Raspberry Pi Forums

fuffkin

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait Try changing console=tty1 to console=serial0. There's a good article that describes exactly your problem and how to fix it here! : http://spellfoundry.com/2016/05/29/configuring-gpio-ser...

fuffkin

As a start, have you tried pinging the Raspberry Pi at that IP address from the PC, to make sure it is actually up and on the network (and reachable)?

fuffkin

See what David Hunt did here : http://davidhunt.ie/wp-content/uploads/ ... hutter.png Yes, that simple transistor in the link is all you need: one for shutter release and one for focus. The transistor emulates the contact closure and the open collector means you don't really have to worry about the...

fuffkin

Hi Marantha, Which PIR Sensor are you using? Is it similar to these https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor?view=all from adafruit? If it is, you need to power from the 5V output and yes you will need to do the SleepyPi.enableExtPower(true) to power the sensor. You mi...

fuffkin

The other thing to look at is SimpleCV which is a Python framework. You can do things like this with remarkably little code and with a Pi 2, I would think reasonable performance.

fuffkin

I've worked in Machine Vision for many years, and these guys are the go-to suppliers in Europe for Industrial Cameras:

http://www.stemmer-imaging.co.uk

They might have something / recommend something for you.

fuffkin

Easy Answer :

http://www.ebay.co.uk/itm/P4PM-Digital- ... 2ed7aa653f

Oooh, That's neat.

fuffkin

Alex over at Rapi.tv does a good summary http://raspi.tv/2015/raspberry-pi2-powe ... easurement under various conditions.

Idling around 230mA up to 420mA hammering all the cores.

fuffkin

850nm should be pretty good. How are you powering the illuminator? If it's not getting full juice, then you will get decreased range.

fuffkin

....and the A+ comes in at number 10!

http://uk.rs-online.com/web/generalDisp ... topsellers

considering how big RS are and serve mainly commercial customers, this is very impressive.

fuffkin

The application code that is running on the Sleepy Pi in this instance, is actually talking at 9600 baud to the RPi and would come up as garbage at 115200 baud. We're hoping this could be the route cause and we're working through it.... As an aside, I'm puzzled by the SIM900 and it's voltage levels....

fuffkin

This is technically feasible to do with Image Processing per se (maybe using tools like OpenCV) where the Referee is effectively your target and you use a tracking algorithm to lock on to him. However, I think you'll find the computational power of the RPI is not up to the task - certainly not with ...

fuffkin

so i was wondering whether the 'Anker Astro Mini 3000mAh Power Bank External Battery Charger' is compatible with pi, I've used those puppies with the Pi and they work fine (and they are soooo cute). To date no problems with charging. My kids also use them with their mobile phones, so they've surviv...

fuffkin

Hi Bob, 1. I have already programmed my raspberry pi and the components are on a bread board that is attached via a GPIO. If I removed the GPIO and put the Sleepy Pi onto the GPIO headers of the pi and then put this GPIO onto the headers of the Sleepy pi, would it still work or would I have to repro...

fuffkin

Trying to walk that fine line between offering a possible solution and not wish

...wishing to spam the thread.

Apologise for the double post (need to get a bigger phone!)

fuffkin

Trying to walk that fine line between offering a possible solution and not wish

fuffkin

These guys did something very similar with a solar powered bird feeder & tweeter. Because the battery would run down overnight, they turned off the Raspberry Pi overnight and back on in the morning - effectively sleeping during the night http://wearemanifold.com/feeder-tweeter-2-0-do-the-evoluti...

fuffkin

I don't know how small the quantities you need are, but with Farnell it is free next day delivery over £20 (ex vat).

fuffkin

Marko,

Those boot times are incredible! What is the functionality of these minimal loads once booted? Have you done any tests to measure the time to take an image from the camera?

Jon

fuffkin

OCR needs high resolution pictures

As a sweeping statement not true. Depends what you are looking at, distance, font size, lighting etc. Effective OCR has been around for decades, long before the advent of 5MP cameras. I used to do effective OCR with old analogue cameras 768 x 578 pixels.

fuffkin

need to use at least a 12mp cmos sensor with RPi

Why? what's the project and can you do whatever with less resolution?

fuffkin

You can use either. As a general rule (all other things being equal) the 880nm will appear to be slightly brighter as the sensor is more sensitive to it. If you want to be more covert use 950nm as these will not be seen with the naked eye. With 880nm at high power you can just make out a cherry red ...

fuffkin

You could try one of the range of USB phone chargers, which are small and pack a reasonable punch. e.g. Anker Astro Mini http://www.amazon.co.uk/Ultra-Compact-Lipstick-Sized-Technology-Smartphones-Adapters-/dp/B005QI1A8C/ref=sr_1_1?ie=UTF8&qid=1407358134&sr=8-1&keywords=anker+charger whi...

fuffkin

I've been asked many times about this by potential clients during my time working in the Machine Vision Industry. To my knowledge no one has yet succeeded to get a reliable system working with Image processing doing this. One thing you can be sure of is that to get this working in a real world scena...

fuffkin

Rather than go down the GPU route, can you optimise your algorithm / processing / lighting?

This can often lead to significant increases in FPS by tweaking the way you approach the problem.

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