Yes Julian, am just using similar code mentioned by udeho. But am always
getting 0 value eventhough I updated holding registery value.
On Monday, June 8, 2020, Julian Feinauer <j.feina...@pragmaticminds.de>
wrote:
> In fact, when talking about modbus driver the question is rather if there
> is any code that was not changed between 0.6.0 and 0.7.0 : )
>
> But we should have a closer look here.
>
> Julian
>
> Am 07.06.20, 18:55 schrieb "venki hadoop" <hadoopons...@gmail.com>:
>
> Hi, after updating to 0.7 version am always getting value 0. Did you
> made
> any code modifications after version update?
>
> On Tuesday, June 2, 2020, udeho <ud...@student.kit.edu> wrote:
>
> > Hi,
> >
> > This was a problem with my Maven configuration. I'm sorry, I'm very
> > inexperienced with Maven.
> > Anyway, reading values from the holding register now works fine with
> > drivers of version 0.7.0.
> >
> > Best
> > Tim
> >
> > -----Original Message-----
> > From: Christofer Dutz <christofer.d...@c-ware.de>
> > Sent: Montag, 1. Juni 2020 23:27
> > To: udeho <ud...@student.kit.edu>; dev@plc4x.apache.org
> > Subject: Re: [Modbus] Querying Values from Holding Register
> >
> > Hi,
> >
> > Are you perhaps mixing different versions? The api and driver
> versions
> > should match.
> >
> > Chris
> >
> > ________________________________
> > Von: udeho <ud...@student.kit.edu>
> > Gesendet: Montag, 1. Juni 2020 14:58
> > An: dev@plc4x.apache.org <dev@plc4x.apache.org>
> > Betreff: RE: [Modbus] Querying Values from Holding Register
> >
> > Hi,
> >
> > I've just tried to do the same as below with the newly released 0.7.0
> > version.
> > Unfortunately, I get the following errors:
> >
> > [main] INFO org.apache.plc4x.java.PlcDriverManager - Instantiating
> new
> > PLC Driver Manager with class loader jdk.internal.loader.
> > ClassLoaders$AppClassLoader@129a8472
> > [main] INFO org.apache.plc4x.java.PlcDriverManager - Registering
> > available drivers...
> > Exception in thread "main" java.lang.NoClassDefFoundError:
> > org/apache/plc4x/java/spi/connection/GeneratedDriverBase
> > at java.base/java.lang.ClassLoader.defineClass1(Native
> Method)
> > at java.base/java.lang.ClassLoader.defineClass(Unknown
> Source)
> > at java.base/java.security.SecureClassLoader.defineClass(
> Unknown
> > Source)
> > at java.base/jdk.internal.loader.BuiltinClassLoader.
> defineClass(Unknown
> > Source)
> > at java.base/jdk.internal.loader.BuiltinClassLoader.
> > findClassOnClassPathOrNull(Unknown Source)
> > at java.base/jdk.internal.loader.BuiltinClassLoader.
> loadClassOrNull(Unknown
> > Source)
> > at java.base/jdk.internal.loader.
> BuiltinClassLoader.loadClass(Unknown
> > Source)
> > at java.base/jdk.internal.loader.
> ClassLoaders$AppClassLoader.loadClass(Unknown
> > Source)
> > at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
> > at java.base/java.lang.Class.forName0(Native Method)
> > at java.base/java.lang.Class.forName(Unknown Source)
> > at java.base/java.util.ServiceLoader$
> LazyClassPathLookupIterator.nextProviderClass(Unknown
> > Source)
> > at java.base/java.util.ServiceLoader$
> LazyClassPathLookupIterator.hasNextService(Unknown
> > Source)
> > at java.base/java.util.ServiceLoader$
> LazyClassPathLookupIterator.hasNext(Unknown
> > Source)
> > at java.base/java.util.ServiceLoader$2.hasNext(Unknown
> Source)
> > at java.base/java.util.ServiceLoader$3.hasNext(Unknown
> Source)
> > at org.apache.plc4x.java.PlcDriverManager.<init>(
> > PlcDriverManager.java:53)
> > at org.apache.plc4x.java.PlcDriverManager.<init>(
> > PlcDriverManager.java:44)
> > at modbus.playground.main(playground.java:108)
> > Caused by: java.lang.ClassNotFoundException:
> org.apache.plc4x.java.spi.
> > connection.GeneratedDriverBase
> > at java.base/jdk.internal.loader.
> BuiltinClassLoader.loadClass(Unknown
> > Source)
> > at java.base/jdk.internal.loader.
> ClassLoaders$AppClassLoader.loadClass(Unknown
> > Source)
> > at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
> > ... 19 more
> >
> > I added the new version as a dependency in Maven, but in the
> pom.xml is
> > also stated "Missing artifact org.apache.plc4x:plc4j-driver-
> > modbus:jar:0.7.0".
> > Used dependency in maven:
> > <dependency>
> > <groupId>org.apache.plc4x</groupId>
> > <artifactId>plc4j-driver-modbus</artifactId>
> > <version>0.7.0</version>
> > </dependency>
> >
> > Best
> > Tim
> >
> > -----Original Message-----
> > From: Christofer Dutz <christofer.d...@c-ware.de>
> > Sent: Mittwoch, 20. Mai 2020 11:28
> > To: dev@plc4x.apache.org
> > Subject: Re: [Modbus] Querying Values from Holding Register
> >
> > Hi Tim,
> >
> > I guess you are using one of the "old generation" drivers (As you
> say it's
> > working and the address seems to imply that).
> > Perhaps you should either try the version 0.8.0-SNAPSHOT or wait for
> 2
> > more days till we release the 0.7.0 version.
> >
> > In the 0.7.0 version we have completely deleted all existing drivers
> and
> > replaced them by new ones.
> > While at it I took the liberty of making the Modbus a little more
> robust.
> >
> > So it would be great if you could give us feedback if your problem
> goes
> > away magically when updating to these driver versions.
> >
> > Chris
> >
> >
> >
> > Am 20.05.20, 10:24 schrieb "udeho" <ud...@student.kit.edu>:
> >
> > Hi all,
> >
> > I have tried to query values from the holding register of a
> simulated
> > modbus device and process them as integer using the following code:
> > // read integer / holding register
> > PlcDriverManager driverManager = new
> > PlcDriverManager();
> > String conString = "modbus:tcp://localhost";
> > PlcConnection plcCon =
> driverManager.getConnection(
> > conString);
> > PlcReadRequest.Builder builder =
> > plcCon.readRequestBuilder();
> > builder.addItem("value",
> "readholdingregisters:1");
> > PlcReadRequest readRequest = builder.build();
> > PlcReadResponse resp =
> readRequest.execute().get();
> >
> > This runs well, but when I try to handle the result as integer
> (using
> > resp.getInteger("value")) I always get null as result no matter
> what's in
> > the register.
> > For Boolean values in the coil this works without any problem
> (using
> > getBoolean() of course).
> > Another approach I tried is using the getAllByteArrays("value");
> > command, but I haven't found a way to get the returned collection of
> byte
> > arrays into integers.
> >
> > Can you give me an indication of what my problem may be or what
> I'm
> > doing wrong?
> >
> > Thank you very much in advance!
> >
> > Best
> > Tim
> >
> >
>
>
