Problem getting XBee to work on new board

Wireless & IoT
1

I made my first PCB the other day and the XBee part of the program seems to keep crashing.

It is a propeller based board.

Here’s my spin code:

CON
  _clkmode = xtal1 + pll16x
  _xinfreq = 5_000_000
OBJ
  XB:     "XBee_Object"
VAR  
  'xbee properties
  byte xbeeLg[20] 'only uses 16, but plus null term and need long align
  byte xbeeSm[12] 'only uses 8, but plus null term and need long align
PUB Program     
  '...
  XB.AT_Config(@xbeeNet16)   ' request value
  XB.Rxstr(@xbeeLg[0]) 'This is where is appears to get stuck

DAT
  newln           byte    13, 10, 0            
  xbeeNet16       byte    "ATMY", 0

And "XB" is the library taken from the parallax website

This is a circuit that works fine on proto board, but doesn’t work on the PCB for ONLY the XBee portion of it.

Can you think of what I should be testing? What should I be scoping? Checking noise on the power lines?

Give me a start on where to look? What would cause an XBee to act very strangely?

2

Just a list of things I’ve done wrong.

Recheck the circuit connections and soldering.

Recheck that the proto and pcb have the components connected the same way.

Recheck voltages with a meter and scope. Are the power supply caps the same?

Is the XBee and propeller grounds connected?

O’scope the XBee data lines.

Is the Propeller 3.3V? The XBee is. If 5V are the level translation working, check with the scope.

Is the code the same? Or did you make changes?