Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 174 12/24/2010
Parameters
<n> a numeric parameter which indicates the connection number
<length> a numeric parameter which indicates the length of sending
data, it must be less than <size>
Execution
Command
AT+CIPSEND
response">", then
type data for send,
tap CTRL+Z to
send, tap ESC to
cancel the
operation
Response
This Command is used to send changeable length data.
If single IP connection is established (+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
Note
This Command can only be used in single IP connection mode
(+CIPMUX=0) and to send data on the TCP or UDP connection that has
been established already. Ctrl-Z is used as a termination symbol. ESC is
used to cancel sending data. There are at most <size> bytes which can be
sent at a time.
Reference Note
z The data length which can be sent depends on network status.
z Set the time that send data automatically with the Command of
AT+CIPATS.
z Only send data at the status of established connection.
8.2.4 AT+CIPQSEND Select Data Transmitting Mode
AT+CIPQSEND Select Data Transmitting Mode
Response
+CIPQSEND: (0,1)
OK
Test Command
AT+CIPQSEND
=?
Parameter
See Write Command