Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 79 / 231
Example
AT+CSQ=?
+CSQ: (0-31,99),(0-7,99)
OK
AT+CSQ
+CSQ: 28,99 //The current signal strength indication is 28 and channel bit error rate is 99
OK
After using network related commands such as AT+CCWA and AT+CCFC, users are advised to wait for
3s before entering AT+CSQ. This is recommended to ensure that any network access required for the
preceding command has been finished.
6.4. AT+CPOL Preferred Operator List
The command edits and queries the list of preferred operators.
AT+CPOL Preferred Operator List
Test Command
AT+CPOL=?
Response
+CPOL: (list of supported <index>s),(list of supported
<format>s)
OK
Read Command
AT+CPOL?
Response
Query the list of preferred operators:
+CPOL:
<index>,<format>,<oper>[,<GSM>,<GSM_compact,<UTR
AN>,<E-UTRAN>]
<index>,<format>,<oper>[,<GSM>,<GSM_compact,<UTR
AN>,<E-UTRAN>]
[…]
OK
Write Command
AT+CPOL=<index>[,<format>[,<oper>
[<GSM>,<GSM_compact>,<UTRAN>,
<E-UTRAN>]]]
Response
Edit the list of preferred operators:
OK
ERROR
NOTE

Quectel EC25 Specifications

General

Category	LTE Module
LTE TDD	B38/B40/B41
WCDMA	B1/B5/B8
GSM	850/900/1800/1900 MHz
Data rates	LTE Cat 4: 150 Mbps DL/50 Mbps UL
GNSS	GPS/GLONASS/BeiDou/Galileo/QZSS
Operating Temperature	-40°C to +85°C
Form Factor	LCC
Storage Temperature	-45°C to +90°C
SIM Interface	1.8V/3.0V
Antenna Interface	Main, Diversity, GNSS
LTE FDD	B1/B3/B5/B7/B8/B20
Interfaces	USB 2.0, UART, PCM, GPIO
Operating Voltage	3.3V - 4.3V
Protocols	TCP/IP, UDP, FTP, HTTP, HTTPS
Certifications	CE, FCC, PTCRB, GCF, RCM, IC