I am trying to set up mango to read electric meters via Modbus.
When I create a data source, I select Modbus serial, a port shows up as /dev/ttyS0; I set the baud rate to 19200 and save.
I can scan for nodes and find all the nodes that I expect to find.
I create a point:
Slave id: 10
Register Range: Holding register
Modbus data type: 2 byte unsigned integer
...and save; then activate the source and point.
When I go to the watch list I add my point and generally it will read the register (right now when I am testing it won't).
Here's the weird part: when I go back to data sources and edit the source I just created, no Port shows up.
When I disable the source and then enable it again I get the following error:
**Error while initializing data source: com.serotonin.io.serial.SerialPortException: gnu.io.NoSuchPortException
My question is: where could the problem be?
- is it hardware
- is it the meters?
- is it the serial port drivers?
- is it my mango installation?
Any suggestions with regards to how I can isolate the problem are very welcome. Thanks!
Server version: Apache Tomcat/6.0.20
Server built: May 14 2009 01:13:50
Server number: 188.8.131.52
OS Name: Linux (Ubuntu)
OS Version: 2.6.28-11-generic
JVM Version: 1.6.0_13-b03
JVM Vendor: Sun Microsystems Inc.
Mango version: 1.4.2