A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
a programming language. Use this tag for questions regarding how to use Python with your Arduino, or on using of pySerial or such software. Also consider using [programming] and other specif…
a type of memory available on most boards. It is used for storing persistent data. Use the tag for questions about the EEPROM library or the hardware.
refer to the radio portion of the electromagnetic spectrum which is used for wireless communication. Strictly speaking though, RF can refer to any oscillation (elect…
Using an Arduino to play noise, sounds, or music. Also for questions about audio input.
a 6DOF. In other words it has 6 Degrees Of Freedom, 3 axes of acceleration (x, y, z) and 3 axes of rotational movement (yaw, pitch, roll). It uses the I2C protocol.
Is a standard library function. It returns the number of milliseconds since the Arduino board began running the current program.
Real-Time Clock. Keeps track of current date/time. Some have batteries like the DS3231, and the DS3231 also has programmable alarms that can interrupt an Arduino.
an application level network protocol that is used for the transfer of content on the World Wide Web.
Integrated Development Environment - software that allows you to write and compile code. Use the arduino-ide tag for questions about the official Arduino software.
an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another
a cheap and powerful development board with some Arduino compatibility.
Sleep refers to a form of power management, where the processor can be instructed to enter various levels of "sleep". Use this tag for discussions about sleep mode.
describe the act of (often wirelessly) controlling another system.
For questions about integrating the Arduino microcontroller with the single-board computer Raspberry Pi. Questions just about Raspberry Pi are off-topic but can be asked on Raspberry Pi Stack Exchange…
either on or off (high or low, one or zero). This contrasts with analog signals which have a range of values.
Defines how often something occurs, such as pulses in a digital signal, or oscillations in a radio wave.
The process of improving the efficiency of a program such that is uses less memory and/or less computational time.
For questions about communication or data transfer between Arduino and Android devices. General Android questions can be asked on Android.SE.
an open source operating system (OS) that is lightweight and runs on many systems. It also runs on the Arduino Yún. There are different "flavors" or "distros" (distributions and changes made …
to ask programming questions regarding reading input from it or blinking the lights, etc.
Electronic component forming a three-terminal resistor with a sliding contact. Acts as a variable resistor / voltage divider, manipulating the amount of current flowing through it.
In-system programming (ISP) refers to the ability of chips to be programmed while installed in the system.
A custom structure in C++ (and various other languages) which can contain member data and functions. An instance of a class is called an object.