Raspberry Pi Forums

slmaws

Sorry for a late replay. I'm a little sick. Twisted is a big python framework created to asynchronously serve dynamic content. You can use it to build HTTP server, IRC bot or to create web app which for example uses websockets. It's designed to serve hundreds of thousand requests simultaneously. Usi...

slmaws

You can try to use twisted. Install it via:

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sudo apt-get install python-twisted

or via

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sudo pip install twisted

and run via:

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twistd -n web -p 8000 --path .

You can change port and path to the dir. It's much more than 200 lines. You can not write stable and reliable HTTP Server in 200 lines of code

slmaws

SimpleHTTPServer is designed to serve static files, nothing more. The question is why do you need pure python HTTP server and how do you want to use it? I don't know any production ready python HTTP servers, actually I don't know any Python HTTP server. In python world to serve dynamic content WSGI ...

slmaws

Does it change to output mode? You can check it with

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gpio readall

slmaws

No tutorials yet

But I have some code: https://github.com/lukaszo/picar_worhshop It's just proof of concept and a lot of work is required but it works.

It doesn't work on Pi2. I will be rewriting it to use pigpio soon.

slmaws

All methods mentioned by you will work. Personally I used python on Pi, Javascript and websockets for communication.

slmaws

Looks very interesting. Can you post bigger images? I can't see too much

slmaws

Don't use time.sleep as some of the guys suggest, you may miss some clicks. Use wait_for_edge function: #!/usr/bin/env python import RPi.GPIO as GPIO from PIL import Image im=Image.open("/home/pi/Rock.png").convert("RGB") buttonPin = 25 GPIO.setmode(GPIO.BCM) GPIO.setup(buttonPin,GPIO.IN) while True...

slmaws

You shouldn't have any errors. Did you run sudo apt-get update first? Please past the errors from you command.

slmaws

I made some Python implementation tests (for CPython and PyPy) and it looks like, by just switching to Pi2 your Python code on ONE core can be from 2x to 3.5x faster. And you still have 3 more cores to use :) Here is a link to my benchmarks http://rpitips.com/python-and-pypy-on-raspberry-pi-1-nad-2-...

slmaws

DougieLawson wrote:The interactive option: http://pi.gadgetoid.com/pinout which is what I use all the time.

I'll usually use BOARD numbers as they're countable when I'm staring at my RPis.

It's a discovery of the week for me

Very useful site

slmaws

Don't think this is correct... In the topic you link to the user used different numbering schemes for wiringpi and python. Here the OP uses the same schemes: 'gpio -g' and 'GPIO.setmode(GPIO.BCM)' both refer to BCM numbering scheme. Yeah, you are right. I didn't notice that he uses the same scheme....

slmaws

See this thread: http://www.raspberrypi.org/forums/viewt ... 8&t=101464

You have two solutions. Choose ONE:
- In RPi.GPIO change pin to 11
- instead of 'BCM', use 'BOARD':

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GPIO.setmode(GPIO.BOARD)

slmaws

If you have facebook see my video here https://www.facebook.com/groups/malinow ... 127629977/

FPS 40-100
40 during a shooting

slmaws

@letmecraft I assumed that you know the current and you asked for viable options. You actually should measure it first.

slmaws

Gertboard is overkill for such a project. L293D is good enough for your motor. Motor is also good enough to do your task. You can control speed with PWM.

slmaws

What kind of chip is it? What protocol does it use?

slmaws

So you want from RPi remotly send signals to servos? You still need something to control the servos. It may be another RPi or Arduino or just simple Atmega processor. Then you can choose various protocols for communication like Infra Red, Bluetooth, wi-fi or radio waves.

slmaws

I used this tutorial http://www.raspberrypi.org/forums/viewt ... 78&t=18853 on new Pi 2 weeks ago and it worked very well.

slmaws

It's really amazing project. Can you post a link to the relay timer which are you using?

slmaws

Heater wrote: Drive 96 USB ports. Or collect images from 24 cameras. Or drive a 24 screen video wall. Or heck, provide 24 UARTs.

You don't need to create "cluster" to do it. Actually I also have plans to build cluster but just for fun

slmaws

There is one problem here. If there is a security problem usually you need to restart some services. Like with "shellshock" you need to restart all ssh sessions and with "heartbleed" you need to at least restart apache/nginx.

slmaws

Moderator, I followed the URL at point 3. But could not find any reference to the Order Code or CPU register definitions. Is that because I should be looking on the ARM Web Site for documentation relating to the CPU that is used by the Raspberry Pi product? ...and if so, is there any particular inf...

slmaws

A cluster of Pi's does not give you a big powerful computer, it gives you a network of small computers, and its up to you to give each of them a workload. It was true for old Pi, on Pi2 you have 4 cores and each core is about 3x faster than old CPU. 24 new Raspberry Pis still will be slower than my...

slmaws

AndyD wrote:Thanks for the tip. I wonder if there is a parallel implementation of bzip2.

Sure it is http://compression.ca/pbzip2/ It uses 100% of all cores during compression and decompression. On RPi2 compression is 3 times faster than standard bzip and decompression almost 4 times faster.

Search found 32 matches

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