====== System logs ======
There are several system diagnostic logs which sometimes may be needed to commision your system and find a potential cause of problems. 

===== System logs available in the project interface =====
{{ network:webhmi_logs.png?direct&600 |}}

==== WebHMI log ====

This log is also called communication log, because the most of the information there relates to communication process with the external devices. 

<code>
 Jul 22 13:38:45.637: ERROR: UART: Unable to open port /dev/ttyUSB3, No such file or directory
 Jul 22 13:38:45.638: ERROR: UART: Unable to open port /dev/ttyUSB3, No such file or directory
 Jul 22 13:38:45.719: ERROR: Enabled connection #3 (it was previously disabled due to read errors)
 Jul 22 13:38:45.720: ERROR: Enabled connection #5 (it was previously disabled due to read errors)
</code>

==== Kernel messages ====

This log helps to find hardware issues, e.g. error of the filesystem, storage drive etc.

<code>
[   22.900000] EXT4-fs (sda1): recovery complete
[   22.910000] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: 
[   28.450000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   28.450000] device eth0 entered promiscuous mode
[   28.470000] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
</code>
==== Level2 log ====
Pass the information from this log to the seller's support team to clarify the problem.
<code>
Jul 20 01:06:51.200: ERROR: Regs RealTime: Can't connect to server. Error #7: Error
Jul 20 01:07:03.350: ERROR: Regs RealTime: Can't connect to server. Error #7: Error
Jul 20 02:33:11.275: ERROR: Regs RealTime: Can't send data. Error code: 500
Jul 20 03:06:01.364: ERROR: Regs RealTime: Can't send data. Error code: 500
Jul 20 05:06:51.282: ERROR: Regs RealTime: Can't send data. Error code: 500
Jul 20 05:15:08.066: ERROR: UpdateLastTimeStamp: Can't update cloud_timestamps database! SQL Error #0: database is locked
Jul 20 06:25:17.551: ERROR: Regs RealTime: Can't send data. Error code: 500
Jul 20 07:28:07.546: ERROR: Regs RealTime: Can't send data. Error code: 500
</code>