AT Command Tester – Troubleshooting Guide

[AdminKeymaster]

AT Command Tester is a desktop-based software to test and learn various features of GSM (2G/3G/4G) modem devices. All GSM technologies (GPRS/EDGE/UMTS/HSPA/LTE) are supported. The tool can be used with any GSM-based device such as modules, phones, tablets, 2G/3G routers, M2M devices etc..The tool uses AT commands for communication, which are supported by all GSM devices.

Step #1 – Opening AT Command Tester
Download and install AT command tester. Open the application from desktop shortcut or Start->AT Command Tester->Run AT Command Tester.

Step #2 – Connecting the Device
AT Command Tester connects to the serial port of the device which is connected to the PC.
Once the software drivers for the device (provided by the device manufacturer) are properly installed on the system, device ports should be avaialble to connect. Please check instructions for how to find the device ports.

If you are using Arduino-based shields, please check here for configuring the shield to work with AT Command Tester.

Once you identify the correct device port, choose the correct port speed on the AT Command Tester. The devices may be configured for specific serial port speed (such as 9600, 19200, 115200) or they may also be configured for autobaud which means devices can connect on any speed. If the device is configured for autobaud, AT Command Tester will connect to the device irrespective for the baud rate setting.

Once you select the device port and the correct baud rate (serial port speed), press ‘Connect’ on the AT Command Tester. The tool will send a query to the device. If teh query is successful, it will show the model, manufacturer and status under the ‘Connection’ section of the tool.

Here is the sample output of a successful device connection.
Successful Connection Output`
No port is connected.

Sending AT query..
AT

OK
Successful response for AT query..

AT+CGMM

SIMCOM_SIM900

OK
Model Number : SIMCOM_SIM900
AT+CGMI

SIMCOM_Ltd

OK
Manufacturer : SIMCOM_Ltd`

If you see junk characters returned when you press 'Connect', it is more likely that the baud rate (port speed) is not configured correctly. You'll see a response like below,
Unsuccessful Connection Output`
Sending AT query..
iÿ
Invalid or no response from the device. Please check the modem port and the baud rate.

Disconnecting port COM21.
`

If AT Command Tester is not successfully connecting to the device, verify the serial connection using Putty.

Step #3 – Send logs
If you’re still having issues, press “Need Support?’ button on the application and send diagnostic info.

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[Cíntia Pinheiro]

Invalid or no response from the device. Please check the modem port and the baud rate.Disconnecting port COM5.

i’m using a BT hc-06 (Linvor) it’s conneting to COM5 and Baud Rate =9600

Why this is not working?

[AdminKeymaster]

Are you able to communicate with the device through Putty or HyperTerminal?

To check communication with Putty,

Check Serial Connection Using Putty

[Kyle Sweet]

I can connect and disconnect repeatedly using Hyperterm and other terminal applications but M2MSupport.net’s AT Command Tester does not work. Perhaps I need more control beyond only selecting 115200.

Java Plug-in 11.77.2.03
Using JRE version 1.8.0_77-b03 Java HotSpot(TM) Client VM
User home directory = C:\Users\U324370
—————————————————-
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
—————————————————-
Missing Permissions manifest attribute in main jar: https://www.m2msupport.net/m2msupport/wp-content/themes/admired/ATCommandTester_v27.jar
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
COM3 – Serial
COM8 – Serial
COM9 – Serial
COM10 – Serial
COM11 – Serial
COM3
COM8
COM9
COM10
COM11
PortIdentifier is gnu.io.CommPortIdentifier@8bd2cb

commPort is //./COM8

AT

[Joeri]

I have the same problem as Cíntia Pinheiro.

I can connect with putty using same port and baud rate.

grts
Joeri

[Moustapha]

ok

[Rod]

It is no longer displaying the at commands being sent only the responses

Nice software thank you vet much!

[Sam]

Hi! Guys,

I am Sam. Please help me. I want to test my modem. But when I have opened the software and find ports it replied “License is Invalid”. Please help what will i do regarding this issue?

[Klaus]

hi,

tried download of SetupATCommandTester.exe now several times, but always get a virus information and avira puts it into quarantine immediately. It says: TR/Dropper.Gen” found. No chance to run since avira stops executing even when i say “ignore” if I try to get it out of quarantine.

also Java version is not running on win10. It always wants to install new java, but my version is the latest.

Please help.

Under win 8 I was successful running the jave version an was very satisfied with this Programm.

[AdminKeymaster]

Hi Klaus,
Did you try exclude the process from scanning?

https://www.avira.com/en/support-for-home-knowledgebase-detail/kbid/900

Tks..

[Nick]

My modem doesn’t like the first at command ever it seems. But any following ones will work. Anyone seen this/know a work around for it so at command tester will actually connect?

[veer]

hello,
thanks for this great tool. i recently downloaded this tool after using the browser version of the tool. when i run the tool and try to find the ports i get a “license is invalid” message. could you please let me know how to fix this issue? tia

[lucas]

Number of days valid 21
Found ports :COM6

Sending AT query..

Invalid or no response from the device. Please check the modem port and the baud rate.Disconnecting port COM6.

[Sergio Toro Escofet]

Hi, has any one try to modify an MR of a SMS before send it?. I like to assign an uuid string to an message as id instead of an random integer autogenerated by the modem. Thanks in advantage.

[Michael]

Hi,

I want to use the AT Command Tester Tool to send some data via http/https. But I can´t see the folders HTTP, FTP, GPS, TCP/UDP, Email in the program. Is this because it´s unregistered or is it because this service is not supported by the operator? I tried some http and email connections by the command line but they all failed. The connection is fine and a IP address is set.

[Author]

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