Replying to myself...Read manual...terminal does not talk to modems at 2400b, had to step down to 300b, worked.
On Fri, Aug 12, 2022, 2:25 PM Bill Degnan <billdeg...@gmail.com> wrote: > I have an old terminal without a CTS line. If I hook up my laptop running > Teraterm 2400,7N1 to the terminal and use a null modem cable I can type > characters in the laptop and they appear on the terminal and if I type > characters in the terminal they appear on the laptop. > > If I attach an ESP82660 WIfi modem to the laptop running teraterm I can > connect, etc to use the WIFI - i.e. connect to a telnet service (ATDT > bbs.fozztexx.com or towel.blinkenlights.nl). > > If I attach the same ESP82660 to the terminal, the ESP transmits to the > terminal fine (to show the initial connection screen) but I when I type > characters (such as ATZ) they do not appear on the display and I thus > believe do not transmit, thus no echo back from the ESP. SO, there is > something in the config of the ESP that is not happy. I have the terminal > and laptop set for 2400,7N1. > > The pins of the terminal are > 1 - ground > 2 - transmitted data > 3. - receive data > 4 - rts > 7 signal ground > 8 data carrier detector > 11 reverse channel transmit data > 12 reverse channel receive data > 18 read only data > 20 data terminal ready. > > I am working on this, but any tips would be appreciated. Do I need Mark > or Space parity? > > Bill >
