"ouz as" <[EMAIL PROTECTED]> wrote: > i have an electronic module which only understand binary data. > i use python pyserial. > for example the module starts when 001000000 8-bit binary data sent.but
that's nine bits... > pyserial sent only string data. in computers, bits are combined into bytes (or longer machine words). the strings you pass to pyserial are treated as byte sequences. this might help you figure out how to convert between bit patterns and byte values: http://www.math.grin.edu/~rebelsky/Courses/152/97F/Readings/student-binary.html > Can i send this binary data with pyserial or another way with python. convert the bitpattern to a byte, and send it to pyserial. 01000000 = 0x40 (hex) = 64 (dec) so ser.write(chr(64)) or ser.write(chr(0x40)) or even ser.write("\x40") to go from a byte to a bitpattern, use ord(byte): ord(chr(0x40)) = 0x40 hardware-oriented code often represent bitpatterns as hex constants. by using constants, it's easy to combine different bits: FLAG1 = 0x40 FLAG2 = 0x20 ser.write(chr(FLAG1)) # set first flag ser.write(chr(FLAG1|FLAG2)) # set both flags flags = getstatus() ser.write(flags ^ FLAG2) # toggle flag 2 etc. </F> -- http://mail.python.org/mailman/listinfo/python-list
