Hi guys ,
I've read the blue tooth connectivity thread,
im new to Gps sailing and have the evil gw60 watch that never connects !????

So are you guys telling me there is no device out there that has Bluetooth and gps, 5 hz plus and has error correction that is legal for logging on website?!

thinking that simple motion logger now is only option and keep gw60 as the display .

Thanks guys

I feel like I need to clear up some possible misconceptions about the use of the terms 'Bluetooth GPS' and 'GPS Loggers'.

They are two very different things and a device does not nessasarily do both.

I know the OP was looking for a BT GPS to use with GPS-Logit for posting to the GPSTC.

Unfortunately, as far as I can find, there are no currently made commercially available GPS BT devices that are suitable for the GPSTC.

There used to be at least one, but it was discontinued by the manufacturer around 10 years ago:

Wintec G-Rays 1:

This device is not a Logger! It does not have any way to record the data, only to send it to another BT enabled device like GPS-Logit Android Phone App. It used the Ublox 6 chipset and can be set up to output Doppler Error data (UBX sentences) and can be approved for GPSTC posting.

Here are examples of custom home made devices that do exactly the same thing but are based on the later M8 multi GNSS ublox chipset that
can do Muliti GNSS data up to 10Hz and GPS only data up to 18Hz (The same chipset the Motion uses).

Made by Manfred Fuchs:


For Scale (the G-Rays 1 was even smaller):



Made by Mathew Robertson:








If anyone knows a good electronics fabricator or hobbyist, these devices are not that hard to make. There is essentially 3 components. The M8 GNSS module, the BT Module and a battery with some sort of charging connection - oh, and a switch for on and off.

To make something into a Logger, one has to add a few other things that make it a bit more complicated. Decrepit and Boardsurf can fill you in on that, but here is a pic of a very neat and compact Twin GPS, 10 Hz logger that Manfred made and I tested for him against the timing gates at Luderitz in 2013. This one was based on two Ublox 6 modules and each had a seperate SD card to record the data.

For what it's worth, Wintec do still make a small, low cost GPS/GNSS device that contains a unblox Chipset and in theory it could record the data the GPS-TC needs. However, it looks like it can currently only be configured to produce NMEA data output for Recording internally, or for BT transmission.




Of course, I got all excted when I read the blurb on their website and read the specifications.





And then right next to that there is this:




So I reasoned that it would probably be possible for them to add a few lines of code to their firmware so that the device could be configured (as their earlier G-Rays 1 could be) to produce UBX data, and therefore the data the GPSTC needs. I assumed, perhaps naively, that this would be a pretty simple task for them and not too expensive or time consuming.

So I wrote to them and asked if they could add the functionallty to their firmware, assuring them that there is a market for such a slightly modified device among windsurfers worldwide.

I was extremely disappointed to get this response from the sales guy:

Hi Andrew,

Sorry for that. We don't have time to do this. There are many other project doing now. Please kindly understanding. TKS

BR

WTF!??? What is all the blurb on their website about anyhow. Is it just BS??

www.win-tec.com.tw/portfolio-item/wbt202/

sailquik said..
For what it's worth, Wintec do still make a small, low cost GPS/GNSS device that contains a unblox Chipset and in theory it could record the data the GPS-TC needs. However, it looks like it can currently only be configured to produce NMEA data output for Recording internally, or for BT transmission.




Of course, I got all excted when I read the blurb on their website and read the specifications.





And then right next to that there is this:




So I reasoned that it would probably be possible for them to add a few lines of code to their firmware so that the device could be configured (as their earlier G-Rays 1 could be) to produce UBX data, and therefore the data the GPSTC needs. I assumed, perhaps naively, that this would be a pretty simple task for them and not too expensive or time consuming.

So I wrote to them and asked if they could add the functionallty to their firmware, assuring them that there is a market for such a slightly modified device among windsurfers worldwide.

I was extremely disappointed to get this response from the sales guy:

Hi Andrew,

Sorry for that. We don't have time to do this. There are many other project doing now. Please kindly understanding. TKS

BR

WTF!??? What is all the blurb on their website about anyhow. Is it just BS??

www.win-tec.com.tw/portfolio-item/wbt202/

sailquik said..
For what it's worth, Wintec do still make a small, low cost GPS/GNSS device that contains a unblox Chipset and in theory it could record the data the GPS-TC needs. However, it looks like it can currently only be configured to produce NMEA data output for Recording internally, or for BT transmission.




Of course, I got all excted when I read the blurb on their website and read the specifications.





And then right next to that there is this:




So I reasoned that it would probably be possible for them to add a few lines of code to their firmware so that the device could be configured (as their earlier G-Rays 1 could be) to produce UBX data, and therefore the data the GPSTC needs. I assumed, perhaps naively, that this would be a pretty simple task for them and not too expensive or time consuming.

So I wrote to them and asked if they could add the functionallty to their firmware, assuring them that there is a market for such a slightly modified device among windsurfers worldwide.

I was extremely disappointed to get this response from the sales guy:

Hi Andrew,

Sorry for that. We don't have time to do this. There are many other project doing now. Please kindly understanding. TKS

BR

WTF!??? What is all the blurb on their website about anyhow. Is it just BS??

www.win-tec.com.tw/portfolio-item/wbt202/

Pity, sounds like a nice unit. May be worth trying again in 6 mths time. They might be less busy, or you might get a more motivated salesman?

I will try again with Wintec. I will try to get contact with someone who is not the sales guy.

Duke4, the GW-60 contacts have always been a bit of an issue. Mine is at least 3 years old and I often have to clean them or wiggle the connector around a bit, but eventually it always works.

As an aside, Wintec obviously did a reasonable job of the G-Rays. I hadn't touched it for quite a few years, but when I charged it up and tuned it on, it got a good fix and connected to GPS-Logit straight away. And I had never tried it @ 5Hz before, only at 10Hz.

Just saw this post, didn't realise it was back in 2007 I used the G-Rays to get 10hz doppler data for the first time...where did all those years go.

Been playing with the latest batch of android phones, since Android 7 came out it has been possible to log the raw gps data from the phone. With the latest Android 10 I have it records the doppler speed accuracy S.ACC and also the Pseudorange doppler speed accuracy for each sat (up to 35 sats available using all the constellations). No need for a bluetooth device as it uses the phones internal gps chipset. I've run it at 10hz but 1hz should be more than adequate. If I get time I'll see if I can parse the data to use. This is the app to use to test your phones capabilities. play.google.com/store/apps/details?id=com.android.gpstest&hl=en_US

To quote Master's advice to Caine in that 70s TV show...."Patience Grasshopper. "

Load the app and try it. If it shows the S.Acc number then it works. The Android 10 I just got is the Umidigi A3S ($60 from China www.aliexpress.com/item/4000388219112.html?af=3468411&cv=37197824&cn=45q7vp8mk8dae4qpij4xzvfokrg2h16s&dp=v5_45q7vp8mk8dae4qpij4xzvfokrg2h16s&utm_source=epn&utm_medium=cpa&utm_campaign=3468411&utm_content=37197824&afref=&aff_platform=api&sk=nroPUHtq&aff_trace_key=fe95da74412341909cb622c36edaea8c-1585356934993-03419-nroPUHtq&terminal_id=46ba952c925b4a88b4ed50ad5ba3bb74&aff_request_id=fe95da74412341909cb622c36edaea8c-1585356934993-03419-nroPUHtq ), it shows the speed accuracy.

Just been recording some files to see what sentences have the data in the log files.

Have identified the data stream that contains the sentence with the error data output. This is with a cheap Android 10 phone, Umidigi A3S.

Here's an example: Location I onLocationChanged: Location[gps 45.659440,-121.349485 hAcc=2 et=+1d23h6m2s278ms alt=353.3 vel=0.0 bear=6.19 vAcc=27 sAcc=1 bAcc=180 {Bundle[mParcelledData.dataSize=96]}]

Will see if Manfred can incorporate it into GPSLogit to record in the .sbp files it outputs.