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Arduino Articles
Page 2 of 18
Compound operators in Arduino
Compound operators in Arduino work just like in C, and they help save you some writing time, and also reduce the number of lines in your code. As the name seems to suggest, compound operators combine multiple operators.The following table lists the compound operators in Arduino.Assume that a and b are integers having values a = 5 and b = 2 in all the following examples −OperatorDescriptionExampleOutput++Incrementa++a=6--Decrementa--a=4+=Compound Additiona+=ba=7-=Compound subtractiona-=ba=3*=Compound multiplicationa*=ba=10/=Compound divisiona/=ba=2%=Compound remaindera%=ba=1&=Compound bitwise ANDa&=ba=0|=Compound bitwise ORa|=ba=7^=Compound bitwise XORa^=ba=7
Read MoreConvert variables from one type to another in Arduino
In order to convert variables from one type to another, you use the CAST operator. The syntax is −(type) var;Where var is the variable to be casted, and type is the new type to which you wish to convert it. For example, if you have a variable of type float, and wish to cast it as an int.ExampleHere’s how you can do it −float f; int i; void setup() { // put your setup code here, to run once: f = 5.6; i = (int) f; Serial.println(f); Serial.println(i); } void loop() { ...
Read MoreArduino Uno vs Teensy
We will have a comparison of the specifications of Arduino Uno and the Teensy 3.5 board.Arduino UnoTeensyPlease refer to the table below for the detailed comparison −UnoTeensy3.5GeneralDimensions2.7¨ x 2.1¨2.5¨ x 0.7¨Pricing$20-23$25-28ConnectivityI/O Pins1442PWM Pins620Analog Pins625ComputingProcessorATMega328PMK64FX512VMD12Flash Memory32 kB512 kBSRAM2 kB256 kBEEPROM1 kB4 kBClock speed16 MHz120 MHzVoltage Level5V3.3V (though all pins are 5V tolerant)USB ConnectivityStandard A/B USBMicro-USBCommunicationHardware Serial Ports16SPI SupportYes (1x)Yes (3x)CAN SupportNoYesI2C SupportYes (1x)Yes (3x)Apart from the points mentioned above, as you can see from Teensy 3.5’s visual, it has a builtin SD Card Holder. It also has a Cryptographic Acceleration Unit, Real Time Clock and CRC Computation Unit. Its microcontroller is ...
Read MoreArduino Uno vs ESP32
We will have a comparison of the specifications of Arduino Uno and the ESP32 DevKit v1 DOIT BoardArduino UnoESP32Please refer to the table below for the detailed comparison −UnoESP32GeneralDimensions2.7¨ x 2.1¨2¨ x 1.1¨Pricing$20-23$10-12ConnectivityI/O Pins1436PWM Pins616Analog Pins6Up to 18 *Analog Out Pins (DAC)2ComputingProcessorATMega328PXtensa Dual Core 32-bit LX6 microprocessorFlash Memory32 kB4 MBSRAM2 kB520 kBEEPROM1 kB-Clock speed16 MHzUpto 240 MHzVoltage Level5V3.3VUSB ConnectivityStandard A/B USBMicro-USBCommunicationHardware Serial Ports13SPI SupportYes (1x)Yes (4x)CAN SupportNoYesI2C SupportYes (1x)Yes (2x)Additional FeaturesWiFi-802.11 b/g/nBlueTooth-v4.2 BR/EDR and BLETouch Sensors-10CAM* Only 8 can be used along with WiFiThe above table itself would have driven home the point that ESP32 is hands-down much better than ...
Read MoreArduino Uno vs Arduino Due
We will have a comparison of the specifications of Arduino Uno and the Arduino Due BoardArduino UnoArduino DueUnoDueGeneralDimensions2.7¨ x 2.1¨4¨ x 2.1¨Pricing$20-23$40-42ConnectivityI/O Pins1454PWM Pins612Analog Pins612Analog Out Pins (DAC)-2ComputingProcessorATMega328PAT91SAM3X8EFlash Memory32 kB512 kBSRAM2 kB96 kB (split in two banks of 64 kB and 32 kB)EEPROM1 kB-Clock speed16 MHz84 MHzVoltage Level5V3.3VUSB ConnectivityStandard A/B USBMicro USBCommunicationHardware Serial Ports14SPI SupportYesYesI2C SupportYesYesNote that the Due board differs from other Arduino boards in terms of voltage level. The microcontroller in Arduino due runs at 3.3 V instead of 5 V (common in most other boards). If you connect a higher voltage to the pins, you may end ...
Read MoreArduino Uno vs Arduino Nano
We will have a comparison of the specifications of Arduino Uno and the Arduino Nano Board.Arduino UnoArduino NanoPlease refer to the table below for the detailed comparison −UnoNanoGeneralDimensions2.7¨ x 2.1¨1.77¨ x 0.7¨Pricing$20-23$20-21ConnectivityI/O Pins1422PWM Pins66Analog Pins68ComputingProcessorATMega328PATmega328Flash Memory32 kB32 kBSRAM2 kB2 kBEEPROM1 kB1 kBClock speed16 MHz16 MHzVoltage Level5V5VUSB ConnectivityStandard A/B USBMini USBCommunicationHardware Serial Ports11SPI SupportYesYesI2C SupportYesYesAs you can see, the Nano board is very similar to Uno, but compact.
Read MoreDifference between hardware serial and software serial in Arduino
A hardware serial, as the name suggests, denotes that a dedicated piece of hardware (UART) enables Serial communication. In Arduino Uno, for instance, pins 0 and 1 have UART support, and they are connected to the USB via a USB-to-UART converter. That facilitates communication between your computer/laptop and the Arduino. While Arduino Uno has a single Hardware Serial, other boards like Mega have multiple. They are accessed using Serial, Serial1, Serial2, and so on.You can have a look at an example of using Multiple Hardware Serials by going to File → Examples → Communication → MultiSerialSoftware serial is a library ...
Read MoreHow to define a class in Arduino?
You can define a class in Arduino just like in C, with public and private variables and methods.The example below demonstrates the definition of a Student class, which has the constructor, two methods (add_science_marks and get_roll_no) and 3 private variables, _division, _roll_no and _science_marks.Exampleclass Student { public: Student(char division, int roll_no); void add_science_marks(int marks); int get_roll_no(); private: char _division; int _roll_no; int _science_marks; }; Student::Student(char division, int roll_no){ _division = division; _roll_no = roll_no; } void ...
Read MoreIntroduction to Arduino Online Editor
Don’t have Arduino IDE installed on your machine, but still want to write Arduino code? Alternatively, don’t have access to your machine, but still want to program boards with your code? Come in Arduino Online Editor. Head on to www.create.arduino.cc/editorYou will be asked to Sign Up if you are visiting this page for the first time. Complete the Sign Up formalities, and login.You will be greeted with a screen like this one −As you can see, this is very similar to the offline Arduino IDE. You can select the board and port (more on the port later), you can write ...
Read MoreArduino Uno vs Raspberry Pi
We will have a comparison of the specifications of Arduino Uno and the STM32 Blue Pill Board.Arduino UnoRaspberry PiArduino Uno and Raspberry Pi are in different leagues altogether. Arduino is a microcontroller, while R-Pi is a Single Board Computer. R-Pi comes with its own operating system. Arduino has no OS, it can simply run programs compiled for the Arduino platform (which means C and C++ programs in general). There is no point comparing the two, but still let’s see the difference in specs, to drive the point home.Arduino Uno has 2 kB of SRAM. The first model of R-Pi had ...
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