SimCom SIM900 Series Installation instructions

SIM900 NTP AT Command Manual_V1.00

Document Title: SIM900 NTPAT Command Manual
Version: 1.00
Date: 2013-09-22
Status: New
Document Control ID: SIM900 NTPAT Command Manual_V1.00
General Notes
SIMCom offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by SIMCom. The information provided is based
upon requirements specifically provided to SIMCom by the customers. SIMCom has not
undertaken any independent search for additional relevant information, including any information
that may be in the customer’s possession. Furthermore, system validation of this product designed
by SIMCom within a larger electronic system remains the responsibility of the customer or the
customer’s system integrator. All specifications supplied herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom
Limited., copying of this document and giving it to others and the using or communication of the
contents thereof, are forbidden without express authority. Offenders are liable to the payment of
damages. All rights reserved in the event of grant of a patent or the registration of a utility model
or design. All specification supplied herein are subject to change without notice at any time.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2013

SIM900 NTPAT Command Manual
SIM900_NTP AT Command Manual_V1.00 9/22/2013
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Version History
Version Chapter What is new
V1.00 Origin

SIM900 NTPAT Command Manual
SIM900_NTP AT Command Manual_V1.00 9/22/2013
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1Introduction
This document presents the AT command of NTP operation for SIM900. This document can apply
to the same series of the modules which contain NTP function, like SIM900, SIM900D, SIM900B
and SIM900A.
1.1 Features
1.2 Reference
[1] SIM900 AT Commands Set

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2AT commands
2.1 AT+CNTP
AT+CNTP Set NTP Parameters and Get Network Time
Test Command
AT+CNTP=?
Response
OK
Response
+CNTP: “<URL>”,<time zone>,<cid>,<mode>
OK
Read Command
AT+CNTP?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CNTP=<UR
L>[,<time
zone>][,<cid>][,<
mode>]
Parameter
<URL> A string parameter (string should be included in quotation marks)
which indicates the NTP Server address.
<time zone> (-12-12) A numeric parameter which indicates the network
time zone, default value is 8
<cid> Bearer profile identifier refer to AT+SAPBR
<mode>
0 synchronize the modem with network time
1 report network time
2 report network time and synchronize the modem
Response
OK
+CNTP: <result>[,<time>]
Execution
Command
AT+CNTP
Parameter
<result> Anumeric parameter which indicates the operation result:
1Success
61 Net error
62 Dns error
63 Connect error

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64 Timeout
65 Server error
66 Operation not allow
<time> String type(string should be included in quotation marks) value;
format is "yy/MM/dd,hh:mm:ss", where characters indicate year (two last
digits),month, day, hour, minutes, seconds .E.g. 6th of May 2010, 00:01:52
equals to "10/05/06,00:01:52"
Reference Note

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3Examples
SIM900 NTP module provides Network Time solution. The following is the examples for
application.
3.1 Activate bearer profile
AT+SAPBR=3,1,"Contype","GPRS" //Set bearer parameter
OK
AT+SAPBR=3,1,"APN","CMNET"
OK
AT+SAPBR=1,1 //
Activate bearer context
OK
AT+SAPBR=2,1
+SAPBR: 1,1,"10.89.193.1"
OK
3.2 Set NTP parameters and Get the network time
AT+CNTP="pool.ntp.org ",8,1,2
OK
AT+CNTP
+CNTP: 1,"13/04/18,14:38:30"
OK
3.3 Deactivate bearer profile
AT+SAPBR=0,1 // Deactivate bearer context
OK

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Contact us:
Shanghai SIMCom wireless solutions Ltd.
Address: Building A, SIM Technology Building, No. 633 Jinzhong Road, Shanghai,
P. R. China 200335
Tel: [phone]
Fax: [phone]
URL: www.sim.com/wm