Domoticz

my situation:

I have a lot of questions and I need some advice to go futher. The questions are marked with a Q and number for easy replying.
I have bought a few sensors, nano's and the esp07s are coming.
all the nano's and sensors Have I tested with the example sketches and they are working stable in my domoticz.
but I'm not sure of my ideas are possible and if this is the best way to accomplish my goals.
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cupboard:

USB nano3 gateway with big antenna on my PI that is working fine.

The gateway is 50 cm from my water meter and controller but a gateway can not ack as a sensor.
Q1: is this true are there no options to have 1 device for multiple goals? a esp/mysensor gateway or something?
That's a shame because I want to replace my working PI with Piface that is connected to:
a pulse meter for water
a switch to my buva remote controller

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carport:

I have a carport with an electric garagedoor.
a few goals:
1: control (up/down/stop)
2: check (what is the current position?)
3: parking sensor. So I know if I drive far enough so i can close the door.

1: relay
1 click on my remote is open another is stop and another is close.

q2: I have an extra wireless remotecontroller, and a wired on and spare inputs on my Ecostar motor (hörnbach version of hormann)
There are advantages to a certain way?
Q3: - but when the door if fully opened it skips the stop function.
Is this stable enough when it misses a switch or something?
Q4: - when the sensor crashes of had no power the door must not change. I have metered the relay on my mysensors and when I power off the sensor it's always open.
Q5: - Only the gateway must open the door. what kind of security is possible? so that not everyone with an NRF24L01+ something can open my door.

2: distance meter1
this measures where the door is in the rail. when distance is 250 the door is fully closed
when lower then 250 for example 150 the door is opened a meter.

3: distance meter2
continue measurement when door status changed to open.
(then I drive inside, so It must be measuring and controlling the led for a minute)
when distance is less then 100cm the red LED is ON
4: led

I don't need this information sended to my gateway.

Q6: is this possible on 1 nano 3? or can I better choose for esp07 ?
Q7: wireless in my carport is very poor, But I don't know if NRF24L01+ is better. but they can repeat.
Q8: Would the combination of the different sketches to big and complex for the nano?

extra info and examples for myself.
http://www.mysensors.org/build/parking
http://www.mysensors.org/build/distance
http://forum.mysensors.org/topic/1200/g ... er-checker
http://www.mysensors.org/build/relay

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attic already working fine.
temp-hum and motion sensor.

only thing to do is (low prio):
power usage from washing wasmachine
and temperature of water to the douche from boiler.
enable repeater mode
and update mysensor version

Loads of questions, cant help you too much and you probably already found a few answers on mysensor.org but from experience:
Nano's are easy to program, as well as they have 5v available. So use them.
It.s probably easier to use a couple of diferent nano's but you can combine sketches
If you need longer range, then just get the radio with aerial, range is 1km acording to the my sensor website

Parking sensor works great, just made it this weekend, im about to solder it together, but still need to see why it doesn't get picked up by domoticz...

Did you get that distance sensor working? I can see mine in hardware, but no device is added