Re: [gpsd-dev] PPS over USB

[Ed W]

Hi

> > Incidentally I have a load of these (very inexpensive):
> >
> > http://www.bluenext.co.uk/bluetooth-products/gps/92-bn-903s-gps-dongle.html
> >
> > They are detected as a "cp210x: v0.09:Silicon Labs CP210x RS232
> > serial adaptor driver".  Some googling suggests this is a USB2
> > chipset?
> Sadly, as esr has found out, the cp210x linux driver is very poor and
> gets no love from the vendor.  It does not support basic ioctl() calls
> that gpsd needs to utilize the PPS signal.  So until there is a good
> driver for them they are not an option for gpsd users.

Quick heads up, but assuming a the device above does not have PPS 
signals wired, what additional ioctl calls would benefit accuracy with 
gpsd?  (and why?) I would be interested to investigate adding kernel support

Thanks

Ed W