LTE Line Monitor UART is Red and Yellow blinking

[Zimin]

nRF Connect v3.2.0 - LTE Link Monitor is running on Ubuntu 16.04, and nrf9160 fw is v1.0.1. When connecting the board to my laptop, all Modem, UICC, LTE, PDN are Green. But, UART is in Red and Yellow blinking. Also, I failed to upgrade modem firmware via nRF Connect v3.2.0 - Programmer. On Windows, it works fine.

[Sigurd]

Hi,

We are investigating some compatibility issues with the modem flashing in Ubuntu 16. Ubuntu 18 should work fine. The red/yellow UART blinking is just the UART CTS/DSR signaling in linux CDC ACM.

[PopradiArpad]

HI,

I have similar problem on Ubuntu 20.04. UART is yellow and red blinking, PDN is grey, other connections are red.

I use 

images_dfu_hex/nrf9160dk_at_client_dfu_2020-04-29_bc7ade8b.hex

mfwnrf9160120.zip

From the log:

App pc-nrfconnect-linkmonitor v1.1.1 official
nRFConnect 3.4.0 is supported by the app (^3.2.0)

2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS1
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS10
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS11
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS12
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS13
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS14
2020-06-15T14:36:19.041Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS15
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS16
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS17
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS18
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS19
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS2
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS20
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS21
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS22
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS23
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS24
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS25
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS26
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS27
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS28
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS29
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS3
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS30
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS31
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS4
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS5
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS6
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS7
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS8
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS9
2020-06-15T14:36:19.042Z VERBOSE Could not fetch serial number for serial port at /dev/ttyS0
2020-06-15T14:36:26.322Z INFO Modem port is opened
2020-06-15T14:36:26.325Z DEBUG modem >> AT+CFUN?\x0D\x0A
2020-06-15T14:36:48.116Z INFO Modem port is opened
2020-06-15T14:36:48.124Z DEBUG modem >> AT+CFUN?\x0D\x0A
2020-06-15T14:38:19.534Z DEBUG modem >> AT+CFUN?\x0D\x0A
2020-06-15T14:38:20.535Z ERROR Error: 'AT+CFUN?
' timed out

What can be the problem?

Best regards,

Árpád

[PopradiArpad]

Wrong application hex, it should be

images_full/nrf9160dk_at_client_2020-04-29_bc7ade8b.hex

[Sigurd]

Hi PopradiArpad,

Please create a new case for your issue: https://devzone.nordicsemi.com/support/add

[PopradiArpad]

Hi Sigurd,

the problem is solved, the wrong hex caused the problem.

Best regards,

Árpád