Invalid checksum and Unsupported operating mode with java API.

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1

Hello I have been working on using an raspberry pi with an Xbee.
So far i’m using my computer as the controller, I have downloaded the Xbee java library made by digi.

So far i wanted to modify a IO to high/low (lets start simple).
I tried sending it to a remote device got an error (seen at the end), when i got this i thought i’d try just with the local device. Same error.

Here is the piece of code and the error.

Thanks in advance guys !

Code

XBeeDevice myDevice = new XBeeDevice(PORT, BAUD_RATE);
myDevice.open();

            XBee64BitAddress addresseCapteur1 = new XBee64BitAddress("0013A2004146706F");

	RemoteXBeeDevice capteur1 = new RemoteXBeeDevice(myDevice, addresseCapteur1);
            
            myDevice.setIOConfiguration(IOLine.DIO4_AD4,IOMode.DIGITAL_OUT_LOW);

Error

SEVERE: Error parsing the API packet.
com.digi.xbee.api.exceptions.InvalidPacketException: Invalid checksum (expected 0xBD).
at com.digi.xbee.api.packet.XBeePacketParser.parsePacket(XBeePacketParser.java:192)
at com.digi.xbee.api.connection.DataReader.run(DataReader.java:409)

Jul 18, 2016 11:30:35 AM com.digi.xbee.api.XBeeDevice close
INFO: [/dev/tty.usbserial-AL016TA8 - 9600/8/N/1/N] Connection interface closed.
Exception in thread “main” com.digi.xbee.api.exceptions.InvalidOperatingModeException: Unsupported operating mode: AT mode
at com.digi.xbee.api.XBeeDevice.open(XBeeDevice.java:221)
at xbeepc.XbeePc.main(XbeePc.java:65)

2

I just wanted to add that i am working with two series 1 Xbee in API mode.

Whats more, for the same program the expected checksum varies, I find that a little odd.

3

Problem solved.

It appeared that having both Xbees plugged in to the computer was giving me that error.
Solved it by giving the other Xbee a separate power supply.
(also not quitting netbeans between two runs)

4

I am not familiar with this library but the following error message in the log may be at the root of your problem.

Unsupported operating mode: AT mode

Is your PC XBee operating in AT mode? Seems like the library was designed for API mode.

5

Problem solved.

It appeared that having both Xbees plugged in to the computer at the same was giving me that error.
Solved it by giving the other Xbee a separate power supply, and also quitting netbeans between two runs.

Don’t know which of both was the most critical but the basic programs work now.