StrawberryBlue commented on issue #1212:
URL: https://github.com/apache/plc4x/issues/1212#issuecomment-1955501803
I am using a serial device on Windows,
`public static String MODBUS_RTU_CONNECT_OPTION =
"modbus-rtu:serial://COM30?request-timeout=5000&unit-identifier=1&serial.baud-rate=9600&serial.num-data-bits=8&serial.num-stop-bits=1&serial.parity=NO_PARITY";
public static String MODBUS_TCP_CONNECT_OPTION =
"modbus-tcp:tcp://127.0.0.1:502";
@Test
public void modbusRtuRead(){
try (PlcConnection connection =
PlcDriverManager.getDefault().getConnectionManager().getConnection(MODBUS_RTU_CONNECT_OPTION))
{
// Check if this connection support reading of data.
if (!connection.getMetadata().isReadSupported()) {
log.error("This connection doesn't support reading.");
return;
}
PlcReadRequest.Builder builder = connection.readRequestBuilder();
builder.addTagAddress("value-1", "400001:UINT[10]");
PlcReadRequest readRequest = builder.build();
PlcReadResponse response = readRequest.execute().get(5000,
TimeUnit.MILLISECONDS);
for (String tagName : response.getTagNames()) {
if(response.getResponseCode(tagName) == PlcResponseCode.OK) {
int numValues = response.getNumberOfValues(tagName);
// If it's just one element, output just one single line.
if(numValues == 1) {
log.info("Value[" + tagName + "]: " +
response.getObject(tagName));
}
// If it's more than one element, output each in a
single row.
else {
log.info("Value[" + tagName + "]:");
for(int i = 0; i < numValues; i++) {
log.info(" - " + response.getObject(tagName, i));
}
}
}
// Something went wrong, to output an error message instead.
else {
log.error("Error[" + tagName + "]: " +
response.getResponseCode(tagName).name());
}
}
}catch (Exception e){
e.printStackTrace();
log.error("connect fail");
}
}`
Like the code , when attempting to establish a connection, the program
throws an exception.
`2024-02-21T08:16:30.878+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Instantiating new PLC Driver Manager
with class loader jdk.internal.loader.ClassLoaders$AppClassLoader@2b193f2d
2024-02-21T08:16:30.879+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Registering available drivers...
2024-02-21T08:16:30.884+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Registering driver for Protocol
modbus-ascii (Modbus ASCII)
2024-02-21T08:16:30.885+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Registering driver for Protocol
modbus-rtu (Modbus RTU)
2024-02-21T08:16:30.886+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Registering driver for Protocol
modbus-tcp (Modbus TCP)
2024-02-21T08:16:30.889+08:00 INFO 3276 --- [ main]
o.a.plc4x.java.DefaultPlcDriverManager : Registering driver for Protocol s7
(Siemens S7 (Basic))
org.apache.plc4x.java.api.exceptions.PlcConnectionException: Unsupported
transport serial`
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