# TCP and adl\_CmdSubscribe

**URL:** <https://forum.sierrawireless.com/t/tcp-and-adl-cmdsubscribe/7237>\
**Category:** Legacy AirPrime modules\
**Created:** [June 3, 2014, 10:15am UTC](https://forum.sierrawireless.com/t/tcp-and-adl-cmdsubscribe/7237 "2014-06-03T10:15:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fanate65](https://avatars.discourse-cdn.com/v4/letter/f/3ec8ea/32.png) [@fanate65](https://forum.sierrawireless.com/u/fanate65)\
**Post date:** [June 3, 2014, 10:15am UTC](https://forum.sierrawireless.com/t/tcp-and-adl-cmdsubscribe/7237/1 "2014-06-03T10:15:32Z")

</div>

Good day.  
I am using adl\_atCmdSubscribe.  
If connect UART1 then my command is works properly.  
But if connect to GPRS , use adl\_atCmdCreate (UART1):  
AT - return OK  
AT+CSQ - return +CSQ: 20,99  
AT+IPR? - return +IPR:115200  
AT+TEST - return ERROR.  
Why? Where did I go wrong?  
If connect UART1:  
AT+TEST - return +TEST OK.

-“Developer Studio”,“2.3.2.201310241753”  
-“Open AT Application Framework package”,“2.52.0.201307100830”  
-“Open AT OS Package”,“6.52.0.201306271400”  
-“Firmware Package”,“7.52.0.201306260837”  
-“Internet Library Package”,“5.56.0.201305170830”

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<div class="post-metadata">

**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [June 4, 2014, 2:49pm UTC](https://forum.sierrawireless.com/t/tcp-and-adl-cmdsubscribe/7237/2 "2014-06-04T14:49:40Z")

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Hi,

I did not understand your use case.  
AT+TEST command is a customized command so you have to subscribe to this command using adl\_atcmdsubscribe(). If you dont subscribe, it will definitely give an error.

can you share your code??

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<div class="post-metadata">

**Author:** ![fanate65](https://avatars.discourse-cdn.com/v4/letter/f/3ec8ea/32.png) [@fanate65](https://forum.sierrawireless.com/u/fanate65)\
**Post date:** [June 9, 2014, 7:59am UTC](https://forum.sierrawireless.com/t/tcp-and-adl-cmdsubscribe/7237/3 "2014-06-09T07:59:41Z")

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> [@Rex\_alex](#):
>
> Hi,
> 
> I did not understand your use case.  
> AT+TEST command is a customized command so you have to subscribe to this command using adl\_atcmdsubscribe(). If you dont subscribe, it will definitely give an error.
> 
> can you share your code??

Code:  
subscribe

```auto
void MainTask(void)
{ .............
......
adl_atCmdSubscribe("AT+TEST", (adl_atCmdHandler_t)command_handler,
				ADL_CMD_SUBSCRIPTION_ALL_PORTS|
							ADL_CMD_TYPE_TEST|ADL_CMD_TYPE_READ|
							ADL_CMD_TYPE_ACT|ADL_CMD_TYPE_PARA|0x0011);
............
.......
}
```

use adl\_atCmdCreate in TCP session

```auto
...
case WIP_CEV_READ:
         while ((Read=wip_read(ev->channel,DataRead, sizeof(DataRead)))>0)//ev->content.read.readable);
			switch (Read)
			{
			case WIP_CERR_CSTATE:
				TRACE ((3,"WIP_CERR_CSTATE= %d",Read));
			break;
			case WIP_CERR_NOT_SUPPORTED:
				TRACE ((3,"WIP_CERR_NOT_SUPPORTED= %d",Read));
			break;
			default:
				TRACE ((3,"Read= %d",Read));
				TRACE((3,(ascii *)DataRead));
				DataRead[Read]='\0';
				TRACE((3,(ascii *)DataRead));
			break;
			};
			TRACE ((3,"AT-Command"));
			//wip_write(ev->channel,DataRead, sizeof(DataRead)); //echo
			TRACE ((3,"Befo adl_atCmdCreate"));
			editPortServer=ev->channel;
			TRACE ((3,"DataRead"));
			TRACE ((3,DataRead));
			CmdRet=adl_atCmdCreate( DataRead,ADL_AT_PORT_TYPE(ADL_PORT_UART1,FALSE),(adl_atRspHandler_t)CmdAnsver_Handler,"*",NULL);
			//adl_atCmdCreate( "AT+IPR?",ADL_AT_PORT_TYPE(ADL_PORT_UART1,FALSE),(adl_atRspHandler_t)CmdAnsver_Handler,"*",NULL);
			TRACE ((3,"Afte adl_atCmdCreate"));
			switch (CmdRet)
			{
				case OK:
					wip_write(ev->channel,"AT-Command OK", sizeof("AT-Command OK"));
					TRACE ((3,"AT-Command OK"));
				break;
				default:
					wip_write(ev->channel,"AT-Command ERROR", sizeof("AT-Command ERROR"));
					TRACE ((3,"AT-Command ERROR"));
				break;
			};
break;
...
```

CmdRet - return OK (“AT-Command OK” in TRACE)  
The handler:

```auto
bool CmdAnsver_Handler (adl_atResponse_t *paras)
{
	bool ret=FALSE;
	TRACE((3,"paras->StrData"));
	TRACE((3,paras->StrData));
	TRACE((3,"editPortServer: %d", (int) editPortServer));
	wip_write(editPortServer,(ascii *)paras->StrData, wm_strlen(paras->StrData));
	return ret;
}
```

paras-\>StrData - return OK if i am request AT  
paras-\>StrData - return +IPR:115200 if i am request AT+IPR?  
paras-\>StrData - return +CSQ: 25,99 if i am request AT+csq  
paras-\>StrData - return +CME ERROR: 3 if i am request AT+TEST?

But if i am connected UART1 (HiperTerminal COM4)  
request AT+TEST? - return OK