Well I have used the Lora E5 mini board in serial mode without problems ! Have you properly setup the UART port on your MCU ? (speed, baud, parity) ? Have you tried also te reverse pins as TX/RX is always a joke for UART
Did you have to change the existing software on the LoRa E5 mini as it worked out of the box?
I have connected from my usart on base nucleo board, the TX to RX2 and Rx to Tx2 on the Lora E5 mini.
As the heading says It implies that you can connect to usart on the lora e5 mini and communicate using AT commands. The board is not responding to my AT Commands
If it’s in original conditions and you have flashed nothing in it it should work with AT commands out of box ! Once flashed with a new firmware you are gone with AT commands (Seeed doesn’t supply the original firmware for reflash
wrong the serial port you want to use is the one that is linked at USB interface so TX/RX ! and also try both RX on TX and RX on RX to be sure !
Did you try as stated in seeed documentation to connect the mini board at your pc in usb C and tries to send AT commands at it ? This way you’ll be sure the board works properly