, you may want to do it yourself, either because you want to update the firmware or change some settings, or because you've bought the module
because we were out of stock and you need to set it up to use with ArduPilot.
if you don't already have it.
to connect this directly to your PC, or make your own.
If you're going make your own, solder a four pin header on the pins below the GPS connector on the adapter, as shown above. Now connect it to your FTDI cable
, with the pin mappings shown above. I use jumper cables
and a six-pin breakaway header
for this, as shown below, but you can use any method you want, including making a custom cable, which is the neatest method if you plan to do this more than once:Jumper wires connected to six-pin header:
Header plugged into FTDI cable:
Once you've made the physical connections, download and install the U-center software
from uBlox. (It doesn't work on Windows 7, so if that's what you're using, open a virtual Windows XP mode window to run the software in. You'll also need to "attach" the FTDI USB serial ports, which you should be pretty familiar with if you use virtual XP mode)
Now run the U-center software, selecting the Com port that your FTDI cable is attached to. You also need to tell it what baud rate the GPS module is running at. If you got it from the DIY Drones store, it's 38,400. If you got it from Sparkfun, it's probably 9,600:
You can tell if it's working by going to View/Binary Console. You should see the data flowing through. Also, the icons circled below should be green or flashing green (it's not showing a sat lock because I'm indoors):
If it's not working, check these things:
1) Did you wire it up right?
2) Did you select the right Com port?
3) Did you select the right baud speed?
If you want to update the firmware, you can get the latest uBlox firmware here
. Use the one for the "LEA-5H" modules.
To flash the new firmware go to Tools/Firmware update. Make sure the firmware image points to the file you downloaded and unzipped.
To configure a module to use with ArduPilot, download this file
Go to Tools/GPS configuration, and select the file you just downloaded. Check the "Store configuration..." box and click on "File >>> GPS".
If you were communicating with the module at any speed other
than 38,400, you'll find that the configuration process will fail midway through. That's because it's just gotten to the bit that changes the communications speed to 38,400. Set your u-center com speed to 38,400 and run it again. It should work this time.
When you're done, go to Receiver>> Action>> then click Save Config. Otherwise, every time you unplug your gps, it will revert back to the original configuration.