Click on our menu buttons immediately below to find MegaSquirt® information quickly: General Info. Manual Index; FAQ. Full FAQ List. What is MegaSquirt®. Port: COM1; If the merchant is using an ethernet cable instead of the serial cable, make sure to select the port the ethernet cable is being plugged into in the back of the monitor (EX. COM2, COM3, etc.). Click on 'Pin Pad Settings' 8. Type in IP Address from PAX S300 then click 'OK'.
I'm asking this as a last resort because I've tried everything I can think of:![Serial port settings Serial port settings](https://i0.wp.com/www.chargelogic.com/wp-content/uploads/2018/04/Setup-PIN-Pad-12.png?ssl=1)
I have a 9-pin serial device something like this:
My laptop does not have a Serial-port, only USB ports.
In theory, if i get a Serial-to-USB converter the device should behave *exactly* the same as if it were plugged into a normal Serial/COM port, and, the Windows application that is talking to it will see the virtual COM Port (e.g. COM1) and talk to it *exactly* like it would a normal Serial device.
But I have bought 3 Serial-to-USB converters and only 1 seems like it is able to 'talk' to the device.
There is a catch...
Only this proprietary software that I got from a vendor is able to 'talk' to the device.
It talks just fine on a computer with a built-in serial port,
but it fails on my laptop with a Serial-to-USB converter.
I called the vendor in and they've tried to help, but they are not that tech savvy, and I know others have succeeded with my same software.
Does anybody have any advice or ideas?
Update:
I should mention, I've tried 3 different converters and 3 different pin-pads and we've changed all the COM port settings to try different COM ports.
With the 1 converter I got, the device 'responds' to commands with the software, but the software still says it can't communicate with the device - and yet if I look at its trace tests in the logs I can indeed see the device is sending responses (only with the 1 converter).
How is it possible that this works just fine on a PC with a built-in COM port, but completely fails on another PC with a converter?
Start by going to the Device Manager. Once there do the following:
Expand the Ports ‘(COM& LPT)’
You should be looking at something like this:
As you can see Windows has set the port to COM10. However many legacy applications expect the port to be between 1-4. Let’s change that:
Right click on the device and click on ‘Properties’.
Click on ‘Port Settings’. Then click on ‘Advanced…’.
Once you’re in ‘Advanced Settings for COM10’ on the bottom you can see the ‘COM Port Number: COM10’. Click on that to change it to the lowest possible number (between 1-4).
Then click ‘OK’ on all open Property Windows.
Now the device should look like this: