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[51] Need help in Proteus simulation of GSM and GPS via compim

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14hundredcc

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Hi!
I want to connect GSM modem (SIM 300) and GPS module (SR90) to laptop via two USB-to-DB9 converter cables, for Proteus simulation using compim. I have two free USB ports on laptop for that.

Here is the Proteus screenshot:
01screen_proteus.png


As mentioned in this reply https://www.edaboard.com/threads/293626/#post1258983 , I made two free ports; COM1 and COM2 in Device manager.
04DeviceManager.PNG

But it says '...over Bluetooth link' . It doesn't look right. Do I need to install USB to UART Bridge VCP Drivers from here ?

Also, what changes to I have to make in the Properties windows of both the compims?
Here are the default values:

1) of GSM modem's compim
02GSMcompimPropertiesWindow.PNG

2) of GPS's compim
03GPScompimPropertiesWindow.PNG
 

14hundredcc

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Thank you everybody for helping. :p

This is how I solved it:
Change the physical and virtual baud rates of GSM to 9600, and that of GPS to 4800.

Setting the same in Hyperterminal, the GSM modem works; 'AT' gives 'OK', but the GPS modem gives unreadable ASCII data. Do I have to tweek some settings? I use Progin SR-90 (https://www.vegarobokit.com/index.php?route=product/product&product_id=486)

Also tell me what adapter do we need for SR-90? The description page doesn't mention anything about the power requirements. Will a 4.9V/450mA DC adapter work?
On giving 9V AC (it has on-board W10M rectifier), the 7805 regulator IC quickly becomes hot.
 

milan.rajik

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Set baudrate to 9600 bps for COM port used for GPS module in device manager. I have a GPS module and its default baudrate is 9600 bps.
 

14hundredcc

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Thanks mate, that worked. Now I'm getting proper coordinates in Hyperterminal. Can you tell me which adapter have you used for it?
 

milan.rajik

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I didn't use and USB2RS232 adaptor. My GPS module has both 5V TTL and USB interface.
 

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