Under Construction
Quectel AT Command Reference
AT commands are the universal language to interact with and control cellular modems (provided by the modem vendors like quectel).
This online doc consolidates and organizes the AT commands used with Quectel modems.
1. Reference manaul
Source: Quectel_AT_Commands_Manual_PDF
Applicable to following Quectel models:
- RG520N
- RG52xF
- RG530F
- RM520N
- RM530N
2. Command categories
SIM-related AT commands
SIM Card
| AT Command | Purpose | Example | Expected Output |
|---|---|---|---|
AT+CPIN? |
Check SIM card status | AT+CPIN? |
+CPIN: READY (SIM is already unlocked) |
AT+CPIN=<pin> |
Enter SIM PIN to unlock SIM | AT+CPIN="1234" |
OK or ERROR if PIN wrong |
AT+CSIM |
Send raw APDU commands to SIM (advanced use only) | AT+CPIN? |
+CPIN: READY (SIM is already unlocked) |
AT+QCCID |
Read SIM card ICCID (serial number) | AT+QCCID |
+QCCID: 898600xxxxxxxxxxxx OK |
AT+CLCK |
Enable/disable SIM lock (PIN protection) | AT+CLCK="SC",0,"1234" |
OK – disables SIM lock |
AT+CPWD |
Change SIM PIN code | AT+CPWD="SC","1234","5678" |
OK |
AT+CLCK? |
Check if SIM PIN lock is enabled | AT+CLCK="SC",2 |
+CLCK: 1 (enabled), +CLCK: 0 (disabled) |