Situation: I'd like to use my age-old VT420 console on my Pi 3B. As the UART is already occupied, I plugged a USB-to-serial dongle with CH341 chip (lsusb
told me that) into one of the USB ports on the Pi and attached the terminal there. But: No data are neither received, nor transmitted! I tried it out using minicom, but no use. Here's my config:
pi@autoradio:~ $ ls -al /dev/ttyUSB*
crw--w---- 1 root tty 188, 0 Dez 27 17:59 /dev/ttyUSB0
pi@autoradio:~ $ sudo stty -F /dev/ttyUSB0 -a
speed 9600 baud; rows 24; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd -cmspar cs8 hupcl -cstopb cread clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff
-iuclc -ixany -imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
-isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop -echoprt
-echoctl -echoke
pi@autoradio:~ $ lsmod | grep ch341
ch341 6086 1
usbserial 29943 3 ch341
pi@autoradio:~ $ uname -a
Linux autoradio 4.9.35-v7+ #1014 SMP Fri Jun 30 14:47:43 BST 2017 armv7l GNU/Linux
What puzzles me, is the following: I set the baudrate to 19200, but my dongle seems to ignore that and keeps on pretending the baudrate was 9600! The terminal, on the other hand, is set to 19200.
BTW: On my Linux PC, the concole does work when attached to an RS232 port.
What shall I do here? Thank you!