@zsakul Try downloading the latest version from github. The master branch will be updated to version 2.1 very soon and I recommend waiting for that. https://github.com/mysensors/MySensors/tree/master Once you have updated you should be able to use MY_TRANSPORT_WAIT_READY_MS in your code. I have it working in my device. You could change MY_TRANSPORT_WAIT_READY_MS in the myconfig.h file but if you do it there every node you build will have this setting (which my not be desired).