Attention Terminal - AT Commands

Modem are really beautiful entity which will interact with other entities ,collect data behaves according to expectations and provide desired results

Many definitions simple answer : Modulator +DeModulator (MO +DeM)

What are the types ?

Wireless Modem : Present mobile industry uses commonly where we see MOBILE - related Modems companies like Qualcomm, Mediatek works on

Ethernet Modem: WI-FI!! famous name doesn't need much explanation .

Challenges :

How to give instruction to Modem if NO User interface?

How to get guidance and information from Modem ? What really happend at what time?

On- spot solution -ATTENTION TERMINAL COMMANDS

Standards to understand AT Command : Reference 3GPP 27.007

Coming to Reality !!

AT commands really vary from organisation to organisation even Project to Project whereas some commands are standard used across but some changes massively.

Variety for AT Commands :

AT is basically interfacing for Modem where we don't have U.I. (User interface ).

So if we want to run Automation with AT Commands do we have any options?

Yeah !!

• SIL : Script Interface Layer is on top layer which can handle one or multiple AT commands and can guide the protocol stack directly without using AT interface

Other options are :

• BATCH : We can use .batch files with minute time delays for multiple AT commands execution
• SCRIPTS : We can write python/perl scripts calling correct framework.

Important and relevant AT commands required to execute while in Project.

1.AT+CGMI: To check the Binary /Build /Manufacturers

2.AT+CGSN :For IMEI Check

3.AT+CPIN: To Check Sim Card detected or not (AT+CPIN?)

Related to Call+ SMS + DATA

Some important commands

Initial PDP context activation +CIPCA

Request international mobile subscriber identity +CIMI

Call waiting +CCWA

Call hold +CHLD

For more clarity I seen one website which helped me a lot for searching multiple AT commands and related detailing please follow the same.

https://m2msupport.net/m2msupport/at-commands-to-get-device-information/