GPS

While exploring the LMR website, I came across a couple of autonomous boat projects that looked really cool. They reminded me of another project that I've been watching for a while now called the Scout Transatlantic Project. If you haven't seen it, it's an 8 foot long carbon/kevlar boat, controlled by an arduino mega, and powered by solar panels and lipos. Enjoy.

Simon

hello guyz,

its been quite some time till i checked out LMR (due to major exams :P) and its got better then the past .

I ran into some confusion about my new project (and thought its best to ask here) since its first time i am using GPS , i checked

out several posts on LMR which helped me a  lot especially Gareth's post which was very informative for any gps starter guide.

I got the idea to make a wearable GPS logger wich logs the routes you walk.

This logged data will be uploaded to a server. A robot could now get a position to go, search the database on the server for any logged point in the area wich connects to a point wich is near the target area. Because a human beeing already walked there (and was outside and nothing was above him ;) ) there should be almost no obstacles..

Of course, the robots course will be logged, too but my intention is to create data from more than one source to control another source.

These are Pharos GPS-360s that came with MS Streets but they have been hacked for use with micro-controllers. They are breadboard ready and I will provide info on pinouts and even an Arduino sketch to read them. They are accurate, especially in motion, but tend to report they are jumping around in a small area (maybe 15' under an open sky) when at rest. It is still the "right" small area, but for my application I need ridiculous accuracy. Anyway, I have 3 of these to trade.

I can't take credit for this idea; a neighbor did a project for a local utility involving RF meter reading and he used 2 GPS units in the vehicle.

In my testing so far, GPS modules that are locked in do a much better job in motion than sitting still. If I ride a bike down the street with a GPS, it will capture my route almost perfectly until I stop and then it gets "fidgety" and will jump around. Some modules do a better job of staying nearly fixed, but  I haven't had any that were perfect. The location data is still reasonably valid, but the implied motion throws off the speed and course reporting drastically. I need to come up with an algorithm to know when to ignore it but I need to start using it as soon as it is valid.

I posted this as a comment on the cheap FTDI cable idea and it occurs to me that a lot of folks who might be interested will miss it there...

Another XMOS robot I have found, made by people at University of Denver.

Demonstration of XMOS real-time ability. This test is running 8 independent tasks: gps task, ultra-sonic task, compass task, wifi receive task, wifi transmit task, pwm output task, behavior task, status led task:

http://www.youtube.com/watch?v=KUYIEC_V984

Control of a ground vehicle via XMOS microprocessor and iPhone through wifi:

Well, I found out that Maplin had a really cheap GPS module that supports UART (Serial) at 38400 BPS. I'm still waiting for it, but here's what I have so far!

Here's the unit, and specs: (unit was JUST discontinued, so won't be able to find much info on the device itself)

Hi.

Soooo...

We have a Garmin 16 HVS datasheet

and a Picaxe 28x1