Manual

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 3 2015-08-03
Contents
Version History.........................................................................................14
1 Introduction............................................................................................22
1.1 Scope of the document .......................................................................................22
1.2 Related documents..............................................................................................22
1.3 Conventions and abbreviations ..........................................................................22
1.4 AT Command syntax ..........................................................................................22
1.4.1 Basic syntax ...................................................................................................................23
1.4.2 S Parameter syntax.........................................................................................................23
1.4.3 Extended Syntax.............................................................................................................23
1.4.4 Combining AT commands on the same Command line.................................................23
1.4.5 Entering successive AT commands on separate lines.....................................................24
1.5 Supported character sets.....................................................................................24
1.6 Flow control .......................................................................................................24
1.6.1 Software flow control (XON/XOFF flow control).........................................................24
1.6.2 Hardware flow control (RTS/CTS flow control)............................................................25
1.7 Definitions ..........................................................................................................25
1.7.1 Parameter Saving Mode .................................................................................................25
1.7.2 Max Response Time.......................................................................................................26
2 AT Commands According to V.25TER ................................................27
2.1 Overview of AT Commands According to V.25TER .........................................27
2.2 Detailed Description of AT Commands According to V.25TER ........................28
2.2.1 A/ Re-issues the Last Command Given.......................................................................28
2.2.2 ATA Answer an Incoming Call....................................................................................28
2.2.3 ATD Mobile Originated Call to Dial A Number..........................................................29
2.2.4 ATD><n> Originate Call to Phone Number in Current Memory................................31
2.2.5 ATD><str> Originate Call to Phone Number in Memory Which Corresponds to
Field <str>...............................................................................................................................32
2.2.6 ATDL Redial Last Telephone Number Used...............................................................34
2.2.7 ATE Set Command Echo Mode ..................................................................................35
2.2.8 ATH Disconnect Existing Connection.........................................................................35
2.2.9 ATI Display Product Identification Information .........................................................35
2.2.10 ATL Set Monitor speaker loudness............................................................................36
2.2.11 ATM Set Monitor Speaker Mode ..............................................................................36
2.2.12 +++ Switch from Data Mode or PPP Online Mode to Command Mode ..................36
2.2.13 ATO Switch from Command Mode to Data Mode....................................................37
2.2.14 ATP Select Pulse Dialling..........................................................................................37
2.2.15 ATQ Set Result Code Presentation Mode..................................................................38
2.2.16 ATS0 Set Number of Rings before Automatically Answering the Call.....................38
2.2.17 ATS3 Set Command Line Termination Character .....................................................39