low-power arduino + radio module for outdoor project.

Other Hardware Home Automation
1

Hello.

Need some help to choose equipment for project in which I need measure temperature from several thermo-sensors (like DS18B20).
There is a big difficulty - sensors are located outdoor, mostly covered in snow and most time without human access, so all measurement data have to be sent via radio (or wifi ?) to receiver.
I need get data twice a day. All the rest time device can be in sleep mode - for low power consumption.
Receiver (person with receiving device) can go to a distance of 100 meters to the device and from this location he have be able to measure all the sensors and to obtain the data on the smartphone.
So seems I need two devices:

  1. transceiver with ability read several (8-15) thermo sensors, send data, and sleep for a while.
    Also I need battery for this transceiver which allows it to work for 3-4 months in winter conditions.

  2. receiver that can receive data from transceiver and put it to simple web server on openwrt device (like tp-link mr3020) via usb(?).
    And then via WiFi AP from this mr3020 I can get all data on smartphone.

The main problem to me is choosing the right controller with radio module.
I've been searching a lot, and so far I think that the best variant will be Moteino device

https://lowpowerlab.com/shop/moteinomega

Moteino MEGA on chip RFM69HW/RFM69W
there is a good thread
http://forum.arduino.cc/index.php?topic=225430.0
which describes the differences between, but I don't know what better for me - more powerful HW or more better in battery consumption W version.

or it would be better to use Moteino MEGA LoRa on chip RFM95 (but more expensive).

I just need to make sure that I can connect to this microcontroller my 8-15 DS18B20 and, which more important, that I can power this microcontroller for 3-4 month with some battery and it will work so long time.

Also I've found these variants:

  1. HopeRF HM-R433/HM-T433 modules. They separate modules, so I need Arduino controller for them.
    Seems power consumption wont be low.

  2. Anarduino MiniWireless - Anarduino MiniWireless Details
    These microcontrollers also built on chip RFM69HW/RFM69W

  3. JeeNode Micro or JeeNode USB
    The JeeLabs Shop - Products
    They uses HopeRF’s RFM12B wireless radio module.

but there is have to be more devices which I don't know yet.

So I will be very appreciate for any help and advises from peoples who has some experience in that area.
I need buid several transceivers so total cost of equimpent important for me, but of course, ability to work in such cold condition is more important.

Thanks.

2

See this solar powered Arduino sensor project.