AT Command not responding

Hi all i recently Buy quectel ec25 E i powered it with 3.31v and it gives vdd as 1.8v actually working but when i connect it with microcontroller there is no output for AT commands

If the module is not connected to the microcontroller through the main serial port, check whether the AT command and Rx output are normal by your test.At the same time, check the circuit between module and MCU by referring to the manual.
Quectel_EC25_Reference_Design_Rev.G_20180209.pdf (554.5 KB)