The PCA301 code got merged into the 2.3 branch yesterday. 
I have another change in the pipeline that should make sure that the init commands are sent correctly.
Previously, the init commands have been sent when the first reading was received. This did obvioulsy not work if you needed an init command to change the datarate in order to receive readings.
Therefore I have now changed the code to send the init commands after the first reading has been received or a configurable timeout has occurred. The timeout is 15s by default and can be changed in the stick configuration.
Together with the changes that have been merged, this should now make LGWs work. I have destroyed some parts with my soldering iron in the process of building a LGW. But now that I got it working I have tested the binding code and everything looks good so far.
I have connected LaCrosse and PCA301 sensors and both are working fine.
It would be nice if some of you could test the updated binding before I create a pull request:
https://github.com/vbier/openhab2-addons/raw/jars/addons/binding/org.openhab.binding.jeelink/org.openhab.binding.jeelink-2.3.0-SNAPSHOT.jar