On Thu, Nov 15, 2012 at 4:30 AM, David J Taylor <david-tay...@blueyonder.co.uk> wrote: > i just used this to with a raspberry pi with good success. > > https://www.adafruit.com/products/746 > > james > =============================================== > > It looks idea, James, but ... with the 15 mm square patch antenna it seems > deaf compared to similar devices with 25 mm antennas. Perhaps > understandable, but I just bought one and it's been sitting for well over an > hour and not yet acquired lock. The device I bought from China, sitting > next to it, has been happily locked for that whole period. (As I'm running > a test I don't want to unlock the other device). Just a caveat for someone > considering using these devices indoors - size matters! > > 25 mm antenna device: > http://www.satsignal.eu/ntp/NEO-6M-under-initial-test.jpg > http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html > > Cheers, > David > -- > SatSignal Software - Quality software written to your requirements > Web: http://www.satsignal.eu > Email: david-tay...@blueyonder.co.uk >
all good points David. I originally had place mine close to a window to get a lock as it could not acquire any satellites in my home office otherwise. I don't have a south facing window and my office is on the first floor of a two story house. That may or may not have played a part but just placing it near the window and facing outside worked fine. I added the antenna (https://www.adafruit.com/products/960) and the connector (https://www.adafruit.com/products/851) and now I don't have to keep my RPi and gps near the window. What I liked about this one was it would interface with the RPi GPIO pins without having to use a converter from RS232 to 3.3v and I never considered a USB gps due to the inherent issues with USB and timing. Thanks, James _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.