I am trying to couple an intel edison board with a sparkfun UART shield to the xbee sx pro
the UART shield includes a level shifter TXB0104. Using a scope I succesfully manage to generate an UART signal and sending continuosly a byte at 9600baud.
with the scope I measured: vmax=3.687v, vmin=0.2v
now, when I connect the din to the Tx of the uart, the scope measures vmax=2.75v, vmin=1.25v
this causes a garbage being sent across and the data is not properly tranmitted.
I tried to disable/enable the pullup resistors without success.
any advice/better way to connect the xbee?