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SIM900 AT Command Manual

SIM900_AT Command Manual_V1.03 173 12/24/2010

Parameters

See Write Command

Response

1) For single IP connection (+CIPMUX=0)

+CIPSEND:<size>

2) For multi IP connection (+CIPMUX=1)

+CIPSEND:<n><size>

Read Command

AT+CIPSEND?

Parameters

<n> a numeric parameter which indicates the connection number

<size> a numeric parameter which indicates the data length sent at a

time

Write Command

1) If single IP

connection

(+CIPMUX=0)

AT+CIPSEND=<

length>

2) If multi IP

connection

(+CIPMUX=1)

AT+CIPSEND=<

n>[,<length>]

Response

This Command is used to send changeable length data

If single IP is connected (+CIPMUX=0)

If connection is not established or module is disconnected:

If error is related to ME functionality:

+CME ERROR <err>

If sending is successful:

When +CIPQSEND=0

SEND OK

When +CIPQSEND=1

DATA ACCEPT:<length>

If sending fails:

SEND FAIL

If multi IP connection is established (+CIPMUX=1)

If connection is not established or module is disconnected:

If error is related to ME functionality:

+CME ERROR <err>

If sending is successful:

When +CIPQSEND=0

<n>,SEND OK

When +CIPQSEND=1

DATA ACCEPT:<n>,<length>

If sending fails:

<n>,SEND FAIL

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