Comments for BigCat's Blog of DOOM

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Thu, 26 Jan 2012 21:40:50 +0000

You should reference this document for more details on how ModBus works and common conventions for registers and stuff like that. It is a really great document on the protocol IMO. If that doesn’t work, the official modbus spec is readily available online and free (just google it – I think it is the first hit).

http://www.lammertbies.nl/comm/info/modbus.html

Comment on Modbus-Droid / MobileModbus by Jose

Jose — Thu, 26 Jan 2012 18:44:49 +0000

Hello, I think you developed a really usefull ap, my question is:

When I poll my PLC using a Modbus TCP OPC server I query address 410300, in Modbus-Droid which address should I input?

Thanks for your help.

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Thu, 26 Jan 2012 05:30:38 +0000

Frank, I imagine that you are trying to read an input register based on the 30000 offset. I suggest trying to read address 256 with the type set to input register. Let me know if that works, and if not, what error message you are getting that prevents you from inputting the entire register offset you want to. And if you would, post any of your other questions or bugs at the launchpad site mentioned in the main post. Thanks and best of luck with your getting your device to work with the app!

Comment on Modbus-Droid / MobileModbus by frank

frank — Tue, 24 Jan 2012 03:08:43 +0000

I am trying to read the addresss 30256 but the apk shows the address 30256 doesnt allowme to have the complete address. Any idea how to get the complete address??

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Tue, 29 Nov 2011 01:40:48 +0000

I would really appreciate it if you would go to the launchpad site for this project and post your questions there.

Furthermore – this application doesn’t currently support Modbus RTU.

Comment on Modbus-Droid / MobileModbus by Hasip TUNA

Hasip TUNA — Mon, 28 Nov 2011 17:53:36 +0000

Sorry Bigcat,Our company IP address is dinamically. Our ip address now 85.100.151.0

Comment on Modbus-Droid / MobileModbus by Hasip TUNA

Hasip TUNA — Mon, 28 Nov 2011 08:56:21 +0000

Please,Read 10000 address and two byte packet modbus RTU type for my device. Other address are password protected.My device return error code.

Comment on Modbus-Droid / MobileModbus by Hasip TUNA

Hasip TUNA — Mon, 28 Nov 2011 07:11:13 +0000

Hello Bigcat,
My device address is 85.107.41.190 and port 502. My device response is a little delaying about 100 -200 ms.
I disabled m message lines at com.bencatlin.modbusdroid.MbDroidMsgExceptionHandler.receivedException.Your code is no error above.

Thanks for the feedback.

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Sun, 27 Nov 2011 20:47:39 +0000

1) I’d really like any issues or questions posted at launchpad.net/modbusdroid

2) I’m going to need a lot more information about what is going on here. Are you compiling this yourself and running it from eclipse? If so, is this the first time you’ve tried getting an app to run on your device from eclipse. What are you doing when this error occurs? What IP address are you trying to connect to, and what are all the values in your settings page? And what addresses are you trying to write to?

Comment on Modbus-Droid / MobileModbus by Hasip TUNA

Hasip TUNA — Fri, 25 Nov 2011 12:00:24 +0000

Hello BigCat,
I want to use your modbus code.But your code some errors when i want to connect my device. What is this error source?
11-25 11:49:49.600: E/AndroidRuntime(348): FATAL EXCEPTION: Modbus4JTcpMaster
11-25 11:49:49.600: E/AndroidRuntime(348): java.lang.NullPointerException
11-25 11:49:49.600: E/AndroidRuntime(348): at com.bencatlin.modbusdroid.MbDroidMsgExceptionHandler.receivedException(MbDroidMsgExceptionHandler.java:23)
11-25 11:49:49.600: E/AndroidRuntime(348): at com.serotonin.messaging.MessageControl.data(MessageControl.java:156)
11-25 11:49:49.600: E/AndroidRuntime(348): at com.serotonin.messaging.InputStreamListener.run(InputStreamListener.java:76)
11-25 11:49:49.600: E/AndroidRuntime(348): at java.lang.Thread.run(Thread.java:1019)

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Mon, 14 Nov 2011 14:08:27 +0000

Right now they are all included w/ the source code for the project at http://www.launchpad.net/modbusdroid. I think I added a a locator class that was for getting a range of registers in order to avoid using the built-in functionality that packs requests together and initiates a ‘batch’. I needed more of a simple polling.

Unfortunately I haven’t separated them out, and didn’t really do a good job of keeping the changes in some form that is easy to track (which is a bummer and not smart on my part because now I would love to re-sync w/ the main svn of modbus4J and it is a PITA for me to remember what I did). I have a few ideas to work on this project to improve it a bit, and one thing I might do is separate out just my modifications to the library as its own deal – as well as android 3.0+ tablet and phone support.

Comment on Modbus-Droid / MobileModbus by Ricardo

Ricardo — Mon, 14 Nov 2011 14:02:15 +0000

About the Modbus4J modifications, any chance you could put them up somewhere? It’d be great. Thank you.

Comment on Modbus-Droid / MobileModbus by BigCat

BigCat — Thu, 13 Oct 2011 12:30:35 +0000

I haven’t looked at that in a long time, so I’m pretty fuzzy on what I did. I think I made a class to make it easier for me to handle modbusTCP connections in Android, and I seem to remember making a few other changes for something (but I can’t remember what I did now).

I can extract out the library w/ the changes and put them somewhere convenient for you if you like.