MU509 3G Module SIM problem
 

Hi All,

We are using the Huawei MU509 3G Module in the AM335x TI processor.
When we turn ON the 3G Module it is working fine and USB core driver understand the device as a
USB device.

We can able to send and receive the AT commands via USB and UART. But we cant access the
SIM interface.Please see the following response


AT
OK
ATZ
OK
AT+CPIN?
+CME ERROR: SIM failure

please help me to solve this problem.

Regards
Balaji

Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate.