Tag Archives: LoRa

First steps with LoRa Radio Node (Arduino)

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The LoRa Radio Node is an AVR Arduino board with a RFM95 LoRa module. This all-in-one LoRa module allows to have a LoRaWan device for a reasonable price around 15€. You need to add a battery (like a LS14500 3,7V battery) on the battery holder for a 4€ extra cost to make it mobile. LiPo option are also available using the power connector. Even if the connectors are looking like grove, they are not compatible so you will have to make your own wiring to connect extensions.

This post is reviewing how to getting started with this board to fire your first LoRaWan frame over The Things Network.

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HopeRF RFM95 and arduino a low cost LoRaWan solution

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The HopeRF RFM95w module proposes to access LoRa at low cost. Its unitary price is around 4€ on shop like aliexpress. A version with a shield is also existing. Its name is Lora1276-C1 from niceRF. These different transceivers are using Semtech SX1276 chip. It makes this kind of chip interesting for regional low cost LoRaWAN design in association with a MCU. Here we are going to use it with an Arduino platform.

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Configure Adeunis field test device on The Things Network (TTN)

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The Adeunis Field Tester is a simple way to make test on a LoRaWan network. The device provide GPS information, temperature and an accelerometer to activate communications.

The device is big but it have a screen and you can have a direct feedback of the transmissions on the screen. It make it good for testing coverage manually. You can also program it to send messages periodically and easily put it in a car to create coverage maps thanks to the embedded GPS.

The following post explains how to set it to use it with TheThingsNetwork (as for any other network by-the-way).

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IoT introduction

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This IoT class is an introduction to IoT and LPWAN, it has been made to be a 2x2h teaching session for engineer school students. This class has been given to I.S.I.M.A. school in Clermont-Ferrand in 2017. This class has been completed by 2 more hours on the backend part for IoT by Daniel Petisme. It has been followed by three industrial conferences.

The content of my class had the following slides (in French):

Introduce why IoT is a revolution compared to M2M and why service matter. Introduce the different phases of a connected object design and the involved technologies. Introduce the challenge, from the technical stand point to the business model considerations.

Introduce the LPWAn technologies, presenting Sigfox and LoRaWan solutions.

 

Kerlink LoRaWan Wirnet iFemtoCell review

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LPWA networks needs antennas and gateway to receive the device communication and transfer them to a network kernel. You can take a look to my post on the LPWA network architecture for more details.

In the LoRaWan ecosystem we call the first part of this network architecture a gateway. There are different kind of gateway : The network operator gateway with a big and efficient antenna, capable to support external weather like the Kerlink IoT Station and some low costs solution you can deploy at home or within a building (indoor) to cover a local device fleet.

The Kerlink Wirenet iFemtoCell device is a such type of gateway. this post will review how to get start with it and what we can expect in term of coverage.

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Let’s be part of The Things Network with a Kerlink LoRa IoT station

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The Things Network (TTN) is a global LoRaWan public network kernel based on crowd-source infrastructure. This initiative sounds really interesting in my point of view because it breaks one of the main LoRaWan issues : the country based operators organization.

Related to this good point, the negative point is the current area covered by a such network limited to the contributor localization, generally in the main cities.

That said, I’m convinced : when you want to create a private LoRaWan network you have to manage a network kernel managing gateways, device authorizations… You can do it yourself, you can pay someone to do it for you or, eventually, you can lever TTN for this use. As a counterpart you will extend the network and offer this benefit to any around. That way it makes sense and gives large opportunities to the networks and it’s private users.

Long introduction for a technical topic … How to join this network once you have a Kerlink LoRa Iot station available ? Continue reading →

All what you need to know about regulation on RF 868MHz for LPWan

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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.

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Learn about Sigfox and LoRa radio technologies

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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.

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