NB-IoT event organized by Comet electronics on December 4th

LTE_NB-IOT

NB-IoT is one of the promising LPWAN technologies I review in both my Industry 4.0 and OpenFest 2018 talks.

It’s lightweight LTE technology which has only 48 bytes of payload and 30kbps up and down link. Some call it 0G.

NB-IoT is specified by 3GPP standartization organization, same which standartize 2G/3G/4G/5G. It works flawless with existing cellular technologies with simplified RF and processing.

With these high speeds and small payloads the average consumption of NB-IoT make it more efficient even than LoRa, but there is many things to consider in your design.

First is that NB-IoT never will reach LoRa price point, it will be always about x2 more expensive.

Second – some modules like for instance the popular Ublox SARA-N2  which cost EUR 11 for 250 pcs, can’t work at lower than 2.75V power supply. Most Lithium batteries capacity is quoted with battery discharge from 3V to 2V so these modules will work only with fraction of the capacity of Lithium batteries. They are designed to operate from 2.75 to 4.2V i.e. targeting LiPO re-chargeable batteries, but these will never stay charged for 10 years as NB-IoT technology promises, so this is really odd design choice by Ublox.

Another thing to take into consideration is the high current pulses which LTE technology introduce (up to 2A when link is established). So even on paper NB-IoT to looks better than LoRa it still could be implemented with compromises where these benefits to be not seen.

Fortunately some Chinese vendors (like Quectel) made their modules BC66 to work from 2.1V.

Comet Electronics is organizing on December 4th NB-IoT event together with the first cellular operator which implements NB-IoT connectivity in Bulgaria – A1 and with Chinese module supplier Quectel.

It would be interesting to touch and evaluate this technology which is relatively new, has no infrastructure and is dependent by subscription fees only.

NB-IoT Gateways are not expensive and cost about $2000, but you can’t use them unless you have licensee to operate at GSM frequency (and these licensees cost millions of EUROs at least here in Bulgaria) so you can use your gateway only in Faraday cage :). This is where LoRa technology shine and this is what makes it so popular! No subscription, no fees for data transport, everyone can run his own gateway.

This is also one of the reason NB-IoT infrastructure is not so well developed – the investment is small, but the mobile operators still can’t figure out how to squeeze money out of this. There are already several providers on the net which sell NB-IoT SIM cards with EU roaming and with low cost like $12 per year, but local operators will find a way to shut these down and take their share.

Electronica 2018 highlights – AI, Smart Solutions, Communication and Security

electronica2018

Electronica in Munich trade fair is the most important meeting place for the electronics industry. Last week more than 3000 exhibitors and 80 000 visitors met together .

What was very visible this years is that beside the traditional big number of German companies the second biggest by number of companies exhibitor was China. There were both big:

cnbig

 

and small companies:

cnsmall

Artificial intelligence, Machine Learning, Smart solutions, Connectivity and security were dominating topics among the exhibitors.

LoRa and NB-IoT solutions were present on almost every fifth booth 🙂

The slides from Industry 4.0 meeting in Stuttgart are online

zve-frauenhofer

Open Source / Free Software for Effective Industry 4.0 Meetup  organized by Nexedi GmbH  and hosted by Fraunhofer IAO was held on 12th of November in Stuttgart.

There were quite interesting talks mostly focused on Open Source Technologies and their possible use in Industry 4.0.

My slides are now uploaded at Slideshare.

MicroPython running on ESP8266-EVB driving MOD-IO and MOD-IO2 relays

mod-io2-details.png

New tutorial how to use ESP8266-EVB with Micropython and to switch on/off relays and read ADC values on MOD-IO2 from MCHobby.be

The biggest FOSS/OSHW event in Bulgaria – Open Fest is 3-4 of November

Screenshot from 2018-10-11 08-20-10

Our favorite Open Source event – OpenFest is approaching. Every time I go there I do wonder how small Bulgaria attracts so many people there – thousands of people meet together. Probably the answer is that IT is developing very well and lot of people in Bulgaria work in IT industry.

I’m really pleased to announce that my proposal to talk about LoRa/TTN/LoRaWAN myths, possibilities, applications and limitations is approved! I will try to compare all popular LPWAN solutions, why LoRa is leading there (hint: open source 😉 ) and how you can calculate your power requirements, link budged etc to make sure your application will work with years on battery.

Open Source / Free Software for Effective Industry 4.0 Meetup by Nexedi GmbH and Fraunhofer IAO on November 12th, 2018 in Stuttgart with Amarisoft, Linutronix, Olimex and Télécom ParisTech

Smart-Factory

On 12th of November in Stuttgart at Fraunhofer IAO (Nobelstraße 12, 70569 Stuttgart, GERMANY) will be held “Open Source / Free Software for Effective Industry 4.0 Meetup”  organized by Nexedi GmbH and hosted by Fraunhofer IAO.

Olimex will present there Open Hardware solutions for Industrial Automation.

 

 

New ESP32 Development board in stock ESP32-DevKit-Lipo target handheld applications with build in LiPo charger

ESP32-DevKit-LiPo

ESP32-DevKit-Lipo is pin to pin compatible with Espressif ESP32-CoreBoard (ESP32-DevKitC) board, but adds additional LiPo charger and battery connector, allowing board to work from LiPo battery when external power supply is missing.

Tomorrow 16.10 at SofUnitConf in Paradise Center in Sofia we will have Workshop with this board to show how easily it could be programmed with JavaScript and Espruino.

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