Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 145 / 231
Parameter
<uid> Message identification in the user data header (UDH). Range: 0-65535 (see NOTES).
All segments of a same concatenated message have same <uid>. Different
concatenated messages should have different <uid>.
<msg_seg> Sequence number of a concatenated message. Range: 1-7.
<msg_total> The total number of the segments of one concatenated message. Range: 2-7.
Other parameters please refer to AT+CMGR
1. The <uid> in AT+QCMGR is different from the <uid> in AT+QCMGS. It is possible that UE receives
concatenated messages with 8-bit or 16-bit <uid>. So its maximal value is 255 with 8-bit and 65535
with 16-bit.
2. If the message to be read is not a concatenated message, <uid>, <msg_seg> and <msg_total>
would not be shown in the result.
Example
+CMTI: "SM",3 //The first message of a concatenated message comes
+CMTI: "SM",4 //The second message of a concatenated message comes
AT+QCMGR= 3 //Read the first segment of the concatenated message
+QCMGR: "REC UNREAD","+8615056913384",,"13/07/30,14:44:37+32",120,1,2
ABCD
OK
AT+QCMGR= 4 //Read the second segment of the concatenated message
+QCMGR: "REC UNREAD","+8615056913384",,"13/07/30,14:44:37+32",120,2,2
EFGH
OK
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