodeMCU with the Arduino IDE

Programming an ESP32 NodeMCU with the Arduino IDE

by | 23 Apr 2021 | Tutorials

ESP32 NodeMCUs are more and more used to make connected objects thanks to their embedded Wifi and Bluetooth links and their computing power. We will see how to use the Arduino IDE to program a NodeMCU. The way to configure the Arduino IDE is similar between these...
Using an AC Light Dimmer with Arduino

Using an AC Light Dimmer with Arduino

by | 19 Apr 2021 | Tutorials

The AC light dimmer is a module that allows to vary the power of an alternating current. It has the same use as a transistor in direct current. It can be used to vary the brightness of a lamp supplied with 220V or to vary the speed of a fan, for example. Material...
Using a ServoHat with Raspberry Pi

Using a ServoHat with Raspberry Pi

by | 15 Apr 2021 | Tutorials

The ServoHat is a shield for Raspberry Pi that is based on the PCA9685 controller. The PCA9685 module is a 16 channel controller that allows you to drive 16 PWM outputs via I2C communication. It allows among other things to free inputs and outputs of your...
Line detection with Python and OpenCV

Line detection with Python and OpenCV

by | 11 Mar 2021 | Tutorials

An interesting application in robotics is pattern recognition. In this tutorial we are going to use the OpenCV library in a Python code that will allow us to detect a cable at its centre. In order to achieve this line tracking we will perform image processing with...
Installing OpenCV on Raspberry Pi

Installing OpenCV on Raspberry Pi

by | 11 Mar 2021 | Tutorials

To perform the image processing we will install OpenCV on the Raspberry PI. OpenCV is a free graphics library that makes image processing relatively easy. With OpenCV, it is possible to process images from the Pi Camera V2. Material Raspberry PI avec une distribution...
Managing a PiCam V2 with Raspberry Pi

Managing a PiCam V2 with Raspberry Pi

by | 11 Mar 2021 | Tutorials

One of the most interesting elements to add is the Raspberry Pi Camera V2 or PiCam. This component allows you to take photos and videos. It is also possible to perform live image processing, such as line tracking for a robot. Material Raspberry Pi with a Linux...