GPS data logger with RF capability

Archiver

Hello

I want to make a data logger that will store the GPS $GPRMC
coordinates (1 reading per second) for 10Hours. I then want to be
able to download the info to my notebook via a RF link and clear the
data stored on the GPS module so that it is ready for the next load
of Data.

I am thiking of the best way to implement the RF link between the PC
side and the data logger side. I am little concerned about code
balancing, as there may be long-ish strings of 0s and 1s being
transmitted.

Any ideas? I will be greatful for your help.

Best Regards

Ashfaq

Archiver

Thoughts:
1. Why RF? What range are you trying to achieve?
2. Why not IR LED? The Max 3100 and 3110 chips support the 232
based IR protocol of your laptop, if you can get within 10 feet.
3. Yes, there is at least one 'Run Length Limit' protocol which will
adjust the number of 0's to insure you have a transition every so
often -- but a 232 based protocol ALWAYS has a start-bit/stop-bit,
which does the same thing.
4. For storage: you'll have 36,000 samples to store. There are
several 'SPI' or '3-wire' interfaced 8-pin EEPROM modules that can be
utilized to store this much information. They tend to be 8,192 bytes
by 8 bits. The 'I2C' parts have more space, but I don't know if the
Stamp supports I2C. (See NutsAndVolts on Parallax website for I2C).





--- In basicstamps@yahoogroups.com, "ashfaqjuna" <ashfaqjuna@y...>
wrote:
> Hello
>
> I want to make a data logger that will store the GPS $GPRMC
> coordinates (1 reading per second) for 10Hours. I then want to be
> able to download the info to my notebook via a RF link and clear
the
> data stored on the GPS module so that it is ready for the next load
> of Data.
>
> I am thiking of the best way to implement the RF link between the
PC
> side and the data logger side. I am little concerned about code
> balancing, as there may be long-ish strings of 0s and 1s being
> transmitted.
>
> Any ideas? I will be greatful for your help.
>
> Best Regards
>
> Ashfaq

Archiver

Hello

Many thansk for your help.

The trouble is that I am trying to acheive a range of atleast 100
meters. So, I think that RF is probably the best.

Do you think I can get a way with just connecting an ISM band
tranciever on a comport of a PC and simply send and receive
information via a terminal like application?

Thanks again.

Best Regards

Ashfaq


--- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...>
wrote:
> Thoughts:
> 1. Why RF? What range are you trying to achieve?
> 2. Why not IR LED? The Max 3100 and 3110 chips support the 232
> based IR protocol of your laptop, if you can get within 10 feet.
> 3. Yes, there is at least one 'Run Length Limit' protocol which
will
> adjust the number of 0's to insure you have a transition every so
> often -- but a 232 based protocol ALWAYS has a start-bit/stop-bit,
> which does the same thing.
> 4. For storage: you'll have 36,000 samples to store. There are
> several 'SPI' or '3-wire' interfaced 8-pin EEPROM modules that can
be
> utilized to store this much information. They tend to be 8,192
bytes
> by 8 bits. The 'I2C' parts have more space, but I don't know if
the
> Stamp supports I2C. (See NutsAndVolts on Parallax website for I2C).
>
>
>
>
>
> --- In basicstamps@yahoogroups.com, "ashfaqjuna" <ashfaqjuna@y...>
> wrote:
> > Hello
> >
> > I want to make a data logger that will store the GPS $GPRMC
> > coordinates (1 reading per second) for 10Hours. I then want to be
> > able to download the info to my notebook via a RF link and clear
> the
> > data stored on the GPS module so that it is ready for the next
load
> > of Data.
> >
> > I am thiking of the best way to implement the RF link between the
> PC
> > side and the data logger side. I am little concerned about code
> > balancing, as there may be long-ish strings of 0s and 1s being
> > transmitted.
> >
> > Any ideas? I will be greatful for your help.
> >
> > Best Regards
> >
> > Ashfaq