I have a problem:
when I sent 0x00 he answers me with 0x00 and 0x1D he send me 0x00 but when I insert valide coins he gives me nothing
i connect the + 5V / gnd / rx / tx
what is there for another pin that I must use.
here is the pdf I use (manual) to better understand
thanks for all the help
Rs232english.pdf (90.5 KB)