Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 94 / 231
1. To prevent the +++ escape sequence from being misinterpreted as data, the following sequence
should be followed:
 Do not input any character within 1s before inputting +++.
 Input +++ within 1s, and no other characters can be inputted during the time.
 Do not input any character within 1s after +++ has been inputted.
 Switch to command mode successfully; otherwise return to Step 1.
2. To return back to data mode from command mode, please enter ATO.
3. Another way to change to command mode is through DTR level change, and please refer to AT&D
command for details.
7.7. ATO Switch from Command Mode to Data Mode
The command resumes the connection and switches back from command mode to data mode.
connection.
OK
Maximum Response Time
300ms
Reference
V.25ter
ATO Switch from Command Mode to Data Mode
Execution Command
ATO[n]
Response
TA resumes the connection and switches back to data mode
from command mode.
If connection is not successfully resumed:
NO CARRIER
If connection is successfully resumed, TA returns to data
mode from command mode
CONNECT <text>
Maximum Response Time
300ms
Reference
V.25ter
NOTES

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