the alternative (read "proper") is FTDI http://forum.arduino.cc/index.php?topic=189239.0
On Mon, 20 Aug 2018 at 11:37, Paul van den Bergen < [email protected]> wrote: > the ones I played with used the CH340 chipset: > https://sparks.gogo.co.nz/ch340.html > https://cdn.sparkfun.com/datasheets/Dev/Arduino/Other/CH340DS1.PDF > > do you know what chipset it's using? > > On Mon, 20 Aug 2018 at 11:32, Paul van den Bergen < > [email protected]> wrote: > >> Yeah, that's probably fine - but it's still something I'd look at for >> workarounds... that whole "connect then fail to interact" thing sounds >> familiar... it's waiting for something that never comes, or the return is >> swallowed by the USB serial chip... >> >> >> On Mon, 20 Aug 2018 at 10:47, cory seligman <[email protected]> wrote: >> >>> Yes, I am using a USB serial dongle. It's a known reasonably good >>> quality brand that otherwise works fine interactively. >>> >>> >>> >>> >>> >>> On Mon, Aug 20, 2018 at 10:33 AM, Paul van den Bergen < >>> [email protected]> wrote: >>> >>>> are you using a USB to Serial dongle? for some time now they've been a >>>> standardised SoC that apparently handles breaks poorly... so if the system >>>> is expecting a break... >>>> >>>> (found this out for Unify PABX and Cisco serial - in the latter case, >>>> dropping the speed to 2400 and holding down space bar for 15 seconds was >>>> enough to fake a break - go figure... weird ) >>>> >>>> >>>> On Mon, 20 Aug 2018 at 10:29, cory seligman via luv-main < >>>> [email protected]> wrote: >>>> >>>>> Hi All, >>>>> >>>>> I'm having some trouble making expect work. >>>>> >>>>> I need it to talk to some vintage equipment over usb serial, and I >>>>> think I'm getting hung up on opening the port. >>>>> >>>>> When the script runs, it just connects to the device and sits there. I >>>>> can drive it interactively, but it doesn't attempt to automate anything. >>>>> >>>>> Any ideas? Thanks. >>>>> >>>>> My expect script looks like this: >>>>> >>>>> #!/usr/bin/expect -f >>>>> >>>>> # device >>>>> set modem /dev/ttyUSB0 >>>>> >>>>> # keep it open >>>>> exec sh -c "sleep 3 < $modem" & >>>>> >>>>> # serial port parameters >>>>> exec stty -F $modem 2400 raw -clocal -echo -istrip -hup >>>>> >>>>> # connect >>>>> send_user "connecting to $modem, exit with ~,\n" >>>>> spawn -open [open $modem w+] >>>>> interact { >>>>> ~, exit >>>>> ~~ {send "\034"} >>>>> } >>>>> >>>>> set force_conservative 1 ;# set to 1 to force conservative mode even if >>>>> ;# script wasn't run conservatively originally >>>>> if {$force_conservative} { >>>>> set send_slow {1 .1} >>>>> proc send {ignore arg} { >>>>> sleep .1 >>>>> exp_send -s -- $arg >>>>> } >>>>> } >>>>> >>>>> set timeout -1 >>>>> match_max 100000 >>>>> send -- "\r" >>>>> send -- "\r" >>>>> expect ">" >>>>> send -- "p 7d91\r" >>>>> expect ">" >>>>> send -- "p b2ff\r" >>>>> expect ">" >>>>> send -- "h\r" >>>>> expect ">" >>>>> send -- "td\r" >>>>> expect "td\r >>>>> 18 215 12 24 33\r >>>>> >" >>>>> send -- "gd 215\r" >>>>> expect eof >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> luv-main mailing list >>>>> [email protected] >>>>> https://lists.luv.asn.au/cgi-bin/mailman/listinfo/luv-main >>>>> >>>> >>>> >>>> -- >>>> Dr Paul van den Bergen >>>> >>>> >>> >> >> -- >> Dr Paul van den Bergen >> >> > > -- > Dr Paul van den Bergen > > -- Dr Paul van den Bergen
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