mạng cảm biến là con đường để đi nếu bạn có theo dõi dữ liệu về môi trường như nhiệt độ trong một khu vực rộng. Thông thường, bạn cần một số cơ sở hạ tầng, bao gồm các máy chủ để liên lạc, lưu trữ dữ liệu, và những thứ tương tự và để quản lý mạng và làm cho các dữ liệu cảm biến sẵn. This session shows how you could build a sensor network, including the infrastructure, based on embedded devices only. It uses several embedded devices such as a Raspberry Pi, a BeagleBone Black, a Cubieboard2, and an i.MX6-based Cubox-i. The idea is to use cheap standard devices in combination with Java technology to realize a sensor network. In addition, it shows mobile clients, such as a smartwatch, for visualizing the sensor network data.
Gerrit Grunwald is working as a software engineer at Canoo Engineering AG (Basel, Switzerland). He is responsible for visualizations of all kinds. His technical interests include Java desktop software development and specifically the subareas – JavaFX, Java Swing and HTML5 controls.
He‘s a decent frequent blogger, founder and leader of the Java User Group in Münster (Germany), where he‘s also living.
He has been involved in the IT industry since 1996, when he started studying Applied Physics at the University of Applied Sciences Münster (Germany).
View more trainings by Gerrit Grunwald at https://www.parleys.com/author/gerrit-grunwald
Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials nguồn
BeagleBone Black gains $50 4.3-inch cap touchscreen Cape
BeagleBone Black Wireless hurries up development
When you’re thinking of development boards, it’s not just about the Arduino and Raspberry Pi. The TI-friendly BeagleBone is there in the mix, too, struggling for your attention
Which is a justified reason to talk about some developments around the BeagleBone Black single-board computer: there’s the new version and 2 new Capes from the BeagleBone team.
As well as the BeagleBone Black Wireless (listed below), you will also find 2 brand new ‘cape’ add-on boards for the existing BeagleBone Black.
BeagleBone Black Wireless
Foremost, the BeagleBone Black Wireless, which is for the most part a BeagleBone Black with on-board 802.11 b/g/n 2.4GHz Wi-Fi as well as Bluetooth. It’s following in the route of the Raspberry Pi 3 by building in Wi-Fi support to streamline wireless communications.
Its powerplant is the Texas Instruments Sitara AM3358 1GHz ARM Cortex-A8
“Similar to the BeagleBone Black, the wireless maintains HDMI output, serial debug port, PC USB interface, USB 2.0 host, reset and power control buttons, and brings 2 more status LEDs for WiFi and also Bluetooth,” states BeagleBone.org.
“Also kept is the 4GB of on board eMMC memory with Debian Linux preinstalled, enabling the BeagleBone Wireless to boot in approximately Ten seconds and have you developing through the browser in fewer than Five min’s making use of simply a single USB cable.”
You can look at the specifics of the board by expanding the graphic above, and a data sheet is the following for download.
Take note that it marks the introduction of the Octavo OSD3358 SiP, integrating BeagleBone functionality into one BGA package.
Go and visit its features and benefits with this weblink http://www.mouser.com/new/octavo-systems/octavo-systems-osd335-sip/
Considering that we’re speaking about plastic card-sizes peices of kit, space is required to be made for extra features. This in essence means this particular BeagleBone has displaced its 10/100 Ethernet port, producing space for a TI WL1835 WiLink wi-fi interface.
The full specifications:
:: AM335x 1GHz ARM Cortex-A8
:: SGX530 graphics accelerator
:: NEON floating-point accelerator
:: 2x PRU 32bit 200MHz micro-controllers
:: WiLink 1835 802.11b/g/n 2.4GHz WiFi, Bluetooth, plus Bluetooth Smart Module
:: USB client: power, debug and device
:: USB host
:: Micro HDMI output
:: 2x 46 pin headers
:: 512Megabyte DDR3 800Megahertz RAM
:: 4GB Inserted eMMC Flash with Debian Distribution pre-installed
:: micro sd card Slot
:: Cloud9 IDE on Node.js w/ BoneScript library
Not forgetting the the two new capes…
Wireless Cape addon
Notice that the new Wireless Cape takes BeagleBone Black above the abilities of BeagleBone Black Wireless, points out Steve Bush in his news piece on the release. It’s powered by Texas Instruments WiLink 8 (WL1837) industrial dual-band (2.4GHz & 5GHz), 2×2 MIMO Wi-Fi, Bluetooth and Bluetooth Smart (otherwise known as Bluetooth LE), that also comes with Zigbee and NFC.
The cape unfolds with Debian Distribution pre-installed and 4GB of on board eMMC Flash memory. “Designers might be developing employing their browser in less than Five min’s by means of just one single USB cable,” said Farnell.
Display cape addon
Note there’s yet another Display cape addon sold. It provides connections for a 4.3in. color touch-screen an LED backlight and capacitive overlay “for a mobile-like interface”.
The cape is aimed at interactive projects, embedded systems and standalone set ups.
Pricing is approximately ￡55 for the BeagleBone Black Wireless, ￡35 for the display cape addon as well as, ￡44 for the wireless cape addon .
Purchase on Amazon . com site
BeagleBone Black Wireless Starter Kit- Contains : BeagleBone Black Wireless With WiFi and Bluetooth–Clear Case–Power Supply–Micro USB Cable