XBee best input for ultrasonic distance sensor

XBee & XBee Gateway
1

Hi everybody,

  • I have an ultrasonic distance sensor: LV-MaxSonar EZ3
    It has 3 outputs: serial, analog voltage and pulse width.

*Serial: ASCII format.
*Analog: 2.54 mV / cm (using a 3.3 V input). Range: 38mV-1.6V.
*PW: 58 us / cm.

  • On the other hand, I also have one XBee Series 2 to send the information. So, my remote node will be the ultrasonic sensor and the XBee. The maximum voltage that can be applied to analog IO pin is 1.2V.

I would like to know the best option to connect one of these outputs to my XBee.

Thank you very much.

2

The best option is to use the UART since it offer that.

3

Thanks mvut for your reply.
I was thinking that would be the best option.

So,I need to connect the serial output to DIN XBee input (PIN 3). Am I right?

Another question appears when I want to connect a motion sensor (1= if detects movement, 0 if not). Now, the motion sensor has only a digital output so I connect it to pin AD0 (AD03). If I want to send the two sensor information (motion+ distance) using the same frame type (ZigBee I/O Data Sample Rx Indicator), do I need to use the analog output from the distance sensor (for example: connect it to pin AD1, AD12)?

Thanks

4

That is correct. You connect the data out to the data in of the xbee.

No that is not an analog connection but a Digital IO. You would need to set the DIO0 as a Digital Input. Then on the receiving module, you need to use API mode an read the data from the UART of the change.