Access to your target board through serial connection. You'll get available
commands by hit `help` on the shell prompt.
```shell
> help
Available commands:
'> help': Shows this help
'> ip-addr': Shows all IPv6 addresses
'> ip-nbr': Shows all IPv6 neighbors
'> log module level': Sets log level (0--4) for a given module (or "all"). For module "mac", level 4 also enables per-slot logg'> ping addr': Pings the IPv6 address 'addr'
'> rpl-set-root 0/1 [prefix]': Sets node as root (on) or not (off). A /64 prefix can be optionally specified.
'> rpl-status': Shows a summary of the current RPL state
'> rpl-global-repair': Triggers a RPL global repair
'> rpl-local-repair': Triggers a RPL local repair
'> routes': Shows the route entries
'> tsch-schedule': Shows the current TSCH schedule
'> tsch-status': Shows a summary of the current TSCH state
'> reboot': Reboot the board by watchdog_reboot()
'> 6top help': Shows 6top command usage
```
Your board runs as a 6TiSCH node by default. Its role can be changed to DAG root