Electronics > Electronics
Connecting an Xbee to the Axon
madsci1016:
I use an 900 pro Xbee on a regulated board connected directly to an Axon Uart and have no issues at all. It has worked for a few months now.
waltr:
Ok, I measured the DIN pin on the XBee with the diode in series from the PIC's Dout line.
The low level signal is 0.52 Volt.
Admin:
The low is fine. Whats the high level signal?
waltr:
Ok, charged the battery and re-measured the serial signal levels.
PIC output to XBee regulator board: High = 4.65V, low = 0.14V
DIN on XBee pin: High = 3.20V, low = 0.50V
bonzo:
I too am using the sparkfun regulated explorer and am receiving commands just fine, but transmitting does not seem to work.
I have used the same combination of xbee / regulator with an arduino and have not problems transmitting and receiving.
With the axon, I have tried UART2 and UART0 and have tried baud rates of 9600 and 19200 with the same behavior.
Here is the really weird thing : when trying to transmit from the axon, the little green led on the xbee regulator lights up, but nothing is received on the computer and the corresponding green light on the USB explorer does not light up. BUT when I then send more commands from the computer, they are received by the AXON and the green transmit lights up on the AXON and the computer, but what comes across is just gibberish (on the computer). I have tried sending both single bytes and rprintf strings.
Again the thing that is odd is that when the AXON is just sending, the computer does not receive anything, but when the computer sends information to the AXON, the computer does receive information from the xbee, but it is just gibberish.
I have also tried two separate regulated explorers and xbees with exactly the same behavior and both work with arduino.
Any thoughts on this? I am kind of stuck any ideas would be appreciated.
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