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Software & Coding Articles
Page 29 of 83
How to log in to the Azure account using Az CLI command in PowerShell?
To login to the Azure account using Azure CLI, we need to use the az login command. Once you type the az login command, it will prompt for the Azure portal login console.If you need to log in with the device authentication code in the browser, you need to use the parameter –use-device-code.PS C:\> az login --use-device-code To sign in, use a web browser to open the page https://microsoft.com/devicelogin and enter the code ‘DeviceCode’ to authenticate.You need to open a website https://microsoft.com/devicelogin/ and have to enter a code. If you are not already connected with the Microsoft Azure portal, you ...
Read MoreHow to get the Application security groups of the Azure VM using PowerShell?
To get the Application security groups of the Azure VM using PowerShell, we need to first get the Network Interface of the Azure VM.The below command will retrieve the NIC name of the Azure VM.PS C:\> $vm = Get-AzVM -Name TestVM $nic = (($vm.NetworkProfile.NetworkInterfaces.id).Split('/'))[-1]Once we have the NIC name, we can use the Get-AzNetworkInterface command to retrieve the NIC information and the Security group.The below command will retrieve the application security group names using PowerShell.PS C:\> $nicsettings = Get-AzNetworkInterface -Name $nic $nicsettings.IpConfigurations.ApplicationSecurityGroups
Read MoreHow to retrieve the Azure subnets connected to the virtual network using PowerShell?
To get all the subnets attached to the virtual network using PowerShell, we need to use the GetAzVirtualNetwork command.PS C:\> $vn = Get-AzVirtualNetwork -Name VirtualNetworkNameTo get the Subnets and its address prefix details, you need to filter out the Subnets and AddressPrefixPS C:\> $vn.Subnets | Select Name, AddressPrefix
Read MoreHow to find the file modified after a certain date using PowerShell?
To get all the files that are modified after certain days, we need to use the LastWriteTime property.The below command shows us the files which are modified within the last 30 days in the C:\temp folder.Get-ChildItem C:\Temp | where{$_.LastWriteTime -ge (GetDate).AddDays(-30)}You can also use the AddMonths() or AddYears() instead of AddDays() as per your requirement.To get all the files that are modified before 30 days, use the below command.Get-ChildItem C:\Temp | where{$_.LastWriteTime -le (GetDate).AddDays(-30)}To get the file modified after a specific date, you need to compare the LastWriteTime with the Date. For example, we need all the files that are ...
Read MoreArduino Time Library Introduction
The Time library provides you with timekeeping functionality on the Arduino. The latest version of the library is documented here.To install it, search for Time in the Library Manager and install the library by Michael Margolis.You’ll have to scroll a bit to find this library.Once the library is installed, if you go to File → Examples → Time, you will be able to see several examples of integrating this library with various sources: GPS, NTP, RTC, etc.The basic idea is that you can set time using the functions −setTime(hours, minutes, seconds, days, months, years);OR, setTime(t);where t is the special time_t ...
Read MoreBrowse Arduino libraries by Category on Arduino Website
Follow the steps given below to browse Arduino libraries by category on Arduino website −Go to http://arduino.cc/Click Documentation → ReferenceClick Libraries from the left menu.The libraries can now be found in the categorized form on this pageClick the category of your interest and explore the available libraries.
Read MoreReference and dereference operator in Arduino
The reference (&) and dereference operators (*) in Arduino are similar to C. Referencing and dereferencing are used with pointers.If x is a variable, then its address is represented by &x.Similarly, if p is a pointer, then the value contained in the address pointed to by p is represented by &p.Examplevoid setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.println(); int x = 10; int *p; p = &x; //p now contains the address of x Serial.print("The value stored in the address pointed by p is: ");Serial.println(*p); } ...
Read MoreDeep sleep in Arduino
The equivalent of deep sleep in Arduino would be the Power Down mode, which consumes the least power out of all the sleep modes. While this has already been covered in another article, but for the sake of completeness, here’s a brief on the sleep modes in Arduino.Arduino’s microcontroller, ATmega328P has 6 sleep modes, of which 5 are available with the avr/sleep.h library.Idle modeADC Noise ReductionPower-downPower-saveStandbyExtended StandbyEach mode has different wake-up modes and different power consumption.The Idle mode is easiest to wake up from and the Standby and Power down mode is the most difficult to wake up from (you ...
Read MoreMake the Arduino sleep and then wake up
In this article, we will, as the title suggests, make the Arduino sleep, and wake it up using an interrupt. Arduino’s microcontroller, ATmega328P has 6 sleep modes, of which 5 are available with the avr/sleep.h library. Each mode has different wake-up modes and different power consumption.Arduino’s microcontroller, ATmega328P has 6 sleep modes, of which 5 are available with the avr/sleep.h library.Idle modeADC Noise ReductionPower-downPower-saveStandbyExtended StandbyEach mode has different wake-up modes and different power consumption.The Idle mode is easiest to wake up from and the Standby and Power down mode is the most difficult to wake up from (you can only ...
Read MoreReal Time Clock (RTC) with Arduino
An RTC module keeps track of time once an initial time input is provided to it. This input can come from several sources (NTP, GPS, etc.). The RTC module usually comes with its own crystal oscillator, and even its own battery, so that the timekeeping continues, even if there is a power disturbance on the Arduino.Circuit Diagram −We will use the DS3231 module. It uses I2C for communication (SDA and SCL lines). The circuit diagram is shown below −As you can see, the Vcc pin of DS3231 is connected to 5V, GND to GND, SDA to A4 (SDA) and SCL ...
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