Embedded module manufacturing is incomplete without a proper test utility. We offer a nice, user interface for testing any type of GSM Modem which can be interfaced using UART Serial protocol with a system running Windows OS.
Power supply requirement:
For RS232 type modem mentioned in this link, requires adapter/battery of 12 Volt 1-2 Ampere current rating for reliable operation. DC Jack can be used to feed the input power.
For TTL Modem mentioned in this link, use 5 Volt, 1-2 Ampere adapter or Power bank.
The utility was actually developed for testing the SIM900A GSM modules manufactured by Elementz Engineers Guild Pvt Ltd. With the increase in demand and for quick testing we are providing the tool as a free software. The tool can be downloaded from our GitHub repository or from here.
This post describes the test method for SIM900A Modems, but virtually can test any Modem which supports UART protocol.
As shown in the above figure, user has to Scan for COM port using “Scan ports” button, select the COM port from the Port List. Choose the correct BaudRate(Default baudrate of Elementz SIM900A module is 9600). Click Open port and check the dialog box whether the COM port is opened. If opened sucessfully “Port opened successfully” should appear in the dialog box as shown below.
For making a call, just type the Phone number inside the box and Press Call. For disconnecting the call press End Call.
Similarly for sending SMS to a particular number, fill the Phone number Box and type your message in Message box and click Send.
For Modems other than SIM900, there is a provision for testing the modem using AT Command dialog box.
For example: for reading SMS from memory location 1 type
AT+CMGR=1 and press Enter
The message will be displayed in the Message Box.