Hi Dralora,
Are you using the same setup as me?
If yes, have you configured the pins correctly? As stated here (Can we use Voltage translator IC on UMTS<E EVB to step down voltage from 3.3 to 1.8 V for communication between external MCU(nrf52) and BG95 Module?)
Have you removed these two resistors(https://forums.quectel.com/uploads/default/original/2X/2/23f15e08532f853e216ae1a19e53a3fc3bf6d8d5.jpeg)?
Given your setup is identical to mine, it worked with simple uart_send and then waiting for response with uart_recv - there wasn’t anything special about the code, the time consuming factor was the hardware configuration which took a while to be sorted out.
Let if know if it worked,
Regards,