KNXNetworkLinkFT12: detect status, CEMI setting....

[holgerfriedrich]

KNXNetworkLinkFT12: detect status, CEMI setting....

[bmalinowsky]

No, the FT1.2 transmission protocol itself is not concerned with KNX.

For Weinzierl, you can try the following utility:

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import tuwien.auto.calimero.Connection.BlockingMode;
import tuwien.auto.calimero.KNXException;
import tuwien.auto.calimero.serial.FT12Connection;

/**
 * PEI check for Weinzierl FT1.2 cEMI support.
 * Compile-time jar deps: calimero-core, calimero-rxtx+nrjavaserial, slf4j-api
 */
public final class WeinzierlFt12CemiSupport {
	private static final int peiIdentifyReq = 0xa7;
	private static final int peiIdentifyCon = 0xa8;

	public static void main(final String[] args) throws KNXException, InterruptedException, TimeoutException {
		if (args.length == 0)
			System.err.println("supply FT1.2 communication port identifier");
		else
			System.out.println(supportsCemi(args[0]));
	}

	public static boolean supportsCemi(final String portId)
			throws KNXException, InterruptedException, TimeoutException {
		try (var conn = new FT12Connection(portId)) {
			final var cemi = new CompletableFuture<Boolean>();
			conn.addConnectionListener(frameEvent -> {
				final var frame = frameEvent.getFrameBytes();
				if ((frame[0] & 0xff) == peiIdentifyCon) {
					// PEI_identify.con is 9 bytes, Weinzierl cEMI support is indicated by 2 extra bytes
					cemi.complete(frame.length == 11);
				}
			});

			conn.send(new byte[] { (byte) peiIdentifyReq }, BlockingMode.NonBlocking);
			return cemi.get(1, TimeUnit.SECONDS);
		}
		catch (final ExecutionException na) { throw new AssertionError(); }
	}
}

[holgerfriedrich]

Thank you @bmalinowsky, I will check if I can make use of this.