Author Archives: Paul

Kerlink Wirnet iZeptoCell

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Kerlink iZepToCell

The new baby in Kerlink family has arrived, it’s iZeptoCell ! Ok, I’m a bit late to write this blog post and it came alive a couple of months ago. When I say baby, I really mean baby, no due to its age but more related to its size !

This LoRaWan gateway is really small and can take place in any indoor environment looking like a sensor but providing a wide range connectivity for many devices deploy around. This is a really good option to cover a small / medium company floor up to a building.

This gateway exists with an Ethernet connectivity like the one I’m testing and with a Cellular connectivity, something appreciated when corporate IT dislike having devices on the corporate network.

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Fix Postgresql data corruption “invalid page in block … of relation base/16384/…

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Bad news yesterday after a power failure on a server, impossible to restart my Helium ETL service: the database has been corrupted and the service is failing with the message “invalid page in block 54206178 of relation base/16384/186119818”

I had to spend time on the web and chatGPT wasn’t helping me (I’m kidding, this bot is stupid) to find a correct way to solve this, luckily, this has been resolved and here is the way I did it.

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Seeed WioTerminal AI grove camera

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In this tutorial, we will see how to make an image clustering based AI with the Seeed Wio Terminal and the Grove AI camera. There are different tutorial on this, the main source of this tutorial is located here. The purpose of this is to have a step by-step approach for my student to realize this in a limited time they have.

This is based on SeeedStudio K1100 development kit.

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Deploy Dragino LPS8 (DATAONLY) on Helium

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LPS8

The Dragino LPS8, LoRaWAN gateway is a helium ready device you can add to Helium as a Data-Only. It means it does not participate to PoC but earn HNT for transferring traffic.

It’s not a ready-to-go data-only, so you need to register the hotspot in the helium block-chain on your own but it run the gateway-rs software internally.

This device as been designed for Helium, but not only, it can be connected to TTN or another different network, like a private network. The installation with Helium network is not really complicated but you will need to process some command on a terminal and manipulate wallet-cli.

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Installing ChirpStack LoRaWan network server for Helium

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ChirpStack is an open-source LoRaWAN network server that is being use in a coming future with Helium as a replacement of the console. This blog post explains how to install it with the companion solution I’ve built to interact with Helium router.

The Helium Chirpstack environment is still in Beta. This blog post will not be fully complete until the prod phase and you still see this orange banner. You can take a look at this post if you are curious, you will use it if you are part of the beta test. For the rest, it’s batter to come later (some part a voluntary missing).

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Industrial IoT (IIoT) vs IoT for industry (IoT4i)

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You heard these terms, increasingly used, that are IoT (Internet of Things) and IIoT (Industrial IoT). Terms that seem so close that we tend to think that they are intimately linked, or even that they address the same thing but in a different context, which for the second would be that of industry. But the technicians, or marketers, are teasing or, because they surf the trends, it tends to generate misleading shortcuts.

You understand, behind my words, that there is no more than a fairly distant cousinship between IoT and IIoT. I will try to explain why and what are the consequences of these differences on the technologies used in each of these areas.

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Repair broken Nebra indoor with eMMC failure

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The first versions of Nebra indoor miner came with CM3 (Raspberry Pi Compute Module) embedding eMMC memory. As you may know, Helium has been really I/O intensive, particularly this summer when the blockchain was filling really fast the small amount of storage the CM3 has. As a consequence, all my Nebra indoor miner dead around the same week. Diagnostic seemed to be a storage failure.

Here is the story about making them live again

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Distributed computers – Threefold

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ThreeFold.io project

Many different crypto project are running decentralized computing as it’s a good piece to complete the distributed storage or messaging I previously documented. The principle is to be able to deploy a workload on someone else computed to serve a reliable web service. This layer is a IaaS layer like we can find on Azure, Aws, GCP, Ovh… This layer is an important piece of a decentralized cloud in construction in the web3.

I already written review of project like Flux, Golem, Akash previously and explain how to contribute to them and how use the one that seems the more reliable. This new blog post is about an other solution named Threefold

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