What does it mean?
"Gateway just another sensor node! So now you can have wired ethernet sensors and wireless ESP8266 sensors without any radio attach if you want."

I have serial gateway with nfr radio, connected to PC with home assistant. How can I add ethernet node without radio to this setup? How it will be talk with gateway?

How often do you get the serial exception? - I get it when close hass.exe.
Now I have this found sensors:

{"14": {"sensor_id": 14, "sketch_name": "Aquarium", "type": 17, "sketch_version": "1.1", "children": {"0": {"id": 0, "values": {"2": "0", "3": "0"}, "type": 4}, "1": {"id": 1, "values": {"2": "0", "3": "0"}, "type": 4}, "2": {"id": 2, "values": {"2": "0", "3": "0"}, "type": 4}, "3": {"id": 3, "values": {"0": "29.0"}, "type": 6}}, "battery_level": 0}}

Thanks for your help, I updated HA to 0.17.3 and it began to work, but no sliders.

I send initial values in setup.

MyMessage temp_msg(TEMP_SENSOR_ID, V_TEMP);
MyMessage light_msg(0, V_PERCENTAGE);

void setup()  
{ 

  send(light_msg.setSensor(0).set(0));
  send(light_msg.setSensor(1).set(0));
  send(light_msg.setSensor(2).set(0));
 .....
}

Here log from MYSController

04.04.2016 21:26:35	INFO	Connected to COM5
04.04.2016 21:26:37	CHILD	New child discovered, node id=0, child id=internal
04.04.2016 21:26:37	RX	0;255;3;0;14;Gateway startup complete.
04.04.2016 21:26:44	UPDATE	281474976713968
04.04.2016 21:26:46	NODE	New node discovered, node id=14
04.04.2016 21:26:46	CHILD	New child discovered, node id=14, child id=3
04.04.2016 21:26:46	RX	14;3;1;0;0;29.5
04.04.2016 21:27:23	CHILD	New child discovered, node id=14, child id=0
04.04.2016 21:27:23	RX	14;0;1;0;3;0
04.04.2016 21:27:23	CHILD	New child discovered, node id=14, child id=1
04.04.2016 21:27:23	RX	14;1;1;0;3;0
04.04.2016 21:27:23	CHILD	New child discovered, node id=14, child id=2
04.04.2016 21:27:23	RX	14;2;1;0;3;0
04.04.2016 21:27:24	CHILD	New child discovered, node id=14, child id=internal
04.04.2016 21:27:24	DEBUG	Update child id=255, type=ARDUINO_NODE
04.04.2016 21:27:24	RX	14;255;0;0;17;2.0.0-beta
04.04.2016 21:27:24	TX	14;255;3;0;6;M
04.04.2016 21:27:24	RX	14;255;3;0;6;0
04.04.2016 21:27:24	DEBUG	Update child id=0, type=DIMMER
04.04.2016 21:27:24	RX	14;0;0;0;4;
04.04.2016 21:27:24	DEBUG	Update child id=1, type=DIMMER
04.04.2016 21:27:24	RX	14;1;0;0;4;
04.04.2016 21:27:24	DEBUG	Update child id=2, type=DIMMER
04.04.2016 21:27:24	RX	14;2;0;0;4;
04.04.2016 21:27:24	DEBUG	Update child id=3, type=TEMP
04.04.2016 21:27:24	RX	14;3;0;0;6;
04.04.2016 21:27:24	RX	14;255;3;0;11;Aquarium
04.04.2016 21:27:24	RX	14;255;3;0;12;1.1
04.04.2016 21:28:02	TX	14;2;1;0;3;56
04.04.2016 21:28:02	RX	14;2;1;0;3;56
04.04.2016 21:28:24	RX	14;3;1;0;0;29.5
04.04.2016 21:28:27	TX	14;2;1;0;3;0
04.04.2016 21:28:27	RX	14;2;1;0;3;0

Set optimistic: 'false', nothing changes. I can only turn OFF.

Serial exeption is permanent. Tried pyserial 2.7 and 3.0.1

If you send state feedback to controller after receiving an incoming value - YES
Also make sure you handle this in incoming message function. - I dont uderstand. What should I do with incoming messages in mysensors serial gateway?

Clear log and start HA:

16-04-04 16:05:40 homeassistant.components.recorder: Found unfinished sessions
16-04-04 16:06:15 mysensors.mysensors: child_id 0 already exists in children, cannot add child
16-04-04 16:06:15 mysensors.mysensors: child_id 1 already exists in children, cannot add child
16-04-04 16:06:15 mysensors.mysensors: child_id 2 already exists in children, cannot add child
16-04-04 16:06:15 mysensors.mysensors: child_id 3 already exists in children, cannot add child
16-04-04 16:06:53 homeassistant.components.http: API password missing or incorrect.
16-04-04 16:07:30 mysensors.mysensors: Serial exception
Traceback (most recent call last):
  File "C:\Users\bazis\AppData\Roaming\.homeassistant\lib\mysensors\mysensors.py", line 341, in run
    line = self.serial.readline()
  File "C:\Users\bazis\AppData\Roaming\.homeassistant\lib\serial\serialwin32.py", line 218, in read
    raise SerialException('call to ClearCommError failed')
serial.serialutil.SerialException: call to ClearCommError failed

found_sensors:

{"14": {"children": {"0": {"type": 4, "values": {"3": "0"}, "id": 0}, "1": {"type": 4, "values": {"3": "0"}, "id": 1}, "2": {"type": 4, "values": {"3": "0"}, "id": 2}, "3": {"type": 6, "values": {"0": "29.0"}, "id": 3}}, "type": 17, "sketch_version": "1.1", "battery_level": 0, "sensor_id": 14, "sketch_name": "Aquarium"}}

Config:

homeassistant:
  # Name of the location where Home Assistant is running
  name: Home
  # C for Celcius, F for Fahrenheit
  temperature_unit: C
  # Pick yours from here: http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
  time_zone: Europe/Moscow
   # Location required to calculate the time the sun rises and sets
  latitude: **********
  longitude: *********

# View all events in a logbook
logbook:

# Checks for available updates
updater:

# Enables the frontend
frontend:

# Show links to resources in log and frontend
#introduction:

# Discover some devices automatically
discovery:

# Enables support for tracking state changes over time.
history:

# Allows you to issue voice commands from the frontend
conversation:

# Track the sun
sun:

http:
  api_password: **********

device_tracker:
  platform: ddwrt
  host: 192.168.1.1
  username: *********
  password: **********
  #interval_seconds: 60


mysensors:
  gateways:
    - port: 'COM5'
      #persistence_file: "C:\\Users\\bazis\\AppData\\Roaming\\.homeassistant\\found_mysensors.json"
      persistence_file: "found_mysensors.json"
      baud_rate: 115200
  debug: true
  persistence: true
  version: '1.5'
  optimistic: 'true'

I will post some additional info later.

Great controller, but IMHO raw.
Add mysensors dimmer to HA 0.16.1. It appears in web interface, but no slider.

I can turn lights OFF, but not ON - sensor just dont recive any command. And HA set V_PERCENTAGE=0, instead of 100:

I use latest dev version of Mysensors. MYSController works fine with this sensor.