Get RSSI value with XBee Java Library in Raspberry Pi

XBee & XBee Gateway
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1

Hello,

I have connected a XBee Pro S2B + XBee Usb Explorer + Raspberry Pi.

I used XBee Java Library and XBee’s are in Api 2 Mode.

I need to get the RSSI value of remote XBee devices.

I have to connect the Raspberry Pi PIN6 (as is done in Arduino) or not needed if I have the XBee Explorer USB?

I tried so, but not works:

localXBee.setIOConfiguration(IOLine.DIO10_PWM0,  IOMode.SPECIAL_FUNCTIONALITY);
    								localXBee.setPWMDutyCycle(IOLine.DIO10_PWM0, 90);

and to get the value so:

								double value = localXBee.getPWMDutyCycle(IOLine.DIO10_PWM0);
								LOG.info("RSSI Value: " + value);

But guess is wrong, because not works.

Best regards.

2

Hi!

Thanks for the question.

There exists a parameter that returns the RSSI of the last received packet, DB.

You can read it as follows:


byte[] rssi = localXBee.getParameter("DB");
LOG.info("RSSI Value: " + ByteUtils.byteArrayToInt(rssi));

You don’t have to change the configuration of the DIO10.

Hope this helps.
Regards.

3

Thank you!

Works fine.

But what I can use to update that value?

I used ScheduledExecutorsService to update each 5 seconds, and works, but when I changed (.setDIOValue(IOLine.DIO0_AD0, IOValue.LOW):wink: of RemoteXbee, ExecutorsService stops working.

Is there something that works better?

Should I use these interfaces , IPacketListener or IDataListener?

Regards.

4

What value do you want to update?
What exception is thrown when you use that method?

5

Of remote Xbee.

I have 30 Xbee’s + 1 router (antenna) + 1 coordinator ( Raspberry Pi + PiTFT + Lipo Battery 3.7V 6000 mAh + pololu 3.7V to 5V converter).

On Raspbian I have a JavaFX application with a ListView with 30 items, each one associated to a XBee. I want that when the operator touch a item is recovered a rssi value of XBee selected.

Regards

PD: I got this error, https://github.com/digidotcom/XBeeJavaLibrary/issues/27

6

Of remote Xbee.

I have 30 Xbee’s + 1 router (antenna) + 1 coordinator ( Raspberry Pi + PiTFT + Lipo Battery 3.7V 6000 mAh + pololu 3.7V to 5V converter).

On Raspbian I have a JavaFX application with a ListView with 30 items, each one associated to a XBee. I want that when the operator touch a item is recovered a rssi value of XBee selected.

Regards

7

Ok, you should read then the DB parameter for the selected remote XBee if you want to know its RSSI value.


int rssi = ByteUtils.byteArrayToInt(remoteXBee.getParameter("DB"));
8

Thank you!

I’ll try as soon as possible.

Best regards