Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 175 12/24/2010
Response
+CIPQSEND: <n>
OK
Read Command
AT+CIPQSEND
?
Parameter
See Write Command
Response
OK
Write Command
AT+CIPQSEND
=<n>
Parameter
<n> 0 Normal mode – when the server receives TCP data, it will
responsd SEND OK.
1 Quick send mode – when the data is sent to module, it will
responsd DATA ACCEPT:<n>,<length>, while not responding
SEND OK.
Reference Note
8.2.5 AT+CIPACK Query Previous Connection Data Transmitting State
AT+CIPACK Query Previous Connection Data Transmitting State
Test Command
AT+CIPACK=?
Response
OK
Response
+CIPACK: <txlen>, <acklen>, <nacklen>
OK
Write Command
If in multi IP
connection
(+CIPMUX=1)
AT+CIPACK=<
n>
Parameters
<n> a numeric parameter which indicates the connection number
<txlen> the data amount which has been sent
<acklen> the data amount confirmed successfully by the server
<nacklen> the data amount without confirmation by the server
Response
+CIPACK: <txlen>, <acklen>, <nacklen>
OK
Execution
Command
If in single IP
connection
(+CIPMUX=0)
AT+CIPACK
Parameters
See Write Command
Reference Note