We will check how to apply JSONPath expressions to query JSON objects and obtain the values of the properties.
Continue reading “JavaScript: JSONPath”JavaScript: getting keys of object
In this tutorial we will learn how to obtain the keys of a JavaScript object, using a method from the Object class.
Continue reading “JavaScript: getting keys of object”Python OpenCV: Saving Video from Webcam
In this tutorial we will learn how to read frames from a webcam and save them in a video file, using Python and OpenCV.
Continue reading “Python OpenCV: Saving Video from Webcam”ESP32: Query mDNS service
In this tutorial we will check how use a ESP32 to query a service advertised with mDNS. The tests from this tutorial were done using two DFRobot ESP32 development boards.
Continue reading “ESP32: Query mDNS service”Python OpenCV: Converting camera video to black and white
In this tutorial we will learn how to obtain video from a webcam and convert it to black and white, using OpenCV and Python.
Continue reading “Python OpenCV: Converting camera video to black and white”ESP32 Arduino: Set static IP address
In this tutorial we are going to learn how to setup a static IP address for our ESP32, using the Arduino core. The tests from this tutorial were done using a DFRobot’s ESP32 module integrated in a ESP32 development board.
Continue reading “ESP32 Arduino: Set static IP address”ESP32: Advertise service with mDNS
In this tutorial we are going to learn how to advertise a network service available on the ESP32 using mDNS, and get information about that service on a Python program. The tests from this tutorial were done using a DFRobot’s ESP32 module integrated in a ESP32 development board.
Continue reading “ESP32: Advertise service with mDNS”ESP32: mDNS address resolution
In this tutorial we will learn how to use mDNS to resolve the address of a HTTP web server hosted by the ESP32. The tests from this tutorial were done using a DFRobot’s ESP32 module integrated in a ESP32 development board.
Continue reading “ESP32: mDNS address resolution”JavaScript: Computed property names
In this tutorial we will check how use computed property names to create objects with property names that result from computing an expression.
Continue reading “JavaScript: Computed property names”Python Requests: Disable SSL validation
In this tutorial we will learn how to disable SSL validation using Python Requests library.
Continue reading “Python Requests: Disable SSL validation”