R. Bush

Unable to Open Serial Port

13 posts in this topic

I just got a new Garmin Geko 201 GPS, and have purchased an interface cable and am trying out your software. When I tray and upload or download data to the GPS unit I get the error message "The Serial Port could not be opened".

Your software is set to COM1 and 9600, and the GPS is set to GPS Mode = Normal and I/O Format = Garmin.

Any help in getting this thing up and running would be appreciated. Thanks.

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Try rebooting, and if that doesn't help, see steps #1 and #4.

Most requests for assistance with GPS issues that we receive can be

traced back to an improper configuration. If EasyGPS or ExpertGPS

fails to identify your GPS, it's almost certainly a problem with your

configuration. Please check the following, and include these answers

in your reply:

1. Have you selected the correct COM port? If it isn't

COM1, please let us know why when you ask for assistance.

2. Is your GPS configured properly? Garmin GPS receivers should be in

GARMIN or GRMN/GRMN HOST interface mode. Magellan GPS receivers

should have NMEA output turned off, and the baud rate on the GPS and

in the software must be set to 9600 baud.

3. Is your serial cable plugged in tightly? Garmin eTrex GPS

receivers are notorious for failing to make a connection if the cable

isn't pushed in all the way.

4. Can you successfully update your GPS firmware today? Visit your

GPS manufacturer's website, and update your firmware. If the updater

program can't identify your GPS, our software won't either.

5. Have you ever been able to connect this GPS to software on this PC?

Which programs worked? What settings did you use?

6. What is the exact wording of the first GPS error message you get

from our software? Have you clicked the More Info button and followed

any advice given?

If you're still can't get your GPS working with our software, send

back a description of the problem along with your answers to these

questions. You must also include the error log from the program,

immediately after the error occurs. Without this file, we can't

provide any assistance with your specific problem. You will find this

file in the same folder as the program you're running. For example:

C:\Program Files\EasyGPS\EasyGPS_Message_Log.txt

C:\Program Files\ExpertGPS\ExpertGPS_Message_Log.txt

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For what it is worth:

When I have problems with accessing a device plugged into serial port it is usually another piece of software hogging the port. This can be software for a camera, a PDA or any other device that has the option to use a serial port. In the case of my PDA I use a USB link, but it's software still likes to hold onto the serial port anyway.

Check which software is running on your task bar and see if one of these might be the culprit.

Regards

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For what it is worth:

When I have problems with accessing a device plugged into serial port it is usually another piece of software hogging the port. This can be software for a camera, a PDA or any other device that has the option to use a serial port. In the case of my PDA I use a USB link, but it's software still likes to hold onto the serial port anyway.

Check which software is running on your task bar and see if one of these might be the culprit.

Regards

:) Thanks for the advice! This was exactly the problem I was having.

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I am having trouble with my Garmin Etrex Legend, connected through a USB port using a USB to Serial Converter cable. I have checked all the cable connections, reinstalled the drivers for converter cable, I had previously updated firmware for Legend. I had successfully hooked the Legend up to my desktop (running Win 98) but it crashed last night. I also double-checked all the Easy GPS Preference settings (and Legend ones on the Setup screen).

Help! Please see error log attached.

Thanks in advance,

S Van

Try rebooting, and if that doesn't help, see steps #1 and #4.

Most requests for assistance with GPS issues that we receive can be

traced back to an improper configuration. If EasyGPS or ExpertGPS

fails to identify your GPS, it's almost certainly a problem with your

configuration. Please check the following, and include these answers

in your reply:

1. Have you selected the correct COM port? If it isn't

COM1, please let us know why when you ask for assistance.

2. Is your GPS configured properly? Garmin GPS receivers should be in

GARMIN or GRMN/GRMN HOST interface mode. Magellan GPS receivers

should have NMEA output turned off, and the baud rate on the GPS and

in the software must be set to 9600 baud.

3. Is your serial cable plugged in tightly? Garmin eTrex GPS

receivers are notorious for failing to make a connection if the cable

isn't pushed in all the way.

4. Can you successfully update your GPS firmware today? Visit your

GPS manufacturer's website, and update your firmware. If the updater

program can't identify your GPS, our software won't either.

5. Have you ever been able to connect this GPS to software on this PC?

Which programs worked? What settings did you use?

6. What is the exact wording of the first GPS error message you get

from our software? Have you clicked the More Info button and followed

any advice given?

If you're still can't get your GPS working with our software, send

back a description of the problem along with your answers to these

questions. You must also include the error log from the program,

immediately after the error occurs. Without this file, we can't

provide any assistance with your specific problem. You will find this

file in the same folder as the program you're running. For example:

C:\Program Files\EasyGPS\EasyGPS_Message_Log.txt

C:\Program Files\ExpertGPS\ExpertGPS_Message_Log.txt

EasyGPS_Message_Log.txt

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I am having trouble with my Garmin Etrex Legend, connected through a USB port using a USB to Serial Converter cable. I have checked all the cable connections, reinstalled the drivers for converter cable, I had previously updated firmware for Legend. I had successfully hooked the Legend up to my desktop (running Win 98) but it crashed last night. I also double-checked all the Easy GPS Preference settings (and Legend ones on the Setup screen).

Help! Please see error log attached.

Thanks in advance,

S Van

P.S. I have selected the COM Port 5 (Prolific USB to Serial Bridge) and in another instance COM Port 4 in case it was creating a virtual port. The Port 5 setting as you can see received info it could not interpret, and the Port 4 didn't communicate at all. Thanks!

EasyGPS_Message_Log.txt

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P.S. I have selected the COM Port 5 (Prolific USB to Serial Bridge) and in another instance COM Port 4 in case it was creating a virtual port. The Port 5 setting as you can see received info it could not interpret, and the Port 4 didn't communicate at all. Thanks!

I too am having an issue with USB to Serial connection and get the error when connected to Com4 AQF232 COM port "No Data Was Received From GPS"...I have installed the drivers several times, and have plugged the USB into at least 5 different slots with the same results

and this error with connected to COM 3 Virtual Port "This Program Recieved Data it Could Not Understand"

Using eTrex Legend. See attached log file for details.

Any Help is greatly appreciated:)

Aloha

Derry

EasyGPS_Message_Log.txt

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I have the same Problem with Geko201 and USB to COM Cable (AQF232). The GPS works if I attach it to a COM-Port directly, but does not work if I attach it to USB on the same PC (with installed AQF232 driver) using the USB 2 COM Adapter Cable. Hence there is a problem with the cable or the driver.

Peter

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I've tried your steps 1-6 and got rid of my Palm Hotsync, which helped somewhat. Now I get the error "No data was received from the GPS!", but it looks like it's trying to capture data. There is lots of data on my Foretrex 101, so that's not the problem. Any other suggestions? Here's the log file.

EasyGPS_Message_Log.txt

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Can you receive data from your GPS with Garmin MapSource or http://www.gpsu.co.uk ?

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I have a rino 130 and a etrek leagend i've been using my rino and just got the etrek last night. today i went to download some way point to the etrek and then i switched back to the rino and now i am getting the same gps error: the serial port could not be opened its not the gps because i disconnected my interface cable from the computer and tried downloading. the same error popped up some help please!

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I just got a new Garmin Geko 201 GPS, and have purchased an interface cable and am trying out your software. When I tray and upload or download data to the GPS unit I get the error message "The Serial Port could not be opened".

Your software is set to COM1 and 9600, and the GPS is set to GPS Mode = Normal and I/O Format = Garmin.

Any help in getting this thing up and running would be appreciated. Thanks.

I also attach my Nokia via a serial port. If autoloades, takes up com1, and gives me the error you noted. I have to disable the phone setting and then the eTrex works fine.

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:) Thanks for the advice! This was exactly the problem I was having.

Me too, - I was getting no reaction whenever I tried to connect via the serial port - just a message saying it was receiving data it could not understand - so I read this topic and had a look for conflicts. My Pda uses Microsoft Active Sync through a USB Port, but when I checked the connection settings I found out that the 'Allow serial cable connection through this Port' box was checked. I unchecked it and the connection to my GPS was suddenly effective.

Thanks for the help.

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