![]() The Turnout and Sensor scripts were originally developed using JMRI 4.15. ![]() I hope this makes things a bit more clear. I am glad you were successful with your project! You likely have a variation where this was not needed. At some point, things work, or I have to refer modelers to more expert support. If there is still a problem, I will offer changes (like the insert import java.beans that others have tried successfully. When someone reports a problem, I first try to help them through the set-up basics of my project to make sure they followed the original instructions. Nonetheless, if you use multiple versions of JMRI over the years you will realize it is constantly changing. I am neither a JMRI developer nor a JMRI expert, but I appreciate the fine work the JMRI developers present to us. These has become very popular, and modelers are making it work in more and more different configurations. JMRI issued several new releases since I published these Arduino channel tools (which originally only were tested on one version of JMRI on a Windows PC). ![]() However, there are many variations of the environment in which they operate: Versions of JMRI, versions of PC's and operating systems (MS Windows, RPi Linux, etc.), library revisions, etc. The short answer is "because it was reported to work." All my projects, both software and hardware, have been tested to operate correctly, in the precise configuration I used and described. Why do you need to add "import java.beans" to TurnoutDataTransfer.py ? This is also the companion “Output” data channel to SMA28 JMRI Sensor Channels – Direct Arduino to JMRI Communications It is an easy to build project where you can map lots of internal JMRI switches to real-world devices (LEDs, panel displays, motors, servos, etc., at a low cost. This is not a tutorial on the intricacies of JMRI. Multiple channels can operate simultaneously, and are not dependent on any DCC base station. It gives the modeler more flexibility to connect (per channel) some 68 turnout entries to Arduino digital pins for about $7, and is fully operational with all the JMRI applications. This article details the implementation of a JMRI data channel, which provides data from the JMRI Turnout Table in bulk, and incrementally as changes occur through operations. Among its basic control elements are turnouts, usually referring to a track switch or set of “points” but in its most elemental form, really refers to a binary switch. It has capabilities to monitor trains and track to enable control and signal systems for virtually any model railroad layout. It is free, widely used, and readily available. The Java Model Railroad Interface (JMRI) is an elegant but sometimes complex application growing in popularity beyond its fantastic facility to ease DCC decoder setup.
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