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Merge branch 'jhansson-ard/trademark-updates' of https://github.com/arduino/docs-content-private into jhansson-ard/trademark-updates
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content/arduino-cloud/07.api/04.python/python.md

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tags: [Python, Arduino Cloud]
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---
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The Python Client for connecting to the Arduino Cloud is known as the [Arduino Cloud Python Client](https://github.com/arduino/arduino-iot-cloud-py) library. This library is implemented to support MicroPython, CircuitPython as well as regular Python running on your personal computer / Linux machine (like Raspberry Pi).
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The Python Client for connecting to the Arduino Cloud is known as the [Arduino Cloud Python Client](https://github.com/arduino/arduino-iot-cloud-py) library. This library is implemented to support MicroPython, CIRCUITPYTHON® as well as regular Python running on your personal computer / Linux machine (like Raspberry Pi).
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Connection via this client is achieved by registering a [manual device](/arduino-cloud/hardware/devices#manual-devices), i.e. a virtual device that is not associated with an Arduino hardware board. This virtual device can connect through a simple username/password (Device ID, Secret Key) which is generated in the Arduino Cloud when configuring a device.
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content/hardware/01.mkr/01.boards/mkr-gsm-1400/tutorials/arduino-mkr-gsm-1400-and-dtmf/arduino-mkr-gsm-1400-and-dtmf.md

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### Hardware Connections
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As you can see from the breadboard layout, a transistor is present between the Arduino board and the NeoPixel input. This is placed since the MKR GSM 1400 operates at 3.3V while the NeoPixel works at 5V. The transistor is used as a voltage translator. In the layout, there is also a single NeoPixel placed instead of the ring just for the sake of simplicity.
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As you can see from the breadboard layout, a transistor is present between the Arduino board and the NEOPIXEL® input. This is placed since the MKR GSM 1400 operates at 3.3V while the NEOPIXEL® works at 5V. The transistor is used as a voltage translator. In the layout, there is also a single NEOPIXEL® placed instead of the ring just for the sake of simplicity.
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## Setup
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content/hardware/02.hero/boards/uno-r4-wifi/tutorials/cheat-sheet/cheat-sheet.md

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***The Qwiic connector on the UNO R4 WiFi is connected to the secondary I2C bus (IIC0), which uses the `Wire1` object rather than the `Wire` object. Please note that the Qwiic connector is 3.3 V only.***
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The UNO R4 WiFi features a Qwiic/STEMMA connector that you can use to connect modules, often allowing you to daisy chain several modules and control all of them through a single connector.
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The UNO R4 WiFi features a Qwiic/STEMMA® connector that you can use to connect modules, often allowing you to daisy chain several modules and control all of them through a single connector.
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Qwiic or STEMMA are both names for a type of connector developed by SparkFun and Adafruit respectively, which bundles the I2C pins of a development board and breakout modules. What this means is that if you have a development board (such as for example the Arduino UNO R4 WiFi) and a breakout module, and both have a Qwiic or STEMMA connector, you can hook them up together and with absolutely minimal wiring you can quickly create multi-faceted projects.
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Qwiic or STEMMA® are both names for a type of connector developed by SparkFun and Adafruit® respectively, which bundles the I2C pins of a development board and breakout modules. What this means is that if you have a development board (such as for example the Arduino UNO R4 WiFi) and a breakout module, and both have a Qwiic or STEMMA® connector, you can hook them up together and with absolutely minimal wiring you can quickly create multi-faceted projects.
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If your breakout board features more than one of these connectors, which many do, you can use the second one to daisychain *another* Qwiic module to add another interactive node to your project.
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content/hardware/03.nano/boards/nano-every/tutorials/community-projects/community-projects.md

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***Videos and external links found in this article are not maintained by Arduino. You can visit the [official documentantion for Nano Every](/hardware/nano-every).***
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## NeoPixel Driver Without Bit-Banging
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## NEOPIXEL® Driver Without Bit-Banging
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<iframe width="100%" height="400" src="https://www.youtube.com/embed/1e2MVGAVbZM" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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This great video from [Elektor](https://www.elektor.com/) shows how to create a NeoPixel driver through the Custom Configurable Logic (CCL) block. It also serves as a nice introduction to the Nano Every board!
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This great video from [Elektor](https://www.elektor.com/) shows how to create a NEOPIXEL® driver through the Custom Configurable Logic (CCL) block. It also serves as a nice introduction to the Nano Every board!
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## Turntable For 7" Records
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content/hardware/03.nano/boards/nano-rp2040-connect/tutorials/rp2040-01-technical-reference/rp2040-01-technical-reference.md

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Since our upload procedure relies on the Raspberry’s bootloader using a mass storage device, if your computer is fast enough during an upload, it can notify you about an USB removable being plugged.
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When a sketch is uploaded successfully, the mass storage of the Nano RP2040 Connect may be visible in the operating system. The mass storage should only appear for a few seconds, then it will automatically close.
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When this occurs, we can force the ROM bootloader mode, which will enable mass storage, allowing us to upload UF2 images like CircuitPython / MicroPython or a regular Arduino sketch.
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When this occurs, we can force the ROM bootloader mode, which will enable mass storage, allowing us to upload UF2 images like CIRCUITPYTHON® / MicroPython or a regular Arduino sketch.
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### Forcing Bootloader
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content/learn/05.communication/01.wire/wire.md

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### Qwiic & STEMMA QT
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When delving into the market of breakout modules and sensors, you'll find that there are entire ecosystems, where standards are built around the I2C protocol. Examples of such standards are Qwiic, developed by Sparkfun, and STEMMA QT, developed by Adafruit®. Both Qwiic and STEMMA QT use a 4-pin JST SH connector for I2C devices, making it easier for third parties to design hardware with vast compatibility. By having a standardized connector, you'll know that if you see the word Qwiic or STEMMA QT in association with an item, that it will work together with an Arduino board with a Qwiic or STEMMA QT connector, such as the UNO R4 WiFi.
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Both Qwiic and STEMMA QT bundle together wires for power, ground, as well as the SDA and SCL wires for I2C, making it a complete kit, one cable that bundles everything together.
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Both Qwiic and STEMMA® QT bundle together wires for power, ground, as well as the SDA and SCL wires for I2C, making it a complete kit, one cable that bundles everything together.
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![I2C on a Qwiic/STEMMA QT connector with UNO R4 WiFi](./assets/Qwiic.png)
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![I2C on a Qwiic/STEMMA® QT connector with UNO R4 WiFi](./assets/Qwiic.png)
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**But what's the difference between the two?**
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Both Qwiic and STEMMA QT use I2C, and even when inspecting modules using the two standards up close, it may be difficult to tell what makes them unique from each other. But there is a difference! And it has some implications on how and for what you may use them.
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Both Qwiic and STEMMA® QT use I2C, and even when inspecting modules using the two standards up close, it may be difficult to tell what makes them unique from each other. But there is a difference! And it has some implications on how and for what you may use them.
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Qwiic has level shifting and voltage regulation on the controller (but not on the peripherals). What this means is that Qwiic is 3.3 V logic **only**. This makes it easier to use, as for the end user, there is one less thing that can go wrong when designing and assembling your circuit.
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STEMMA QT, on the other hand, doesn't have this. This lets you use both 3.3 V and 5 V logic for modules. This also means that there is one more thing you may need to consider when creating your circuit, but it also grants some more flexibility in power and logic requirements.
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STEMMA® QT, on the other hand, doesn't have this. This lets you use both 3.3 V and 5 V logic for modules. This also means that there is one more thing you may need to consider when creating your circuit, but it also grants some more flexibility in power and logic requirements.
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The pin order for STEMMA QT is designed to match the pin order for Qwiic, enabling cross-compatibility between the two standards.
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The pin order for STEMMA® QT is designed to match the pin order for Qwiic, enabling cross-compatibility between the two standards.
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### Grove
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Grove is another connector standard, this one developed by seeed studio. You can find a plethora of modules with a Grove connector, however only some of them use I2C.

content/learn/06.hardware/nicla-form-factor/nicla-form-factor.md

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Nicla boards are designed for the following three use cases:
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- **Standalone** - Nicla boards can be used as a traditional Arduino board on which the user can load the final application. In this scenario Nicla's microcontroller is executing the whole application and its interfaces can be used to communicate to external sensors and actuators
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- **ESLOV peripheral** - Nicla boards can be connected through the ESLOV connector, consisting of 5 pins including an I2C bus, power supply and a GPIO. Through this connector the board can be interfaced with MKR boards directly or, via adapter cables, to other boards exposing similar interfaces such as QWIIC, STEMMA/STEMMA QT and GROVE. Nicla boards are provided with a readymade firmware which abstracts sensors and allows reading high level measurements processed by Nicla main processor.
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- **ESLOV peripheral** - Nicla boards can be connected through the ESLOV connector, consisting of 5 pins including an I2C bus, power supply and a GPIO. Through this connector the board can be interfaced with MKR boards directly or, via adapter cables, to other boards exposing similar interfaces such as QWIIC, STEMMA®/STEMMA® QT and GROVE. Nicla boards are provided with a readymade firmware which abstracts sensors and allows reading high level measurements processed by Nicla main processor.
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- **MKR Shield** - Nicla boards can be fitted on a MKR board as a shield. In this scenario MKR would be running the main application and would communicate with Nicla through I2C as it would do via ESLOV.
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- **Wireless** - Nicla boards can be battery operated and can communicate wirelessly to a central processor. As in other use case scenarios Nicla would be processing sensor data and provide high level processed information.
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ESLOV is a 5 pin connector available on MKR and Portenta boards and can be used to connect to a Nicla via cable. Through this connector the board can be interfaced with MKR and Portenta boards directly or, via adapter cables, to other boards exposing similar interfaces such as QWIIC, STEMMA/STEMMA QT and GROVE. Nicla boards are provided with a readymade firmware which abstracts sensors and allows reading high level measurements processed by the Nicla's main processor.
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ESLOV is a 5 pin connector available on MKR and Portenta boards and can be used to connect to a Nicla via cable. Through this connector the board can be interfaced with MKR and Portenta boards directly or, via adapter cables, to other boards exposing similar interfaces such as QWIIC, STEMMA®/STEMMA® QT and GROVE. Nicla boards are provided with a readymade firmware which abstracts sensors and allows reading high level measurements processed by the Nicla's main processor.
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**Pinout**
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content/micropython/02.micropython-course/course/08.examples/modules/lis3dh.py

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# MicroPython LIS3DH Accelerometer Library
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# Authors: Matt Trentini, Seon Rozenblum
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# Based on the Adafruit LIS3DH Accelerometer CircuitPython Driver
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# Based on the Adafruit® LIS3DH Accelerometer CIRCUITPYTHON® Driver
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# Based on the Arduino LIS3DH driver from:
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# https://github.com/adafruit/Adafruit_LIS3DH/
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# Author: Tony DiCola

content/retired/08.hacking/02.hardware/building-an-arduino-on-a-breadboard/building-an-arduino-on-a-breadboard.md

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This configuration is similar to the one above but the trick is that the Atmega chip is bootloaded with the Arduino Lilypad bootloader. The Lilypad runs using the internal clock instead of an external clock and so removes the need for much of the supporting circuitry.
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[Boarduino by Ladyada](http://www.ladyada.net/make/boarduino/)
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[Boarduino by LADYADA®](http://www.ladyada.net/make/boarduino/)
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The Boarduino is a kit you purchase and assemble to create a nice, small breadboard compatible Arduino set up. All the common components are included on a small PCB so that the Boarduino can easily be added to a breadboard and even removed, in a snap.
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