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ARDUINO YUN REV 2 開發板 YUN R2 雲 支援乙太網路與 WIFI 連線
Arduino Yun Rev 2 是新系列Arduino 開發板的新成員，該板結合了Linux的功能和Arduino的特性簡單性。它結合了Leonardo模型晶片（ATMega32U4）和運行基於OpenWRT的Linux發行版Linino的SOC（片上系統）模組。最有趣的功能之一是它支持有線以太網和Wifi網絡。Arduino晶片已連接到Linux模組，因此它們之間的通信非常容易，並將繁重的過程委派給板載的Linux機器。
Arduino Yun Rev 2 連接性：
它具有兩個網絡連接。一個10/100 mbps以太網網絡和另一個可以作為客戶端或接入點安裝的Wifi（IEEE 802.11 b / g / n，2.4GHz）。
處理器之間的連接：
為了將小型ATMega32U4與Linux模組進行通信，使用了Bridge庫，這使事情變得更加容易，並且由Arduino團隊直接提供支持。AR9331的串行端口通過針腳0和1連接到32U4的串行端口。AR9331的串行端口是對CLI控制台的訪問，該控制台允許啟動進程並直接從控制台檢索消息。默認情況下已經預先安裝了幾個文件系統管理和管理軟件包（包括Python解釋器），並且橋接庫還允許您使用同一系統安裝和啟動自己的應用程序。最有趣的優點之一是 Arduino Yun Rev 2 板（在32U4側）可以由Wifi通過Linux模組直接編程。
這是一塊可以讓你實現各種可能性的開發板子。還應注意，它具有MicroSD內存插槽，可讓您在其上存儲數據，例如網頁，日誌或我們需要的任何其他東西，從而進一步擴展了開發板的可能性。
ARDUINO YÚN REV 2特性：
- 微控制器：ATmega32u4
- 工作電壓：5V
- 輸入電壓：5V
- 數字引腳：20
- PWM通道：7
- 模擬輸入：12
- 通過I / O引腳的直流強度：40 mA
- 3V引腳的DC電流：50 mA
- 閃存32 KB（其中4 KB用作引導加載程序）
- SRAM：5 KB
- EEPROM：1 KB
- 時鐘速度（AVR）：16 MHz
- Atheros AR9331處理器
- 架構：MIPS @ 400MHz
- 工作電壓：3V
- 以太網IEEE 802.3 10 / 100Mbit / s
- WiFi IEEE 802.11b / g / n
- USB Type-A：0主機/設備
- 讀卡器：僅限Micro-SD
- 內存：64 MB DDR2
- 閃存：32 MB
- 3af兼容PoE
教學文件與入門文件
ARDUINO YÚN REV 2
Arduino Yún Rev 2 is a Microcontroller Board based on the Microchip Technology ATmega32U4 8-bit Microcontroller and the Qualcomm Atheros AR9331 Processor. The Atheros Processor supports a Linux distribution based on OpenWrt named LininoOS. The board has built-in 802.3 10/100Mbit/s Ethernet and Wi-Fi® 802.11b/g/n 2.4GHz, making it ideal for connected IoT (Internet of Things) applications. Connection to a Wi-Fi or wired network is simple thanks to the YÚN Web Panel and the dedicated ”YunFirstConfig” sketch. Using the Yún Web Panel it is also possible to configure all the shield-related features and remotely upload sketches on the board connected to the shield. The Yún Rev 2 uses the Bridge library, extending the functionalities of the Microprocessor by using the computational power of the Linux processor on the board.
The Yún Rev 2 offers a space saving hoizontal Micro USB port and full USB 2.0 host, and a low-profile Ethernet 10/100 RJ45 port, designed to avoid potential short circuits when used with shields. Additional features include a microSD card slot, 20 digital input/output pins (7 of which can be used as PWM outputs and 12 as analog inputs), a 16MHz crystal oscillator, an ICSP header, 4 on-board status LEDs, and 3 reset buttons.
The hardware, software, and documentation of the Yún Rev 2 is freely available and open-source. This means that developers can learn exactly how it’s made and use its design as the starting point for their own projects.
FEATURES
- Microcontroller: Microchip Technology ATmega32U4
- Operating Voltage: 5V
- Input Voltage: 5V
- Digital I/O Pins: 20
- PWM Output: 7
- Analog I/O Pins: 12
- DC Current per I/O Pin: 40mA on I/O Pins; 50mA on 3,3 Pin
- Flash Memory: 32KB (4KB used by bootloader)
- SRAM: 2.5KB
- EEPROM: 1KB
- Clock Speed: 16MHz
- Processor: Qualcomm Atheros AR9331
- Architecture: MIPS
- Operating Voltage: 3.3V
- Ethernet: 802.3 10/100Mbit/s
- Wi-Fi: 802.11b/g/n 2.4GHz
- Card Reader: MicroSD
- RAM: 64MB DDR2
- Flash Memory: 16MB
- Clock Speed: 400MHz
- LininoOS
- Software stack updated to OpenWRT latest version, including all patches
- SSL support on the bridge Arduino / Linux bridge
- LEDs
- ON (green): indicates that the shield is properly powered
- WLAN (blue): indicates a connection to a wireless network
- WAN (red): indicates connection to ethernet
- USB (white) : indicates system activity and/or if a USB key is mounted
- Board dimensions: 73mm x 53mm
• Clock speed: 400 MHz.
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