EBD050 AT Commands

Quectel RG520N-EB AT Commands

Basic / General Commands

Command	Description
AT	Test command. Checks whether the modem is powered and responding.
ATI	Displays module identification information.
AT+CGMI	Returns manufacturer identification.
AT+CGMM	Returns module model identification.
AT+CGMR	Returns firmware revision information.
AT+CGSN	Returns the modem IMEI number.
AT+QGMR	Returns detailed firmware version and build information.
AT+QCCID	Returns the SIM ICCID number.
ATZ	Restores the active profile from non-volatile memory.
AT&F	Restores factory default settings.
AT&W	Saves the current configuration.
AT&V	Displays current and stored configuration.
ATE0 / ATE1	Disable / Enable command echo.
AT+CMEE=1	Enable numeric CME error reporting.
AT+CMEE=2	Enable verbose CME error reporting.
AT+CLAC	List all supported AT commands.
AT+CFUN=1,1	Reboot the modem.
AT+QRST=1	Perform a software reset.

SIM Card

Command	Description
AT+CIMI	Read IMSI from the SIM card.
AT+QCCID	Read SIM ICCID number.
AT+CPIN?	Check SIM status.
AT+CPIN="1234"	Enter SIM PIN code.
AT+CPWD="SC","old","new"	Change SIM PIN.
AT+CLCK="SC",2	Query SIM lock status.
AT+QSIMSTAT?	Display SIM insertion status.
AT+QSIMDET=1,1	Enable SIM hot-plug detection.

Network Registration & Status

Command	Description
AT+CREG?	Query circuit-switched registration status.
AT+CGREG?	Query packet-switched registration status.
AT+CEREG?	Query LTE/5G EPS registration status.
AT+COPS?	Display currently selected operator.
AT+COPS=?	Scan available operators.
AT+COPS=0	Enable automatic operator selection.
AT+COPS=1,2,"26001"	Select operator manually using MCC/MNC.
AT+CSQ	Display RSSI signal strength.
AT+CESQ	Display extended signal measurements.
AT+QCSQ	Display technology-specific signal quality.
AT+QNWINFO	Display current RAT, operator and frequency band.
AT+QENG="servingcell"	Display serving cell information.
AT+QENG="neighbourcell"	Display neighboring cell information.
AT+CPAS	Display modem activity status.

APN & PDP Context (Data Connection)

Command	Description
AT+CGDCONT?	List configured PDP contexts.
AT+CGDCONT=1,"IP","your.apn"	Configure IPv4 PDP context.
AT+CGDCONT=1,"IPV4V6","your.apn"	Configure IPv4/IPv6 PDP context.
AT+CGACT?	Display active PDP contexts.
AT+CGACT=1,1	Activate PDP context.
AT+CGACT=0,1	Deactivate PDP context.
AT+CGPADDR=1	Display assigned IP address.
AT+CGCONTRDP=1	Display dynamic PDP parameters.
AT+CGAUTH=1,1,"user","pass"	Configure PDP authentication.
AT+QICSGP=1,1,"apn","user","pass",1	Configure APN and authentication.
AT+QIACT=1	Activate data context.
AT+QIDEACT=1	Deactivate data context.
AT+QIACT?	Query active context information.

Network Mode & Band Selection

Command	Description
AT+CFUN?	Query current functionality level.
AT+CFUN=0	Disable RF and enter minimum functionality.
AT+CFUN=1	Enable full functionality.
AT+CFUN=4	Enable flight mode.
AT+CFUN=1,1	Restart the modem.
AT+QNWPREFCFG="mode_pref"	Query or configure preferred radio technologies.
AT+QNWPREFCFG="mode_pref",NR5G	Force NR5G operation.
AT+QNWPREFCFG="mode_pref",LTE	Force LTE operation.
AT+QNWPREFCFG="mode_pref",LTE:NR5G	Allow LTE and NR5G operation.
AT+QNWPREFCFG="policy_band"	Query configured LTE and NR5G bands.
AT+QNWPREFCFG="srv_domain"	Configure service domain preferences.
AT+QNWPREFCFG="voice_domain"	Configure voice domain preferences.
AT+QNWPREFCFG="roam_pref"	Configure roaming preferences.

5G Specific Commands

Command	Description
AT+QENDC	Display EN-DC (LTE + NR Dual Connectivity) status.
AT+QCAINFO	Display carrier aggregation information.
AT+QNWCFG="lte_cell_id"	Display LTE cell identity information.
AT+QNWCFG="nr5g_cell_id"	Display NR5G cell identity information.
AT+QNWCFG="up/down"	Display current uplink and downlink throughput.
AT+QRSRP	Display detailed RSRP measurements.
AT+QRSRQ	Display detailed RSRQ measurements.
AT+QSINR	Display SINR measurements.

SMS

Command	Description
AT+CMGF=1	Set SMS text mode.
AT+CMGS="+37060000000"	Send SMS message.
AT+CMGL="ALL"	List all stored SMS messages.
AT+CMGR=1	Read SMS at index 1.
AT+CMGD=1	Delete SMS at index 1.
AT+CNMI=2,1,0,0,0	Enable SMS notifications.

Serial / Interface

Command	Description
AT+IPR?	Query UART baud rate.
AT+IPR=115200	Set UART baud rate.
AT+IFC=2,2	Enable RTS/CTS flow control.
AT+CMUX=0	Enable GSM multiplexing.
AT+QURCCFG="urcport","uart1"	Route URCs to UART1.
AT+QCFG="usbnet"	Query USB networking mode.
AT+QCFG="usbnet",0	Set QMI/RMNET mode.
AT+QCFG="usbnet",1	Set ECM mode.
AT+QCFG="usbnet",2	Set MBIM mode.
AT+QCFG="usbnet",3	Set RNDIS mode.
AT+QCFG="usbnet",5	Set NCM mode.

Power Management

Command	Description
AT+CFUN=0	Minimum functionality mode.
AT+CFUN=4	Flight mode.
AT+CFUN=1,1	Full modem restart.

Diagnostics & Debugging

Command	Description
AT+CEER	Display last network or call error.
AT+CGCONTRDP=1	Display current PDP information.
AT+QENG="servingcell"	Display serving cell diagnostic information.
AT+QENG="neighbourcell"	Display neighboring cell information.
AT+QNWINFO	Display current network and band information.
AT+QCSQ	Display detailed signal information.
AT+QRSRP	Display detailed RSRP values.
AT+QRSRQ	Display detailed RSRQ values.
AT+QSINR	Display detailed SINR values.
AT+QCAINFO	Display carrier aggregation status.
AT+QENDC	Display EN-DC status.
AT+QCFG?	Display Quectel configuration parameters.
AT+QINDCFG?	Display URC configuration.
AT+CLAC	List all supported AT commands.

Note: This document covers only the essential AT commands supported by the device. For the full AT command reference, please contact Quectel directly.