wireless networking, free software, solar power


25 years experience in internet technology at large 20 years experience in networking at large speciality: wireless networking Networks for science, IoT, environmental sensing air pollution, water monitoring, and more LoRaWan, specifically The Things Network community-driven data Free and open source software IT Security System administration Extensive international experience and networks, predominantly in Africa and […]

Remarks on Enabling The Things Network for InfluxDB

Two weeks ago i had the pleasure of teaching LoRa, LoRaWan, The Things Network (TTN) at the Joint ICTP-IAEA School on LoRa Enabled Radiation and Environmental Monitoring Sensors. The only thing unfortunate was the timing that had me miss David G. Simmons’ teaching just a few days later. While i was showing Node-RED as a […]

Huawei brings 1Gbps internet to danish households

While this is not really a political item, just a technology decision: it is however remarkable, against the current backdrop of world affairs, cyberwars, etc – Huawei Partnership Brings 1 Gigabit Speeds Across Denmark

Non-free basics, half the net, bread vs cake, and more

My NSRC colleague Steve Song has this excellent write-up Resolving the Free Basics Paradox on the Indian governments decision to effectively ban Facebook’s “free” internet offering. I will only add two aspects – slightly underrepresented, imho – to the discussion: 1/ Not Free Nothing new here: It is commonplace knowledge by now that “free” of […]

Building microscope from old broken mobile phone

This might not be strictly wireless, but it s a good use of DIY technology anyway: old mobile phones make excellent microscopes, for use in telemedicine  (e.g. blood checks), water quality monitoring, etc. The cost is almost zero – apart from the phone itself, everything can be built from scrap parts. This model here loosely […]

Can You Power a Phone With a Capacitor? And, can we understand that?

“There was a recent news item regarding a teenager’s project to use a super capacitor as a quick-charging energy storage device. The primary claim is that this could be used to fully charge a phone in just 30 seconds.” http://www.nbcnews.com/technology/teens-invention-could-charge-your-phone-20-seconds-1C9977955 Luckily, Wired put a physicist on the case, and he discusses this in much length. […]

Raspberry Pi – first boot

1. Physical connections DVI screen, network, usb keyboard, power. 2. Prepare SD card I m using Debian Squeeze as supplied here: http://downloads.raspberrypi.org/download.php?file=/images/debian/6/debian6-19-04-2012/debian6-19-04-2012.zip It s the “image we recommend you use. It’s a reference root filesystem from Gray and Dom, containing LXDE, Midori, development tools and example source code for multimedia functions.” Downloaded it, insert SD […]

Testing new fitPC2i

Install Ubuntu Desktop 10.04.2 on fitPC2i Insert HD Insert bootable USB with Ubuntu With 2microUSB on front panel – you have 4 USB total – nice. Installs without problem. user: kopan password: br34th3 Wireless not recognized.* Run full update, a.o. new kernel packages * We will try this guide: http://xlcwu.wordpress.com/2010/07/09/build-rt3070-kernel-module-on-ubuntu-10-04-lucid-lynx/ Install Ubuntu Desktop 10.10 on […]

IPv6 tunnel via gogo6 on Ubuntu 9.10

The following is a short summary guide on making a ipv6 tunnel via http://gogonet.gogo6.com/ work on Ubuntu 9.10 Karmic Koala, for those of us who are not on 10.10 yet. It makes no assumptions about whether tunneling instead of going generic IPv6 is a good thing to do, or whether it just makes us become lazy and put […]

Free low tech video serving

Notes on open source low cost video streaming The requirements are: * free open source solution * no budget * low bandwidth * absolutely NO hosted solution, no centralized components (in other words – no skype, no youtube, no “your hosted service”) * live and archive Open Source streaming options VLC icecast Mediatomb Kaltura (hosted, […]

keep looking »