python News - Page 18 of 22 - CNX Software

January 20, 2017January 20, 2017 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

$30 BakeBit Starter Kit Adds Sensors & Buttons to Your NanoPi NEO & NEO Air Boards

FriendlyElec (previously FriendlyARM) launched NanoPi NEO and then NanoPi NEO Air board as respectively Ethernet and WiFi/Bluetooth connected boards for IoT applications. But so far, there was no ecosystem around the board, you had to use your own sensor modules, and write your own software to control them. This has now changed with the launch a BakeBit Starter Kit with twelve sensor modules, a NanoHat Hub add-on board designed for NanoPi boards, as well as BakeBit Library to control the hardware. The NanoHat Hub plugs into the two NanoPi NEO headers and provide 12 headers with 3x I2C interfaces, 3x analog interfaces, 2x UART interfaces, and 4x digital interfaces among which D3 and D5 support PWM, compatible with SeeedStudio Grove modules. You then have a choice of 12 modules to connect to the NanoHat Hub: OLED Module Ultrasonic Module Green LED Module Red LED Module LED Bar Module Rotary Angle […]

November 24, 2016 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

39 Euros FiPy Board Supports Sigfox, LoRa, LTE Cat M1/NB1, Bluetooth 4.2, and WiFi (Crowdfunding)

Long range LPWAN solutions have just started to hit the market, and there are so many standards such as Sigfox and LoRa that it’s difficult to know who will eventually be the winner, or if different standards will co-exist over the long term, and in a general sense it might not be so easy to decide which one is best suited to your project without experimenting first. Pycom has a solution to this problem, as they’ve made a board similar to LoPy with WiFi, Bluetooth, and LoRa, but instead included 5 long and short range IoT protocols: Sigfox, LoRa, LTE Cat M1 & Cat NB1, Bluetooth, and WiFi. Pycom FiPy board specifications: SoC – Espressif ESP32 dual core Tensilica L108 processors @ up to 160 MHz with BT 4.2 and WiFi System Memory – 4MB RAM Storage – 8MB flash memory Connectivity WiFi 802.11 b/g/n @ 16 Mbps up to […]

November 20, 2016November 20, 2016 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

A Closer Look at Ingenu RPMA Alternative to LoRa or Sigfox LPWAN Standards & RPMA Development Kit

I’ve recently started to write a bit more about long range LPWAN standards for IoT applications, especially LoRa and Sigfox, as commercial networks are being launched, and relatively low cost hardware platforms are being introduced to the market. There are also other highly expected standards such as Weightless and LTE Cat M that will bring more competition to the market. Ingenu RPMA (Random Phase Multiple Access) is another available standard that’s been in deployment for a while, and based on an earlier comparison of long range LPWAN standards, it comes with long range, supports up to 384,000 nodes per “sector”, operates in the unlicensed 2.4 GHz ISM band, and offers high combined uplink and downlink bandwidth than competitors. Ingenu recently contacted me and provided some more details and information about their technology and development kit. One of the documents includes an “independent analysis completed by ABI Research, Inc.” comparing features […]

November 15, 2016August 22, 2023 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

GR-LoRa is a Reverse-Engineered Open Source Implementation of LoRa PHY

LPWAN standards such as LoRa or Sigfox allow you to transmit data over long distance, at ultra low power (up to 10 years on a AA battery), and for free if your use your own network (P2P or gateway), or a few dollars per years if you go through a network provider. The low cost is possible since those standards rely on 900 MHz ISM bands, meaning nobody has to pay millions of dollars to the government to obtain a license fee. Matt Knight looked at LoRa, and while Level 2 and 3 of the protocol (LoRaWan) has public documentation, Level 1 (LoRa PHY) is proprietary and the standard is proprietary. So he decided to reverse-engineer LoRa PHY using Microchip RN2903 based LoRa Technology Mote and Ettus B210 USB software defined radio, and software packages and tools such as Python and GNU Radio to successfully deliver GR-LoRa open source “GNU Radio […]

October 3, 2016October 3, 2016 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

How to check HTTP Header and Connection Stats from the Command Line

A few days ago, I discussed with somebody whether a file was cached by Cloudflare or not, and this involved getting the HTTP header, and checking for CF-RAY field to see if data is going through one of Cloudflare data centers. This can be done with curl:

curl -svo /dev/null http://www.cnx-software.com
* Rebuilt URL to: http://www.cnx-software.com/
*   Trying 104.28.19.95...
* Connected to www.cnx-software.com (104.28.19.95) port 80 (#0)
> GET / HTTP/1.1
> Host: www.cnx-software.com
> User-Agent: curl/7.47.0
> Accept: */*
> 
< HTTP/1.1 200 OK
< Date: Mon, 03 Oct 2016 09:57:17 GMT
< Content-Type: text/html; charset=UTF-8
< Transfer-Encoding: chunked
< Connection: keep-alive
< Set-Cookie: __cfduid=d90ff49c11865e8fda1331c2977559f521475488637; expires=Tue, 03-Oct-17 09:57:17 GMT; path=/; domain=.cnx-software.com; HttpOnly
< X-Powered-By: PHP/5.5.9-1ubuntu4.19
< Expires: Wed, 11 Jan 1984 05:00:00 GMT
< Cache-Control: no-cache, must-revalidate, max-age=0
< Pragma: no-cache
< X-UA-Compatible: IE=edge
< Link: <http://www.cnx-software.com/wp-json/>; rel="https://api.w.org/"
< Server: cloudflare-nginx
< CF-RAY: 2ebf876da273114d-SIN
< 
{ [2307 bytes data]
* Connection #0 to host www.cnx-software.com left intact

curl -svo /dev/null http://www.cnx-software.com

* Rebuilt URL to: http://www.cnx-software.com/

* Trying 104.28.19.95...

* Connected to www.cnx-software.com (104.28.19.95) port 80 (#0)

> GET / HTTP/1.1

> Host: www.cnx-software.com

> User-Agent: curl/7.47.0

> Accept: */*

< HTTP/1.1 200 OK

< Date: Mon, 03 Oct 2016 09:57:17 GMT

< Content-Type: text/html; charset=UTF-8

< Transfer-Encoding: chunked

< Connection: keep-alive

< Set-Cookie: __cfduid=d90ff49c11865e8fda1331c2977559f521475488637; expires=Tue, 03-Oct-17 09:57:17 GMT; path=/; domain=.cnx-software.com; HttpOnly

< X-Powered-By: PHP/5.5.9-1ubuntu4.19

< Expires: Wed, 11 Jan 1984 05:00:00 GMT

< Cache-Control: no-cache, must-revalidate, max-age=0

< Pragma: no-cache

< X-UA-Compatible: IE=edge

< Link: <http://www.cnx-software.com/wp-json/>; rel="https://api.w.org/"

< Server: cloudflare-nginx

< CF-RAY: 2ebf876da273114d-SIN

{ [2307 bytes data]

* Connection #0 to host www.cnx-software.com left intact

In the command above, -s stands for silent so that curl does not show the progress meter, -v stands for verbose to show the header, and -o /dev/null is used to discard the packet load. You can also use -I option (fetch the HTTP-header only) with curl, which – if all you need is the HTTP header – provides a cleaner output:

curl -I http://www.cnx-software.com
HTTP/1.1 200 OK
Date: Mon, 03 Oct 2016 10:06:51 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Set-Cookie: __cfduid=d4dda8a9ec8370cf0950d26e5faf37cc21475489211; expires=Tue, 03-Oct-17 10:06:51 GMT; path=/; domain=.cnx-software.com; HttpOnly
X-Powered-By: PHP/5.5.9-1ubuntu4.19
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
Pragma: no-cache
Set-Cookie: bb2_screener_=1475489211+1.1.174.2+1.1.174.2; path=/
X-UA-Compatible: IE=edge
Link: &lt;http://www.cnx-software.com/wp-json/&gt;; rel="https://api.w.org/"
Server: cloudflare-nginx
CF-RAY: 2ebf9574c129081d-SIN

curl -I http://www.cnx-software.com

HTTP/1.1 200 OK

Date: Mon, 03 Oct 2016 10:06:51 GMT

Content-Type: text/html; charset=UTF-8

Connection: keep-alive

Set-Cookie: __cfduid=d4dda8a9ec8370cf0950d26e5faf37cc21475489211; expires=Tue, 03-Oct-17 10:06:51 GMT; path=/; domain=.cnx-software.com; HttpOnly

X-Powered-By: PHP/5.5.9-1ubuntu4.19

Expires: Wed, 11 Jan 1984 05:00:00 GMT

Cache-Control: no-cache, must-revalidate, max-age=0

Pragma: no-cache

Set-Cookie: bb2_screener_=1475489211+1.1.174.2+1.1.174.2; path=/

X-UA-Compatible: IE=edge

Link: <http://www.cnx-software.com/wp-json/>; rel="https://api.w.org/"

Server: cloudflare-nginx

CF-RAY: 2ebf9574c129081d-SIN

I also came across httpstat Python script recently via n0where, doing much of the same thing, except it also adds transfer statistics. It can be installed by downloading httpstat.py, or better using pip:

sudo pip install httpstat

1	sudo pip install httpstat

Let’s try it with this very […]

August 27, 2016August 27, 2016 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

Getting Started with ReSpeaker WiFi IoT Board’s Audio Capabilities, Voice Recognition and Synthesis

ReSpeaker is a development board combining an Atmel AVR MCU, a MediaTek MT7688 WiFi module running OpenWrt, a built-in microphone, an audio jack, and I/O headers to allow for voice control and output for IoT applications. That means you could make your own Amazon Echo like device with the board and add-ons, use it as a voice controlled home automation gateway and more. The board was launched on Kickstarter a few days ago, and already raised $100,000 from about 100 backers, but I’ve received an early sample, so I’ll provide some more information about the firmware, and shows how to use with some Python scripts leveraging Microsoft Bing Speech API. You’ll need a micro USB to USB cable to connect your to computer (Linux, Windows, Mac OS…), and a speaker to connect to the board. Linux (OpenWrt) boots in a few seconds, and once it’s done all RGB LED will […]

July 20, 2016 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Onion Omega2 is a $5 Linux WiFi IoT Board (Crowdfunding)

Onion Omega board was first introduced in 2015. The tiny OpenWrt Linux board featured an Atheros AR9331 processor with GPIO headers, and various baseboards and add-ons. The company has now launched a Kickstarter campaign for the second versions – Omega2 & Omega2 Plus – with a faster processor @ 580 MHz, compatible with docks and add-ons boards used for Omega, and a much lower price with $5 for the Omega2, and $9 for Omega2 Plus with more storage and memory. Omega2 & Omega2 Plus specifications: WiSoC – 580 MHz processor, possibly Mediatek MT7688 MIPS processor used in LinkIt Smart 7688 System Memory Omega2 – 64MB Omega2 Plus – 128MB Storage Omage2 – 16MB flash Omega 2 Plus – 32MB flash + micro SD slot Connectivity Built-in – 802.11 b/g/n WiFi with on-board and external antenna support Via add-on boards – Bluetooth 4.0 LE, GPS, and 2G/3G Expansion – 15x GPIO, […]

June 17, 2016 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

The Eclipse Foundation Releases Open Source Smart Home & IoT Gateway Frameworks, MQTT & oneM2M Implementations

The Eclipse Internet of Things (IoT) Working Group has released – or soon will be releasing – four open source projects for the Internet of Things with Eclipse SmartHome 0.8 framework, Eclipse Kura 2.0 IoT gateway framework, Eclipse Paho 1.2 MQTT & MQTT-SN clients, and Eclipse OM2M 1.0 implementation of oneM2M standard. Eclipse SmartHome 0.8 Eclipse SmartHome is a framework for smart home solutions that runs on embedded devices, including Raspberry Pi, BeagleBone Black or Intel Edison development boards. The latest SmartHome 0.8 release includes a new REST API and corresponding “Paper UI” administration interface, support for new devices including Sonos speakers, LIFX bulbs, Belkin WeMo devices, digitalSTROM systems, EnOcean devices (via a new OSGi EnOcean Base Driver) and others, as well as a new rule engine supporting templates for beginners, JavaScript for automation rules and graphical rule editors. You can find more details on Eclipse SmartHome page, and/or download SmartHome 0.8, […]