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Setting the Record Straight: PinePhone Misconceptions
I take no pleasure in writing this blog post. In fact, even as I am writing these words I am internally torn on whether this is the right approach to addressing the problem on hand. Whether I’ve chosen the right approach remains to be seen, but regardless, I now feel it’s time to confront misconceptions about the PinePhone.
The Rat - компилятор C-- для AVR
Как показывает практика, написать максимально эффективный код под микроконтроллеры AVR можно только на ассемблере. Примеры плохой оптимизации кода AVR GCC приводились тут. Писать же код на ассемблере - сложно, а зачастую очень сложно (некоторые мысли о причинах этой сложности приведены там же. И сложность эта усугубляется примитивностью компиляторов ассемблера, дающие слишком мало возможностей программисту по написанию легко читаемого кода. При написании ассемблерного кода возникает желание иметь более удобный синтаксис, похожий на синтаксис Си, где вместо мнемоник ассемблера можно использовать привычные и более читаемые конструкции. Подобно тому, как это делается в...
PinePhones Start Shipping - All You Need To Know
Welcome to 2020. I expect this will be a productive year and one of exponential growth for our community. It was a busy beginning to the year and I expect that the pace will remain high with shipments of the Pinebook Pro and PinePhone Braveheart edition as well as FOSDEM announcements. Following this period there will be downtime due to the Chinese New Year. The past 12 months have been so intense that I am genuinely looking forward to this period of relative calm, which will allow everyone to catch their breath and review how things are going. I find...
Анализатор качества воздуха на ардуино
Прибор предназначен для контроля качества воздуха в помещении и отображения таких параметров, как температура, влажность, содержание CO2 а также выявления загрязнения воздуха угарным газом (CO), табачным дымом, парами спирта, ацетона, формальдегидов и других токсичных газов. “Сердцем” устройства является Seeeduino Nano - клон Arduino, присалнный на обзор компанией Seeed Studio.
Плата Seeeduino Nano поставляется в картонной коробке и выглядит следующим образом:
Отличительной особенностью этой платы является использование разъёма USB type-C и преобразователя USB-UART на базе микросхемы cp2102.
Для отображения информации используется дисплей 16х2, также от Seeed Studio. Его особенность...
Prototyping using copper tape and PCB land pads
Trying more techiques than traditional proto/vero/strip board has made things much easier, especially with SMD parts. EDIT: now with sot23.
Harald "LaF0rge" Welte: Retronetworking / BBS-Revival setup at #36C3
After many years of being involved in various projects at the annual Chaos Communication Congress (starting from the audio/vidoe recording team at 15C3), I've finally also departed the GSM team, i.e. the people who operate (Osmocom based) cellular networks at CCC events.
The CCC Camp in August 2019 was slightly different: Instead of helping an Osmocom based 2G/3G network, I decided to put up a nextepc-based LTE network and make that use the 2G/3G HLR (osmo-hlr) via a newly-written DIAMETER-to-GSUP proxy. After lots of hacking on that proxy and fixing various bugs in nextepc (see my laforge/cccamp2019 branch here) this was working rather fine.
For 36C3 in December 2019 I...
Harald "LaF0rge" Welte: 36C3 Talks on SIM card technology / Mitel DECT
At 36C3 in December 2019 I had the pleasure of presenting: One full talk about SIM card technology from A to Z and another talk where I presented together with eventphone team members about Security issues in the Mitel SIP-DECT system.
The SIM card talk was surprisingly successful, both in terms of a full audience on-site, as well as in terms of the number of viewers of the recordings on media.ccc.de. SIM cards are a rather niche topic in the wider IT industry, and my talk was not covering any vulnerabilities or the like. Also, there was nothing novel in the talk: SIM cards have been...
Embedded & IoT Technology 2019, Йокогама, Япония. 20-22 ноября 2019
Довелось принять участие в мероприятии, попутно привез оттуда видеоотчет.
Retronetworking / BBS-Revival setup at #36C3
After many years of being involved in various projects at the annual Chaos Communication Congress (starting from the audio/vidoe recording team at 15C3), I've finally also departed the GSM team, i.e. the people who operate (Osmocom based) cellular networks at CCC events.
The CCC Camp in August 2019 was slightly different: Instead of helping an Osmocom based 2G/3G network, I decided to put up a nextepc-based LTE network and make that use the 2G/3G HLR (osmo-hlr) via a newly-written DIAMETER-to-GSUP proxy. After lots of hacking on that proxy and fixing various bugs in nextepc (see my laforge/cccamp2019 branch here) this was working rather fine.
For 36C3 in December 2019 I...
36C3 Talks on SIM card technology / Mitel DECT
At 36C3 in December 2019 I had the pleasure of presenting: One full talk about SIM card technology from A to Z and another talk where I presented together with eventphone team members about Security issues in the Mitel SIP-DECT system.
The SIM card talk was surprisingly successful, both in terms of a full audience on-site, as well as in terms of the number of viewers of the recordings on media.ccc.de. SIM cards are a rather niche topic in the wider IT industry, and my talk was not covering any vulnerabilities or the like. Also, there was nothing novel in the talk: SIM cards have been...