HL8548-G : Unable to communicate after startup

IoT Modules Legacy HL Series
1

Hi,

I start some tests on a custom board with a HL8548-G module interfaced with a STM32 through 2 pins UART. At startup, I get the initial message :

+SIM: 1

+KSUP: 0

+GPSEVINIT: 1

After this, every command (or everything else) I send to the device is echoed (verified with an scope on the board) :

ATI3
ATI3

TITITATA
TITITATA

Thanks for your help

2

Hi,
which FW are you using?? also is it working fine stand alone?? means without connecting STM32???

-Alex