When you have a DHT11 sensor, you will be able to get the temperature and humidity of your environment.
Given that, this post shows how to use ESP32 development board to read temperature and humidity from a DHT11 sensor.
When you have an old Windows machine, you can convert it into an IOT gateway.
So how can we read sensor data with our windows machine? Since our windows machine probably do not have GPIO pins, we can read sensor data via an intermediary device.
For example, we can first attach an Arduino Uno or ESP32 development board as the intermediary device to our windows machine via USB. Given that connection, the intermediary device will read the sensor data and send those values via serial. On our Windows machine, we can then run a program to read those values from serial.
So how can we read sensor data from Arduino or ESPx via serial connection on our Windows machine? Since C# is a programming language for creating windows application, we can use C# to read those data from serial.
When you have an API endpoint that generates a QR Code image, another device with a QR Code scanner will be able to get the encoded value to perform some action. For example, WhatsApp web generates a QR Code image that encodes a code for WhatsApp app to sign in the user.
So how can you create an API endpoint that generates a QR Code image? With this in mind, let’s look at how we can do so with Python 3 Flask-RESTPlus and python-qrcode.
When you use a virtual environment to run your application, you isolate the dependencies in its own container.
In such a situation, you can ensure that your application can run alongside other applications with incompatible dependencies.
Therefore, I always favour the use of virtual environment for running my Python applications.
With this in mind, this is a story about preparing a virtual environment to run a gpiozero based project on Raspbian Stretch.
When you want to detect movement of your IOT project, you can use an ADXL345 accelerometer. With this in mind, let’s look at how we can use a ESP32 development board to read from an ADXL345 accelerometer.
When you have a DHT22 / AM2302 sensor, you will be able to get the temperature and humidity of your environment.
Given that, this post shows how to use ESP32 development board to read temperature and humidity from a DHT22 sensor.
When you want to implement a low cost IOT solution with bluetooth interface, you can consider using a ESP32 development board. In addition to the bluetooth interface, the ESP32 development board also includes a WiFi interface.
In order to run a program on the ESP32 Development Board, we will need to write our program into the flash memory of the development board. Since it is easy to write code and flash programs with Arduino IDE, it is a good tool to use with the ESP32 Development Board.
In case you need it, this post shows how to enable ESP32 development on Arduino IDE.
When you have work as a software developer, you will encounter many problems that you spend quite some time solving. For example, if you are looking to setup a Raspberry Pi web server to host your PHP application, you may take hours.
On the other hand, you may spend time in finding the parts needed to build a camera prototype that take pictures at the push of a button.
As I had said in why should programmers blog, blogging enables you to revisit your past solutions to solve current problems.
In addition, when you had written a good number of articles, the Internet will probably reward you with substantial viewership.
At this point in time, you may probably think of ways to earn some money to pay the running costs of your website.
So what are some easy and effective ways for programmers’ websites to earn money? In case you are a programmer who owns a website, here are some easy and effective ways to earn money.
When you are building a browser-based game, being able to track key presses is helpful.
For this purpose, you can register a JavaScript function that gets called when the browser detects a key is being pressed.
After the browser detects a key press, it will send information about the key to your function.
When your function is able to get the key that is pressed, it can then use this information to update the game state.
In this post, let’s look at how we can detect keyboard presses made to the browser screen with JavaScript.
© 2010 - 2019 Techcoil.com: All Rights Reserved / Disclaimer
Follow us