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i-Blue GM-2 USB GPS receiver
bobniets
In the specs for this new i-Blue GM-2 it lists DGPS RTCM capability. Has anyone got a unit yet? Find it hard to believe at that price point.

Photo of the unit
t1d
Do you have a link?
Marvin Hlavac
I exchanged a few emails regarding the new i-Blue GM-2 with Carlon of Semsons today. They are sold out. But they are expecting their 2nd shipment soon:

Quote:
Probably in about a week to week and half. ETA about end of next week.
The interesting features of this MTK2 chip based i-Blue GM-2 USB GPS receiver include -165dBm tracking sensitivity, which compares favorably with the -159dBm of units based on SiRFstarIII chips.

GM-2 refreshes at the rate of 5Hz (as opposed to the typical 1Hz). It is possible to switch to 1Hz via software.

GM-2 is waterproof, and it does have a magnetic base for easy mounting of the car's roof, if needed, but the receiver should work just fine on the dashboard, too.

When the unit becomes available, we will have a closer look at it.
tcassidy
Unfortunately for the i-Blue and typical of the MKT2 chip is a 115,200 bps data rate. This will not work directly with S&T 2010 or Mobile PC.

Terry
tcassidy
Hmm, the specs at the site seem to indicate it can be set to 4800 bps but I can't see any way shown to change it. The default is 9600 bps apparently.

Terry
bobniets
I downloaded the manual and gpsview software . It appears the baud rate can be set to 4800. There is also a setting menu for dgps , but need the unit activated to see options.
NMEA0183 v3.1 baud rate 4800/9600/…/57600,
Default: 9600
bob
tcassidy
The manual shows a setting for NMEA but it is not clear to me how you might change it from the default 9600 bps to something else.

Terry
Attached Images
nmea-settings.jpg  
Marvin Hlavac
To convert the baud rate we may need to use GpsGate, unless there really is a way to do it via the utility software, which I suspect may not be possible.
bobniets
The control software has a baud setting , but I guess that's no guarantee the unit will respond. I should have a unit by monday and will test. bob
Attached Images
gpsview.jpg  
tcassidy
Quote:
Originally Posted by bobniets
The control software has a baud setting , but I guess that's no guarantee the unit will respond. I should have a unit by monday and will test. bob
That is the input for GPSView and has to be set to 9600 as the default of this GPS device. If you try any other setting, you will not be able to talk to the GM-2.

Terry
tcassidy
Quote:
Originally Posted by Marvin Hlavac
To convert the baud rate we may need to use GpsGate, unless there really is a way to do it via the utility software, which I suspect may not be possible.
There must be a way as 9600 bps will not support 5Hz. Note that it says over 49% usage for 1 Hz at the default 9600 rate. Hopefully Bob will have some better news when he gets one.

Terry
bobniets
This unit was recommened by a knowledgeable tech support guy as meeting my need for DGPS RTCM. That listed spec is for the chipset and not the unit and shouldn't be included in the DGPS capabilities. As they say if it looks to good to be true it probably isn't true.
bobniets
The baud rate is factory set at 9600 and not changable. Any reference to other baud rates refer to the chipset capability.
tcassidy
The MKT2 GPS chipset is 115,200 bps. The other speeds would have to be determined by auxilliary chips and firmware on the device. No reason those couldn't be changed and at least one good reason why they should. The question is how. They do it for Bluetooth.

Terry
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