Suddenly my MySensors network has crashed 
My setup:
MySensors v2.0
Raspberry PI 2 (OS: OSMC/debian jessie, controller: Domoticz)
10 Nodes
Serial gateway (arduino nano)
A few days ago my MySensors networkk stopped responding, i dont realy know where to start troubleshooting and if its possible to see any Gateway logs on my RPi?
I can see some errors on the RPi:
[ 5.529590] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory.
[ 5.529857] systemd[1]: Found ordering cycle on basic.target/start
[ 5.529880] systemd[1]: Found dependency on sysinit.target/start
[ 5.529901] systemd[1]: Found dependency on apparmor.service/start
[ 5.529920] systemd[1]: Found dependency on remote-fs.target/start
[ 5.529937] systemd[1]: Found dependency on remote-fs-pre.target/start
[ 5.529953] systemd[1]: Found dependency on connman.service/start
[ 5.529970] systemd[1]: Found dependency on dbus.service/start
[ 5.529987] systemd[1]: Found dependency on basic.target/start
[ 5.530006] systemd[1]: Breaking ordering cycle by deleting job apparmor.service/start
[ 5.530027] systemd[1]: Job apparmor.service/start deleted to break ordering cycle starting with basic.target/start
[ 5.530323] systemd[1]: Found ordering cycle on basic.target/start
[ 5.530345] systemd[1]: Found dependency on sysinit.target/start
[ 5.530364] systemd[1]: Found dependency on kbd.service/start
[ 5.530382] systemd[1]: Found dependency on remote-fs.target/start
[ 5.530399] systemd[1]: Found dependency on remote-fs-pre.target/start
[ 5.530416] systemd[1]: Found dependency on connman.service/start
[ 5.530432] systemd[1]: Found dependency on dbus.service/start
[ 5.530449] systemd[1]: Found dependency on basic.target/start
[ 5.530466] systemd[1]: Breaking ordering cycle by deleting job kbd.service/start
[ 5.530485] systemd[1]: Job kbd.service/start deleted to break ordering cycle starting with basic.target/start
[ 5.530599] systemd[1]: Found ordering cycle on basic.target/start
[ 5.530618] systemd[1]: Found dependency on sysinit.target/start
[ 5.530636] systemd[1]: Found dependency on rpcbind.service/start
[ 5.530655] systemd[1]: Found dependency on network-online.target/start
[ 5.530672] systemd[1]: Found dependency on network.target/start
[ 5.530688] systemd[1]: Found dependency on connman.service/start
[ 5.530705] systemd[1]: Found dependency on dbus.service/start
[ 5.530721] systemd[1]: Found dependency on basic.target/start
[ 5.530738] systemd[1]: Breaking ordering cycle by deleting job rpcbind.service/start
[ 5.530758] systemd[1]: Job rpcbind.service/start deleted to break ordering cycle starting with basic.target/start
[ 5.679174] fuse init (API version 7.23)
[ 5.701175] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 5.728290] i2c /dev entries driver
[ 5.733286] bcm2708_i2c 3f804000.i2c: BSC1 Controller at 0x3f804000 (irq 83) (baudrate 100000)
[ 5.738096] systemd[1]: systemd-modules-load.service: main process exited, code=exited, status=1/FAILURE
[ 5.740561] systemd[1]: Failed to start Load Kernel Modules.
[ 5.740793] systemd[1]: Unit systemd-modules-load.service entered failed state.
[ 6.070440] systemd-udevd[198]: starting version 215
[ 6.298370] bcm2835-wdt 3f100000.watchdog: Broadcom BCM2835 watchdog timer
[ 6.330031] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[ 6.499883] usbcore: registered new interface driver usbserial
[ 6.499996] usbcore: registered new interface driver usbserial_generic
[ 6.500115] usbserial: USB Serial support registered for generic
[ 6.502689] usbcore: registered new interface driver ch341
[ 6.502800] usbserial: USB Serial support registered for ch341-uart
[ 6.502946] ch341 1-1.3:1.0: ch341-uart converter detected
[ 6.506979] usb 1-1.3: ch341-uart converter now attached to ttyUSB0
[ 6.507114] ch341 1-1.4:1.0: ch341-uart converter detected
[ 6.511244] usb 1-1.4: ch341-uart converter now attached to ttyUSB1
[ 6.779200] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 7.871057] systemd-journald[193]: Received request to flush runtime journal from PID 1
[ 8.649890] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[ 8.650159] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 10.109285] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 10.110614] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
[ 10.140762] 8021q: 802.1Q VLAN Support v1.8
[ 10.259892] random: nonblocking pool is initialized
[ 13.031131] smsc95xx 1-1.1:1.0 eth0: link down
[ 14.519466] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
[ 15.618347] Console: switching to colour dummy device 80x30
[97628.494454] Console: switching to colour frame buffer device 240x67
[97630.022871] Console: switching to colour dummy device 80x30
[592849.839421] ch341-uart ttyUSB0: usb_serial_generic_read_bulk_callback - urb stopped: -32
[592849.839542] ch341-uart ttyUSB0: usb_serial_generic_read_bulk_callback - urb stopped: -32
[592849.839621] ch341-uart ttyUSB0: usb_serial_generic_write_bulk_callback - urb stopped: -32
[592850.032947] usb 1-1.3: USB disconnect, device number 5
[592850.034342] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
[592850.034534] ch341 1-1.3:1.0: device disconnected
[592853.089143] usb 1-1.3: new full-speed USB device number 7 using dwc_otg
[592853.192492] usb 1-1.3: New USB device found, idVendor=1a86, idProduct=7523
[592853.192531] usb 1-1.3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[592853.192551] usb 1-1.3: Product: USB2.0-Serial
[592853.194402] ch341 1-1.3:1.0: ch341-uart converter detected
[592853.199751] usb 1-1.3: ch341-uart converter now attached to ttyUSB0
[592857.035394] ch341-uart ttyUSB1: usb_serial_generic_read_bulk_callback - urb stopped: -32
[592857.035569] ch341-uart ttyUSB1: usb_serial_generic_read_bulk_callback - urb stopped: -32
[592857.201899] usb 1-1.4: USB disconnect, device number 6
[592857.203137] ch341-uart ttyUSB1: ch341-uart converter now disconnected from ttyUSB1
[592857.203218] ch341 1-1.4:1.0: device disconnected
[592857.439203] usb 1-1.4: new full-speed USB device number 8 using dwc_otg
[592857.542421] usb 1-1.4: New USB device found, idVendor=1a86, idProduct=7523
[592857.542448] usb 1-1.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[592857.542462] usb 1-1.4: Product: USB2.0-Serial
[592857.543776] ch341 1-1.4:1.0: ch341-uart converter detected
[592857.547777] usb 1-1.4: ch341-uart converter now attached to ttyUSB1
[592861.554465] usb 1-1.4: USB disconnect, device number 8
[592861.555543] ch341-uart ttyUSB1: ch341-uart converter now disconnected from ttyUSB1
[592861.555680] ch341 1-1.4:1.0: device disconnected
[592864.089163] usb 1-1.4: new full-speed USB device number 9 using dwc_otg
[592864.192309] usb 1-1.4: New USB device found, idVendor=1a86, idProduct=7523
[592864.192338] usb 1-1.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[592864.192350] usb 1-1.4: Product: USB2.0-Serial
[592864.193674] ch341 1-1.4:1.0: ch341-uart converter detected
[592864.198088] usb 1-1.4: ch341-uart converter now attached to ttyUSB1