SimCom SIM900 Series Instructions d'installation

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.

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

or design. All specification supplied herein are subject to change without notice at any time.

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

Version History

Version Chapter What is new

V1.00 Origin

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

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

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

2AT commands

2.1 AT+CNTP

AT+CNTP Set NTP Parameters and Get Network Time

Test Command

AT+CNTP=?

Response

+CNTP: “<URL>”,<time zone>,<cid>,<mode>

Read Command

AT+CNTP?

Parameter

See Write Command

Response

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

+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

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

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

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

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

AT+SAPBR=3,1,"APN","CMNET"

AT+SAPBR=1,1 //

Activate bearer context

AT+SAPBR=2,1

+SAPBR: 1,1,"10.89.193.1"

3.2 Set NTP parameters and Get the network time

AT+CNTP="pool.ntp.org ",8,1,2

AT+CNTP

+CNTP: 1,"13/04/18,14:38:30"

3.3 Deactivate bearer profile

AT+SAPBR=0,1 // Deactivate bearer context

SIM900 NTPAT Command Manual

SIM900_NTP AT Command Manual_V1.00 9/22/2013

Shanghai SIMCom wireless solutions Ltd.

Address: Building A, SIM Technology Building, No. 633 Jinzhong Road, Shanghai,

P. R. China 200335

Tel: +86 21 3252 3300

Fax: +86 21 3252 3020

URL: www.sim.com/wm

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