Sim900 not getting "rdy"

[tkurowski]

Hi
I don't know what happened. I used to use mysim900 normally. I left it for a while and started playing with it again recently.
I receive the startup sequence 00 bla bla bla bla xFF xFF xFF xFF

But I never receive the "ok" or "rdy"
So I can't do anything with the module!

Help! Any ideas to what could be wrong?

 

[rajudp]

try send AT followed by 0x0D 0x0A

 

[Echo wang]

Hi
I don't know what happened. I used to use mysim900 normally. I left it for a while and started playing with it again recently.
I receive the startup sequence 00 bla bla bla bla xFF xFF xFF xFF

But I never receive the "ok" or "rdy"
So I can't do anything with the module!

Help! Any ideas to what could be wrong?

Hi, Pls kindy fix the module's baud rate to AUTO baud rate.

 

[rajudp]

some modules don't have any setting other than AT commands to set baud rate, while initializing with 'AT' followed by 0xD 0xA it will adjust with the baud rate

 

[Echo wang]

send "AT" for synchronizing baud rate，and then you can fix the baud rate by "AT+IPR"