Data Sheet

GPRS Module iteadstudio.com 2011-12-06
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Installation
Power on GPRS module
User can power on the GPRS module by pulling down the PWR button or the P
pin of control interface for at least 1 second and release. This pin is already
pulled up to 3V in the module internal, so external pull up is not necessary.
When power on procedure is completed, GPRS module will send following URC
to indicate that the module is ready to operate at fixed baud rate.
Indicator LED and Buttons:
NETSTATUS: The status of the NETSTATUS LED is listed in following table:
Status
Description
Off
SIM900 is not running
64ms On/800ms
Off
SIM900 not registered the network
64ms On/3000ms
Off
SIM900 registered to the network
64ms On/300ms
Off
GPRS communication is established
STATUS: Power status of SIM900.
PWR: Power status of GPRS module.
PWR: After the GPRS module power on, you need to press the POWER button
for a moment to power on the SIM900 module.
RESET: Reset the SIM900 module.
Revision History
Rev.
Description
Release date
v1.0
Initial version
2011-12-06