COVID19 Mechanical Ventilators (COVID-19) This post is not about IOT technologies. As the COVID-19 pandemic is unfolding, I have been researching into mechanical ventilators and trying to understand what makes them so difficult and expensive to produce.
Bluetooth Bluetooth protocol cheat sheet This is a very simplified summary of the bluetooth protocol. Useful for quick reference. Physical layer: Modes There are 4 modes for Bluetooth. Mainly : BR 1Mbps (Basic Rate) : GFSK Peak to average : 0dB
IOT news A good article on the limitation and what is missing in 802.11ax: 802.11ax is not Great in-depth post by Dean Bubley's updated post on Cryptocurrencies and Telecom: Update: Telecom & Network
Create a rails app on Ubuntu 14.04 Get the pre-requisite: sudo apt-get update sudo apt-get install -y build-essential libssl-dev libyaml-dev libreadline-dev openssl curl git-core zlib1g-dev bison libxml2-dev libxslt1-dev libcurl4-openssl-dev nodejs libsqlite3-dev sqlite3 mkdir ~/ruby cd ~/ruby wget http://cache.ruby-lang.
rails Install a rails app on Digital Ocean in 15minutes with passenger-install-nginx-module Learn how to migrate your ruby-on-rails app from Heroku to Digital Ocean. Even thought this post is not directly related to IOT technologies, running a webserver/webapplication is often required. Running on Heroku
Computing trends: Are we moving away from the Cloud? With the crypto craze going on this is a good opportunity to reflect on the computing trends in the last 30 years. At the beginning was cloud computing: It started with cloud computing
Creating a rails app on Digital Ocean in 15minutes Learn how to migrate your ruby-on-rails app from Heroku to Digital Ocean. UPDATED VERSION IS HERE Even thought this post is not directly related to IOT technologies, running a webserver/webapplication is often
Creating 2 ghost blogs on a single droplet In this post you will learn : How to configure 2 blogs running on the same droplet How to configure a ghost blog on Digital Ocean This blog now runs on Digital Ocean. In
security Krack Attack. The first major WPA2 flaw Today was the release a major WPA2 flaw. It's the first a flaw in the protocol is found (as opposed to flaws due to weak passwords). The flaw was discovered in July this
Iot 5 Startups for September 2017 Here's a few IOT startup I came Beep Network : Headquarters : San Francisco Beep Networks Cloud connected wireless sensors using LoRa radios. They are selling the hardware devices and providing complete solutions. Mode: www.
news Weekly news (Aug 1st 2017) Here are some news article related to IoT. These links are a bit old, but some are still very relevant. Bluetooth mesh release* Chip revolution will bring better VR sooner you think/ New
wifi data rates Wifi data rates Here are the data rates for 802.11n and 802.11ac for a single spatial stream for 20MHz. 20Mhz BW has 52 subcarriers. MCS Nb subcarriers NBits Coding rate Symbol duration Mbps Symbol
Good e-books on wifi The IEEE 802.11 specification can be hard to read (since it is very detailed). If you are new to wifi or even if you want to deepen your expertise, here are a
virtual reality Best wireless technology for virtual reality (VR)? In this post, we will review the different technologies for VR. VR Requirements: For VR there are 2 key requirements: Latency Bandwidth Let's look at each of those requirements and estimate which wireless
Max data rate for wifi The short answer is the following : 802.11n : 600Mbps 802.11ac : 6033 Mbps 802.11ax : 9608 Mbps Note that these are PHY speeds. PHY speeds is only part of the story, since it
6 Established IoT startups to look for (June 2016) Every month, we will post our top list of established startups to look for. We defined established start-up as being a few years old and have raised at least a series A. In
How fast is wifi supposed to be (simple answer) We will show the theoretical speed you can achieve with an iPhone or MacBookPro with a state of the art router (802.11ac). Hardware Iphone 6: 433 Mbps Iphone 6s or Macbook Pro
Book review 2016 Here are the book recommended for learning about IOT: IOT is a big field. It goes from embedded devices to fundamental wireless technologies to M2M. I’ll try to break down the book
Why 802.11ax matters 802.11ax matters. This is not just another marketing trick to make you buy a new router (although it is true that you will need to buy one). Its goal is to increase