Would you expect that a device with a programming port described as “4V level UART polarity (inverted RS232) input” would work with a Panda COM port? Seems like there is between 2 and 3 volts on the line depending on how many other pins are in use at the time. Has anyone dealt with something like this and used something special to keep it at 4V exactly? I have a radio module and I can get it to transmit a modulated signal but I can’t get any serial commands to work at 2400/8/N/1.
Full manual is here - http://www.radiometrix.com/files/additional/shx1.pdf