SIM808 GPRS connection issue

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aleshmahajan

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Hello,

I am using SIM808 in a project for a while and have this set of AT commands in use:

Code: 
AT
AT+CREG?
AT+CGATT?
AT+SAPBR=3,1,"Contype","GPRS"
AT+SAPBR=3,1,"APN","airtelgprs.com"
AT+SAPBR=1,1
AT+HTTPINIT

which worked fine until I started getting problem with AT+SAPBR=1,1 which replies with an OK but the netlight starts blinking (According to datasheet it represent GPRS data transmission in process).:-|
Tried:bang::

  1. reset
  2. upgrade the SIM808 firmware(with and without user memory erase)
  3. Changed the module itself
  4. verified with 3 different SIM cards(Airtel, Airtel, TATADOCOMO: networks in India)

Suggestion are welcomed. Thank You
 
Last edited by a moderator:

aleshmahajan said:
Hello,

netlight starts blinking (According to datasheet it represent GPRS data transmission in process).:-|
Click to expand...

Where in the manual does it say that?

This is normal and the LED is always blinking fast when GPRS is on(AT+SAPBR=1,..).
 

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