From Teltonika Networks Wiki
Quectel RG255C-GL AT Commands
Basic / General Commands
| Command |
Description
|
| AT |
Test command. Checks whether the modem is powered and responding to AT commands.
|
| ATI |
Displays module identification information.
|
| AT+CGMI |
Returns manufacturer identification.
|
| AT+CGMM |
Returns 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+QRST=1 |
Performs a software reset.
|
| AT&F |
Restores factory default settings.
|
| AT&W |
Saves the current configuration.
|
| AT&V |
Displays current and stored configuration.
|
| ATE0 / ATE1 |
Disable or enable command echo.
|
| AT+CMEE=1 |
Enable numeric CME error reporting.
|
| AT+CMEE=2 |
Enable verbose CME error reporting.
|
SIM Card
| Command |
Description
|
| AT+CIMI |
Reads the IMSI from the SIM card.
|
| AT+QCCID |
Reads the ICCID from the SIM card.
|
| AT+CPIN? |
Checks SIM card status.
|
| AT+CPIN="1234" |
Enters the SIM PIN code.
|
| AT+CPWD="SC","old","new" |
Changes the SIM PIN code.
|
| AT+CLCK="SC",2 |
Queries SIM lock status.
|
| AT+QSIMSTAT? |
Displays SIM insertion status.
|
| AT+QSIMDET=1,1 |
Enables SIM hot-plug detection.
|
Network Registration & Status
| Command |
Description
|
| AT+CEREG? |
Displays LTE/5G registration status.
|
| AT+COPS? |
Displays the currently selected network operator.
|
| AT+COPS=? |
Scans available operators.
|
| AT+COPS=0 |
Enables automatic operator selection.
|
| AT+COPS=1,2,"26001" |
Manually selects an operator using MCC/MNC.
|
| AT+CSQ |
Displays RSSI signal strength.
|
| AT+CESQ |
Displays extended signal measurements.
|
| AT+QCSQ |
Displays technology-specific signal quality information.
|
| AT+QNWINFO |
Displays current RAT, operator and frequency band.
|
| AT+QENG="servingcell" |
Displays detailed serving cell information.
|
| AT+QENG="neighbourcell" |
Displays neighboring cell information.
|
| AT+CPAS |
Displays modem activity status.
|
APN & PDP Context (Data Connection)
| Command |
Description
|
| AT+CGDCONT? |
Lists configured PDP contexts.
|
| AT+CGDCONT=1,"IP","your.apn" |
Configures IPv4 PDP context.
|
| AT+CGDCONT=1,"IPV4V6","your.apn" |
Configures IPv4/IPv6 PDP context.
|
| AT+CGACT? |
Displays active PDP contexts.
|
| AT+CGACT=1,1 |
Activates PDP context.
|
| AT+CGACT=0,1 |
Deactivates PDP context.
|
| AT+CGPADDR=1 |
Displays assigned IP address.
|
| AT+CGCONTRDP=1 |
Displays dynamic PDP parameters.
|
| AT+CGAUTH=1,1,"user","pass" |
Configures PDP authentication.
|
| AT+QICSGP=1,1,"apn","user","pass",1 |
Configures APN and authentication parameters.
|
| AT+QIACT=1 |
Activates data context.
|
| AT+QIDEACT=1 |
Deactivates data context.
|
| AT+QIACT? |
Displays active context information.
|
Network Mode & Band Selection
| Command |
Description
|
| AT+CFUN? |
Displays current functionality level.
|
| AT+CFUN=0 |
Enables minimum functionality and disables RF.
|
| AT+CFUN=1 |
Enables full functionality.
|
| AT+CFUN=4 |
Enables flight mode.
|
| AT+CFUN=1,1 |
Restarts the modem.
|
| AT+QNWPREFCFG="mode_pref" |
Configures preferred radio technology.
|
| AT+QNWPREFCFG="mode_pref",NR5G |
Forces 5G SA operation.
|
| AT+QNWPREFCFG="mode_pref",LTE |
Forces LTE operation.
|
| AT+QNWPREFCFG="mode_pref",LTE:NR5G |
Allows LTE and 5G operation.
|
| AT+QNWPREFCFG="policy_band" |
Configures allowed frequency bands.
|
| AT+QNWPREFCFG="srv_domain" |
Configures service domain preferences.
|
| AT+QNWPREFCFG="roam_pref" |
Configures roaming preferences.
|
SMS
| Command |
Description
|
| AT+CMGF=1 |
Sets SMS text mode.
|
| AT+CMGS="+37060000000" |
Sends an SMS message.
|
| AT+CMGL="ALL" |
Lists all stored SMS messages.
|
| AT+CMGR=1 |
Reads SMS at index 1.
|
| AT+CMGD=1 |
Deletes SMS at index 1.
|
| AT+CNMI=2,1,0,0,0 |
Enables SMS arrival notifications.
|
Serial / Interface
| Command |
Description
|
| AT+IPR? |
Queries UART baud rate.
|
| AT+IPR=115200 |
Sets UART baud rate.
|
| AT+IFC=2,2 |
Enables RTS/CTS hardware flow control.
|
| AT+CMUX=0 |
Enables GSM multiplexing.
|
| AT+QURCCFG="urcport","uart1" |
Routes URCs to UART1.
|
| AT+QCFG="usbnet" |
Queries USB networking mode.
|
| AT+QCFG="usbnet",0 |
Selects QMI/RmNet mode.
|
| AT+QCFG="usbnet",1 |
Selects ECM mode.
|
| AT+QCFG="usbnet",2 |
Selects MBIM mode.
|
| AT+QCFG="usbnet",3 |
Selects RNDIS mode.
|
| AT+QCFG="usbnet",5 |
Selects NCM mode.
|
Diagnostics & Debugging
| Command |
Description
|
| AT+CEER |
Displays the reason for the most recent registration or connection failure.
|
| AT+CGCONTRDP=1 |
Displays dynamic PDP information including IP and DNS settings.
|
| AT+QENG="servingcell" |
Displays detailed serving cell diagnostics.
|
| AT+QENG="neighbourcell" |
Displays neighboring cell diagnostics.
|
| AT+QNWINFO |
Displays current network technology, operator and band.
|
| AT+QCSQ |
Displays detailed signal quality information.
|
| AT+QCFG? |
Displays Quectel configuration parameters.
|
| AT+QINDCFG? |
Displays URC configuration settings.
|
| AT+CLAC |
Lists 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.
