HTCC-AC0X stop working (bootloader?)

After normal operation for a couple days the capsule stop to report data.
I connect to the computer and with serial monitor and after press reset button I only get one line message.
Copyrigth @ 2019 heltec Automation. All rights reserved.
No more.
If I press button again I get same message.

I upload the scketch again, upload find but after upload I get same message.

I attach screen shoot.

Hi,
For better low power consumption, when RX pin is low, the CubeCell does not open the serial port.
You can try to modify the following code as " if(1)"(CubeCell manager V1.0), and then see if there is more information printing on the serial port.

Hello friend, thanks but you miss tell me in what file I have to make that change?

sorry.The file path is “…\cores\asr650x\Serial\HardwareSerial.cpp” in your CubeCell development path.