Dawn Robotics Forum Support and community forums for Dawn Robotics Ltd 2014-04-04T22:50:41+01:00 http://forum.dawnrobotics.co.uk/feed.php?f=5&t=1236 2014-04-04T22:50:41+01:00 2014-04-04T22:50:41+01:00 http://forum.dawnrobotics.co.uk/viewtopic.php?t=1236&p=1287#p1287 <![CDATA[Re: Wi-Fi Not Found; SD Image Questions...]]>
First of all, thank you for buying a robot, and welcome to the forum. :)

If the Pi doesn't boot then it definitely sounds like a problem with the SD card. How exactly are you flashing the image to the SD card? Inside the large .zip file should be a .img file and that is what is flashed to the SD card. You can't copy the .img file as you would a normal file however, it's a bit different from the NOOBS setup. You can find instructions for flashing an SD card for a number of different platforms here.

Once you've got your Pi booting we can look at any other problems you might be having - one thing at a time. ;) Although having said that, with regards to the Arduio Mini Driver board, the blue LED should only flash a few times on power up and whenever the reset button is pressed. If it's flashing lots then it could suggest that it's being reset for some reason, which might be low power but I'm not sure. How much does it flash if you just plug it into your normal PC using the USB cable?

Anyway, let me know how you get on.

Regards

Alan

Statistics: Posted by Alan — Fri Apr 04, 2014 10:50 pm

]]> 2014-04-04T17:44:15+01:00 2014-04-04T17:44:15+01:00 http://forum.dawnrobotics.co.uk/viewtopic.php?t=1236&p=1286#p1286 <![CDATA[Wi-Fi Not Found; SD Image Questions...]]>
On switching the Arduino to the "On" position, everything seems to power up nicely, and I get a quick "I'm alive" response from the pan/tilt. A blue LED on the driver begins blinking and doesn't stop.

From there, I can't find the wi-fi access point ('Pi_Mini_Robot'). I initially suspected the wi-fi adapter (I didn't get the Edimax that you sell), and swapped it with another that is similarly micro in size as the Edimax, which I presumed would have a comparably small power draw. That didn't work either. (Note - I have the Edimax model your site prescribes on order now).

Then I started suspecting the SD card (not purchased from Dawn Robotics, but successfully ran Raspbian on this same Pi unit in prior experiments), or the files therein. Disconnecting the Pi from the Arduino, I wanted to see if I could get the image to boot with AC power (wall outlet), and hooking up via a HDMI. Nothing seems to boot. I then formatted the card, and reflashed it with the original Raspbian from the official Pi site, and got a successful boot.

I guess I'm landing on the image on the SD card. So, a few questions:

- should the blue light on the Arduino continue to blink indefinitely? Or is something perhaps getting hung up in downloading the sketch?
- there are two files in the Index; one is the huge zip file, the other is a tiny "sha1sum" file. Must both get copied to the card? (I think I tried this, but have been through so many iterations, I've lost track).

There's any number of things I could be doing wrong here, so troubleshoot away! :) Thanks a lot!

John

Statistics: Posted by johnny555 — Fri Apr 04, 2014 5:44 pm

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