EC20（一）——AT指令

AT+CSQ ：Signal Quality Report， 查詢信號強度；

AT+CGMM ： Request Model Identification， 查詢模式ID；

AT+GMM： 和AT+CGMM 完全相同；

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AT+IFC ：Set TE-TA Local Data Flow Control， 設置串口數據流

eg: “AT+IFC=0,0\r\n”    , RTS與CTS均不開啓。

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AT&D：Set DTR Function Mode， 設置DTR

eg: “AT&D0\r\n”    , 忽略DTR狀態。

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AT+CMEE： Error Message Format， 設置錯誤信息樣式

The command controls the format of error result codes: ERROR, error numbers or verbose messages as
+CME ERROR: <err> and +CMS ERROR: <err>.

eg: AT+CMEE=2   ，Enable error result code with verbose (string)，用長字符串使能返回結果碼。   AT+QCCID ：Show ICCID，查看SIM卡的ID eg:

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AT+GSN ：Request International Mobile Equipment Identity (IMEI)，查詢IMEI。作用和AT+CGSN完全一樣.

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ATE ：Set Command Echo Mode， 設置是否迴應。

The command controls whether or not the module echoes characters received from TE during AT command mode.
 

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AT+CPIN ：Enter PIN， 鍵入PIN碼

The command is used to enter a password or query whether or not the module requires a password which
is necessary before it can be operated. The password may be (U)SIM PIN, (U)SIM PUK, PH-SIM PIN, etc.
 

 

 

eg:

//Enter PIN
AT+CPIN?
+CPIN: SIM PIN //Queried PIN code is locked
OK

AT+CPIN=1234 //Enter PIN
OK

+CPIN: READY
AT+CPIN? //PIN has already been entered
+CPIN: READY
OK

//Enter PUK and PIN
AT+CPIN?
+CPIN: SIM PUK //Queried PUK code is locked
OK

AT+CPIN="26601934","1234" //Enter PUK and new PIN password
OK

+CPIN: READY
AT+CPIN?
+CPIN: READY //PUK has already been entered
OK

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AT+IPR ：Set TE-TA Fixed Local Rate， 設置波特率

The command is used to query and set the baud rate of the UART. The default baud rate value (<rate>) is 115200bps. The setting of <rate> will not be restored with AT&F。

eg:

AT+IPR=115200 //Set fixed baud rate to 115200bps.
OK

AT&W //Store current setting, that is, the serial communication speed is
115200bps after restarting module
OK

AT+IPR?
+IPR: 115200
OK

AT+IPR=115200;&W //Set fixed baud rate to 115200bps and store current setting
OK

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AT+CREG ：Network Registration Status，網絡註冊狀態。

The Read Command returns the network registration status. The Write Command sets whether or not to
present URC。

 eg：

 

//In Non-CDMA mode
AT+CREG=1
OK

+CREG: 1 //URC reports that ME has registered on network
AT+CREG=2 //Activate extended URC mode
OK

+CREG: 1,"D509","80D413D",2 //URC reports that operator has found location area code and
cell ID

//In CDMA mode
AT+CREG=1
OK

+CREG: 1 //URC reports that ME has registered on network
AT+CREG=2 //Activate extended URC mode
OK

AT+CREG?
+CREG: 2,1,"3747","A23C2",100 //Query the system ID, network ID and BTS ID of CDMA
network
OK

 

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ATS0 ：Set Number of Rings before Automatically Answering Call。

The command controls automatic answering mode for the incoming calls。

【注意】：If <n> is set too high, the calling party may hang up before the call is answered automatically。

ATS0=3 //Set three rings before automatically answering a call
OK

RING //A call is coming

RING

RING //Automatically answering the call after the three rings

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AT+QCFG ：Extended Configuration Setting。

The command is used to query and configure various settings of UE。

其中：AT+QCFG="risignaltype" ：RI Signal Output Carrier。

The command specifies the RI (ring indicator) signal output carrier.

 參考：

Quectel_EC25&EC21_GNSS_AT_Commands_Manual_V1.0