I upgraded .54 AIO on Raspian AIO to .55.
pi@raspberrypi:~ $ sudo systemctl status home-assistant.service
● home-assistant.service - Home Assistant
Loaded: loaded (/etc/systemd/system/home-assistant.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2017-10-09 00:54:52 UTC; 5min ago
Main PID: 524 (hass)
CGroup: /system.slice/home-assistant.service
├─ 524 /srv/homeassistant/homeassistant_venv/bin/python3 /srv/homeassistant/homeassistant_venv/bin/hass -c /home/homeassistant/.homeassistant
├─ 892 /srv/homeassistant/homeassistant_venv/bin/python3 -m pip install --quiet python_openzwave==0.4.0.35 --upgrade --constraint /srv/homeassistant/homeassistant_venv/lib/python
├─1018 /srv/homeassistant/homeassistant_venv/bin/python3 -u -c import setuptools, tokenize;__file__='/tmp/pip-build-mpm0e6y8/python-openzwave/setup.py';f=getattr(tokenize, 'open'
├─1046 make
├─1064 /bin/sh -c LDFLAGS="" CPPFLAGS="" make -C /tmp/pip-build-mpm0e6y8/python-openzwave/openzwave-embed/open-zwave-master/cpp/build/ -
├─1065 make -C /tmp/pip-build-mpm0e6y8/python-openzwave/openzwave-embed/open-zwave-master/cpp/build/ -
├─2279 /bin/sh -c g++ -c -Wall -Wno-unknown-pragmas -Werror -Wno-format -Wno-error=sequence-point -Wno-sequence-point -O3 -DNDEBUG -fPIC -DSYSCONFDIR="\"/usr/local/etc/openzwave
├─2280 g++ -c -Wall -Wno-unknown-pragmas -Werror -Wno-format -Wno-error=sequence-point -Wno-sequence-point -O3 -DNDEBUG -fPIC -DSYSCONFDIR="/usr/local/etc/openzwave/" -I /tmp/pip
└─2281 /usr/lib/gcc/arm-linux-gnueabihf/6/cc1plus -quiet -I /tmp/pip-build-mpm0e6y8/python-openzwave/openzwave-embed/open-zwave-master/cpp/src -I /tmp/pip-build-mpm0e6y8/python-o
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: new_state=<state group.all_automations=off; order=0,
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_executed[L]: service_call_id=1971707312-1>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_registered[L]: service=trigger, domain=automation>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_registered[L]: service=reload, domain=automation>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_registered[L]: service=toggle, domain=automation>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_registered[L]: service=turn_on, domain=automation>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_registered[L]: service=turn_off, domain=automation>
Oct 09 00:55:16 raspberrypi hass[524]: 2017-10-09 00:55:16 INFO (MainThread) [homeassistant.setup] Setup of domain automation took 0.7 seconds.