sigfox
In many occasion some of my Sigfox prototypes has been in movement with difficulties to emit ; many source can cause this but basically from discussions with specialists speed is not a close friend of Sigfox technology.
As a quick test is always better than a long theorical discussion, tonight, I took my car and made some tests.
This post details the test of Sigfox running in a car at different speed.
Sigfox has just published a documentation on the technical basis of the network. This pdf document is a good summary of all what you need to know to get start on the technology.
The document is attached here Sigfox technical overview
To complete this overview you can also take a look to my different post & video
New episode of my LPWAn post series, this time, about the network architecture and the role of the network kernel.
The network architecture is different than a classical IP communication from client to server: the LPWAn architecture is based on a kernel network allowing the protocol transformation from the Sigfox / LoRaWan world to the IP-Internet world.
In the LPWAn protocol the addressing is limited to one device address only to reduce the frame size and as a consequence all the frame have to be captured by a central system: the network kernel. It will route the message correctly to the end user application based on device association made on registration.
This post is related to a french video (as usual) and detailed in the following part of this post.
Sigfox has announced end of last week the opening of the device Geo-location service. This solution allows to get the location of a device based on its radio signal.
Different announced has been made in this domain by Sigfox and its competitors LoRaWan. The technics in place are not the same and the Sigfox solution is based on BigData.
From the beginning Sigfox was returning a device location based on the signal measured by the different base-stations. This location was previously rounded to the nearest lat/lng degree. This information has a precision of 100km x 150km basically. Even if it was not possible to locate a device precisely, i was interesting to know in what country corner it was located.
With the service launched in February 2017 Sigfox is moving to a more precise location based on radio signal, according to different discussions I had the precision goes from a couple of meters to some kilometers depending on situation, data already gathered at this position, number of antennas …
The downlink process is the way a sensor can receive data from the network. This process is really useful if you need the device to execute an action or if you want to change the sensor behavior.
This post is as some other of my LpWan series a video post in French completed by this text post in english.
The RF 868MHz is a public bandwidth European Low Power Networks (LPWAN) as Sigfox and LoRaWan are using for communicating.
This bandwidth is regulated by different norms like ERC-REC-70-3E in Europe and have national norms in relation. In France ARCEP 2014-1263 seems to be the last one validated in the JO on the 30th of January 2015. The following video is a second episode of my VLOG on LPWan technologies. As usual, the video is in French but this post will give you a overview in english.
This post is a VLOG entry, as usual in French, you will find the english text version in the next part of the post.
Basically, I’m explaining how the two LPWAN technologies : Sigfox and LoRa use the radio frequency to communicate with a low power consumption in a wide area environment.
In this video you will find a mix of demonstration with voice to highlight how it works with day-to-day life example and spectrum capture of both technology to visualize how it looks like.
I just got them at home ! The new Sigfox module with a low cost approach based on the OnSemi AX-Sigfox-D chip is now ready and available for being delivered. With a price less than $3 per module for a quantity of 10 this module offer a low cost access to the Sigfox network.
In this post I’ll describe the first step with this module.