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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 20 Aug 2018
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      I tried to use an Arduino implementation. Hours of digging through the source code later because half this stuff is undocumented I'm giving up, because the design choices are fundamentally stupid and broken. Why did I even try? Seriously. Sigh.

      3 replies 1 retweet 23 likes
      Show this thread
    2. Hector Martin‏ @marcan42 20 Aug 2018
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      If you're wondering: ESP8266 variant. Can't make the main thread go to sleep and wake it up on wifi events. You get to poll. Which doesn't work when you want power saving. Which I kind of do because I'm building a temperature sensor and 70mA constantly will warm it up.

      5 replies 1 retweet 10 likes
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    3. Hector Martin‏ @marcan42 20 Aug 2018
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      It's really sad, because I implemented my entire application in 200 lines of code using all these wonderful pre-existing libraries, and now I have to rewrite it (which will probably be 2000 lines) because I hit a fundamental showstopper with power management.

      4 replies 0 retweets 7 likes
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    4. Giovanni‏ @Der0ad 20 Aug 2018
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      Replying to @marcan42

      You can't do power saving on an esp in the way you want to. You should use 2 separate cores, the esp and an avr or similar that brings up the esp

      1 reply 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 20 Aug 2018
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      Replying to @Der0ad

      Yes I can. There's even a whole document from Espressif about that. https://www.espressif.com/sites/default/files/9b-esp8266-low_power_solutions_en_0.pdf …

      1 reply 0 retweets 0 likes
    6. Giovanni‏ @Der0ad 20 Aug 2018
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      Replying to @marcan42

      Well, yes but it will eat a lot of current, that's why I said it wasn't optimal to use it. The best way I think is via btle transmitters. I know they aren't like the WiFi, but they do not eat current like the esp

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 20 Aug 2018
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      Replying to @Der0ad

      1mA isn't "a lot of current". I don't need this to run on batteries, I just need it to not warm up 10°C above ambient.

      10:07 PM - 20 Aug 2018
      1 reply 0 retweets 0 likes
        1. Giovanni‏ @Der0ad 21 Aug 2018
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          Replying to @marcan42

          Oh, then nvm. XD

          0 replies 0 retweets 0 likes
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