My BG77 no longer receives AT commands after updating its FW

I updated my BG77 with the intention of being able to use its LwM2M functions, after updating its FW it no longer receives AT commands, I don’t know where the problem is.

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Hi @mjes27

which FW are you update to? and what’s the old FW version?

I don’t remember what the previous version of the fw is, but my current version is:

BG77LAR02A04_01.204.01.204

Could it be the version of the driver installed on my computer?

I think not related driver because it works on pervious version. And is there any outprint from MAIN uart when you reset module?
e.g
RDY

APP RDY.