Hi,
I developed (modify) the originale Oregon library to be able to decode these sensors and send results in MySensors.
Tested with : THGR228N and THGN132N
It's a beta version ... many enhancements must be necessary, but it works
https://goo.gl/x4ifu4
your comments are welcome 
Arduino has accepted my library
it available in libraries manager on the arduino IDE
I'm sorry for that
It works perfectly after the library update
thank you very much @sundberg84
HAAAAAAAAAAAAAAAAAA !!!!!! pffffffffffff !!!!
so noob I am 
it's work now !
I have a lot of arduino in my network, and there are diffrent MAc address => normal !
But in arduino with my sensor there wasn't MY_MAC_ADDRESS defined.
and... two arduino with the same MAC (default MAC) ... pffff ==> doesn't work fine!!!!
now it's work perfectly ! I'm sorry for you waste time !
thanks !
Just before my vacations, I added some features
My GitHub: https://goo.gl/x4ifu4
Results on My OpenHAB
there is this issue when I want "verify code" in codebender (see below), but with arduino soft 1.6.7 it works fine
MySensors_433Mhz_Oregon.ino:66:19: error: use of undeclared identifier 'digitalPinToInterrupt'
First version of my official arduino library : https://github.com/Mickaelh51/Arduino-Oregon-Library
I asked at Arduino software to put this new library (1.5 arduino format) in their official "libraries manager" ==> https://github.com/arduino/Arduino/issues/4371
If they ok to include my library, the arduino IDE will be able to check the available updates.
This 1.0.0 version has been tested with : Arduino UNO / 433Mhz receiver / Oregeon sensor THGR228N.
I'm already working on developement github branch with many enhancements.
Ex: Data Checksum / Others sensors (OWL Electricty Meter / WGR918 Annometer / RGR918 Rain Guage / UV138 / THGR918 Outside Temp-Hygro / BTHR918 Temp-Hygro-Baro)
if you want to test master or developement branch, I'm free to discuss with you.
good playing