Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 168 23.06.2010
8 AT Commands for TCPIP Application Toolkit
8.1 Overview
Command Description
AT+CIPMUX START UP MULTI IP CONNECTION
AT+CIPSTART START UP TCP OR UDP CONNECTION
AT+CIPSEND SEND DATA THROUGH TCP OR UDP CONNECTION
AT+CIPQSEND SELECT DATA TRANSMITTING MODE
AT+CIPACK QUERY PREVIOUS CONNECTION DATA TRANSMITTING STATE
AT+ CI PCL OS E CLOSE TCP OR UDP CONNECTION
AT+CIPSHUT DEACTIVATE GPRS PDP CONTEXT
AT+CLPORT SET LOCAL PORT
AT+CSTT START TASK AND SET APN, USER NAME, PASSWORD
AT+CIICR BRING UP WIRELESS CONNECTION WITH GPRS OR CSD
AT+CIFSR GET LOCAL IP ADDRESS
AT+ CI PSTAT US QUERY CURRENT CONNECTION STATUS
AT+CDNSCFG CONFIGURE DOMAIN NAME SERVER
AT+CDNSGIP QUERY THE IP ADDRESS OF GIVEN DOMAIN NAME
AT+ CI PHE AD ADD AN IP HEAD WHEN RECEIVING DATA
AT+ CI PAT S SET AUTO SENDING TIMER
AT+CIPSPRT SET PROMPT OF ‘>’ WHEN SENDING DATA
AT+CIPSERVER CONFIGURE AS SERVER
AT+ CI PCS GP SET CSD OR GPRS FOR CONNECTION MODE
AT+CIPSRIP SET BOTH DISPLAY IP ADDRESS AND PORT OF SENDER WHEN
RECEIVE DATA
AT+CIPMODE SELECT TCPIP APPLICATION MODE
AT+ CI PDP DP SET WHETHER CHECK STATE OF GPRS NETWORK TIMING
AT+CIPCCFG CONFIGURE TRANSPARENT TRANSFER MODE
AT+CIPSHOWTP DISPLAY TRANSFER PROTOCOL IN IP HEAD WHEN RECEIVING
DATA
AT+CIPUDPMO
DE
UDP EXTENDED MODE
8.2 Detailed Descriptions of Commands
8.2.1 AT+CIPMUX Start Up Multi-IP Connection
AT+CIPMUX Start Up Multi-IP Connection
Test Command
AT+CIPMUX=?
Response
+CIPMUX: (0,1)