Re: [DIYbio] Web-ready Refrideubator

LOL

On Mon, Mar 31, 2014 at 12:21 PM, Cathal Garvey
<cathalgarvey@cathalgarvey.me> wrote:
> Anyway, that's all nonsense. Python *does* support brackets and
> semicolons if you want to use them:
>
> def something(arg1, arg2): #{
> arg1 += arg2 #;
> return arg1 #;
> # }
>
> On 31/03/14 19:57, Avery louie wrote:
>> I do c and python. I'm tabbing and bracketing and semicoloning and always
>> in the wrong spot :p
>>
>> --A
>> On Mar 31, 2014 2:41 PM, "Josiah Zayner" <josiah.zayner@gmail.com> wrote:
>>
>>> Well, C is overkill and python doesn't use brackets.
>>> And I have been programming in Perl for dare I say > 10 years? Considering
>>> that, I should be much better at Perl than I am.
>>>
>>>
>>>
>>>
>>> On Mon, Mar 31, 2014 at 11:28 AM, Nathan McCorkle <nmz787@gmail.com>wrote:
>>>
>>>> Why perl?
>>>> On Mar 31, 2014 11:19 AM, "Josiah Zayner" <josiah.zayner@gmail.com>
>>>> wrote:
>>>>
>>>>> I have been working on a bunch of code that allows one to plug in a
>>>>> couple Arduinos to a Linux computer running a webserver using Perl. One
>>>>> can communicate with the arduino through a webpage and see the output of
>>>>> the Arudino. So I can say change the temperature on an incubator or control
>>>>> a PCR machine. I saw this thread so I just made a blog post about it:
>>>>> http://doitourselfscience.blogspot.com/2014/03/sending-and-receiving-data-from-arduino.html
>>>>>
>>>>> The code is a little complicated but it all works great. I have the
>>>>> incubator code up on the blog as that is all I have accomplished so far. It
>>>>> controls a fan and some heating element through MOSFETs, which I find are
>>>>> easiest.
>>>>>
>>>>> Anyways, if you have questions or want to hack it to do something else
>>>>> let me know and I can probably help.
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Josiah Zayner
>>>>> http://DoItOurselfScience.blogspot.com
>>>>>
>>>>>
>>>>> On Monday, March 31, 2014 10:22:18 AM UTC-7, Avery wrote:
>>>>>>
>>>>>> I could do it on another machine, or on a PaaS, but right now the
>>>>>> important thing for me is to try it out- what is it like to just let your
>>>>>> cells chill in the lab?
>>>>>>
>>>>>> The other question is in integration of other devices. There is really
>>>>>> no reason to have something like this for regular pcr (maybe for qpcr)
>>>>>> since PCR machines already tell you when they will be done, and store
>>>>>> products at 4c (normally) once they are done. Electrophoresis on the other
>>>>>> hand would be perfect for something like this. Set it up, go get coffee,
>>>>>> watch tv...check you gel. So now the question is how I want to set up the
>>>>>> rest of the tools so I can re-use code to make more machines.
>>>>>>
>>>>>> Basically I need to map computers/device architecture to how they
>>>>>> should be available. I also need to decide if I am building the system to
>>>>>> be portable (in the code sense of transferring the build info) to other
>>>>>> peoples labs.
>>>>>>
>>>>>> --A
>>>>>>
>>>>>>
>>>>>> On Mon, Mar 31, 2014 at 1:13 PM, Cathal Garvey (Phone) <
>>>>>> cathal...@cathalgarvey.me> wrote:
>>>>>>
>>>>>>> Easier I feel to use XMLHttp.Server to host an XML-HTTP API server and
>>>>>>> use the corresponding Client module to pull and process data on another
>>>>>>> machine? Consider installing a secure XML monkeypatch though.
>>>>>>>
>>>>>>>
>>>>>>> On 31 March 2014 17:51:01 GMT+01:00, Nathan McCorkle <nmz...@gmail.com>
>>>>>>> wrote:
>>>>>>>>
>>>>>>>> those requests would be quite small though, so as long as the pi
>>>>>>>> doesn't throw them out, rather queues them, it might take a second or
>>>>>>>> three long but it should be fine... the returned data is just a few
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> bytes of text, and the packet overhead should be 20 bytes (according
>>>>>>>> to a quick google for ipv4). Someone else should probably comment on
>>>>>>>> the best server for the pi, but basically it should have a decent
>>>>>>>> timeout set and the ability to queue requests. I'd give flask a quick
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> try:
>>>>>>>> http://mattrichardson.com/Raspberry-Pi-Flask/
>>>>>>>>
>>>>>>>> If the pi was trying to do the temp control PID loop, well you're
>>>>>>>> already in bad paradigm unless you have a RTOS/realtime kernel
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> running, but if you do just make sure the priority (nice, renice) of
>>>>>>>> the control process is lower (higher priority) than the server... and
>>>>>>>> no harm should be done. Worst case if the server
>>>>>>>> does crap out for a
>>>>>>>> user, it just keeps trying until it gets the good response. I doubt
>>>>>>>> any small-time lab has to worry about this, and maybe even a medium
>>>>>>>> sized one would be fine too without another server (but likely those
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> companies/organization would have another better server, so it would
>>>>>>>> be easy to scale then).
>>>>>>>>
>>>>>>>> On Mon, Mar 31, 2014 at 9:32 AM, Tom Hodder <t...@limepepper.co.uk> wrote:
>>>>>>>>
>>>>>>>>> On 31 March 2014 16:58, Nathan McCorkle <nmz...@gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> What about dynDNS for getting past the IP issue?
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I think that solutions that put the pi on the internet as a web server are
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> just kicking down the road, the can containing the issue of scaling.
>>>>>>>>>
>>>>>>>>> Which is basically that for these nice graphs, to get real time updates,
>>>>>>>>> your going to be running a bunch of XMLHTTPRequest() to pull data into a
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> AJAX/jQuery or other nice visualization running in the browser. And these
>>>>>>>>> are all going to be served by the pi. If you have 10 users watching some
>>>>>>>>> experiment in progress, and then they would all be polling the pi
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> continuously. Eventually this is going to compromise the pi's ability as a
>>>>>>>>> controller/sensor.
>>>>>>>>>
>>>>>>>>> For scaling, it would be better just to have the pi batch a bunch of data,
>>>>>>>>> say every 10 seconds, and post it to a dedicated server, with decent
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> resources, which can scale to dishing out lots of updates to web browsers.
>>>>>>>>> Load might bring down the web server, say an AWS virtual, or
>>>>>>>>> https://www.pythonanywhere.com/, but the Pi would go on oblivious.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> (and you would definitely not lose ssh access to the pi,
>>>>>>>>> during a critical
>>>>>>>>> experiment etc, the important thing that would result in you having to get
>>>>>>>>> out of bed ;-)
>>>>>>>>>
>>>>>>>>> Cheers,
>>>>>>>>> Tom
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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>>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>>
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>>>>>>
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>>>
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>>
>
> --
> T: @onetruecathal, @IndieBBDNA
> P: +353876363185
> W: http://indiebiotech.com



--
-Nathan

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