Sample Connection diagram Support the following AT commands. • AT AT command test • AT+CSQ GSM Signal strength • AT+CREG? Network Info • ATI Modem/Module informations • AT+GMR Hardware version • AT+GSV Firmware version • AT&F Modem reset • AT&W Configuration Save • AT+CPOWD=1 Power Off • ATD Voice Call • ATH HangUp Call • AT+CMGS SMS Sending • Also sending custom AT commands • receiving respond string from Modem and display in Hex format How to run, • Connect PC and modules • Run ATester, choose COM port and speed, presses connect button. • Power up module.

Aug 27, 2015 - AT Commands Tool for GSM/GPRS Modem, Modules. Working together to host and review code, manage projects, and build software together. Date: 20 Aug 2015 infos: This is hale AT command test too for SIMCOM.

Will see “yyyyyyyyyy” like message when module is power up. • Press “AT” button, will see “OK” message in receive terminal is module is working. • Press “Signal” and “Network” buttons to check whether modem is associated with GSM network. Will show “+CSQ:22,0” for signal where 22 is signal quality (something liked bars in your handset). Higher number is indicated that strong in signal. For network, will show “+CREG: 1,1” “OK”. This means modem is associated with GSM network.

Tips: Message reply with “OK” means command is corrected executed (not means it is worked). Message responds with “Error” indicates that there is error in command. Check details in AT command manual like this. • If these steps are fine, modem and software are working well. If something is wrong, consult with these, • – • – To be add SMS Receiving Manny commands neet to add such as AT+CREG, AT+CGMI, AT+CGMM, AT+CGSN, AT+CGMR, AT+CIMI, AT+CPBR Decoding respond from modem (Some feedback string need to phrase for more understandable) GPS?

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Only for SIMXX8 modules GPRS support? Custom AT commands set editing and saving in config files for different modules. I will add more commands and functions soon. Download: oakkar7 okelectronic.wordpress.com.

Contents • • • • • • • • • • • Introduction is an online tool for testing AT commands and other module features such as,,,,,,,, etc. AT Command Tester can be used with (GPRS/EDGE/1x) or (HSDPA/HSPA/EVDO) or (LTE) How to use AT Command Tester with the GPRS Shield AT Command Tester need to communicate directly with the SIM908 module. Download the sketch under the section 'How to drive the GSM Mode via USB port' from above to you arduino board. Press the 'RST' button on the SIM908 shield. Make sure that only the 'PWR' LED is turned on red.

The 'STAT' and 'NET' LED should be OFF. On the AT Command Tester, press the 'Find Ports' button. It should list the port that your Arduino board is connected to.

Then select the right baud rate. The default rate for the shield is set to 9600. Then press 'Connect' button. If a successful connection is established, AT Command Tester should get device info as shown below.

Free download software tv. Now you can send supported AT commands in the 'Command' tab or exercise any other features from the other tabs. Send batch of AT Commands Under the 'Script Mode' tab, you can send batch of AT commands. You can create your own script and store it on your local computer. Modem Diagnostics The 'Diagnostics' tab can be used to get some basic modem information such as signal strength, whether the modem is registered, operator info, connection status etc. SIMCOM_Ltd OK Manufacturer: SIMCOM_Ltd SIMCOM_SIM908 OK Model Number: SIMCOM_SIM908 Revision:1137B04SIM908M64_ST OK Revision: Revision:1137B03SIM900M64_ST +CSQ: 8,0 OK Signal level is -97 dbm. Signal condition is marginal.The signal strength range is -53 dbm (Excellent) to -109 dbm (Marginal). +CREG: 0,1 OK The device is registered in home network.