Hello fellas, I’m new in Arduino world just want to play around with my first project and wondering if someone can show me the best way to start, I’m planing to comunícate between Arduino using LoRa I was reading a lot about it, and send sensor data from a few board to one receiver, I need to make de smaller Arduino project, so wondering is someone can help me to choice the right board and Lora possible so don’t wasted time and money getting the wrong things
Thanks in advance!!!
Before you start that advanced project, get an Uno and work through some of the simple examples that come with the software development package (the Arduino IDE).
Learn to read a switch, a sensor, a voltage, blink LEDs and learn details of the programming language and special features of the Arduino.
Lots of tutorials on line too. Save yourself endless frustration.
Agree with previous post. If you do go LoRa route, learn LoRaWAN. RadioHead is great for LoRa, but you’ll be stitching together a gateway if you want internet. LoRaWAN you just buy the gateway. Good luck.
Hi,
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
OR
http://forum.arduino.cc/index.php/topic,148850.0.html.
Have you done any basic work/coding with Arduino yet?
Can you please tell us your electronics, programming, arduino, hardware experience?
There are many ways of instigating Lora, especially on a multi slave system and as you are looking for a small sized and possible low power consumption, this will add to the system type decisions.
What is your proposed application, knowing the big picture will help in this case.
Thanks.. Tom... 
If you want to start simple and communicate long distances between two Arduinos, then point to point LoRa is definetly the way to go.
LoRa devices are 3.3V devices so to avoid the complexities of logic level conversion use 3.3V logic Arduinos from the start; a low cost 3.3V Arduino Pro Mini is perfectly adequate for lots of applications. You can use 5V Arduinos like the UNO but then you need to be sure and LoRa boards or shields have appropriate Logic level conversion.
If later you change your mind and you want to send your sensor data not between twoArduinos but direct to the Internet for viewing etc, then do consider using LoRaWAN. However using LoRaWAN requires that your Arduinos are within range of a LoRaWAN Gateway. There are a great many places in the World where there are no LoRaWAN Gateways at all, in which case you would need to build or buy your own Gateway. A relativly complex and costly project.
The complexities of logic leveling are usually rather simple.
A diode and a pullup resistor do the job nicely and waste less power than a resistor and a resistor.
I have seen more complicated levelers involving MOSFETs, they might be faster otherwise why bother?
And with a 74HC4050 you get 6 levelers in a little chip for about 50 cents or less depending on how many you buy.