This is the time that tries men's souls. Google says I need permission to see that photo.
Using the *correct* serial port (25 pin) - which are the two holes to shunt? o o o o o o o o o o o o o o o o o o o o o o o o o Viewed staring directly at the holes in the port. Tom M. On Fri, Apr 5, 2019 at 5:44 PM John R. Hogerhuis <[email protected]> wrote: > > > On Fri, Apr 5, 2019 at 2:19 PM Thomas Morehouse <[email protected]> > wrote: > >> "Check your USB-Serial cable first. That's the USB cable with a DB-9 male >> RS232 connector. Plugged to the PC. No cables connected to it. >> >> Type in TeraTerm. Question: Do you see any characters? If so, you have >> echo on. If not, echo is off. Go into TeraTerm settings and turn echo on, >> and try again until you see the characters you type." >> >> OK - only the usb/serial cable, plugged into usb port of laptop. No >> characters appear. Change TeraTerm Terminal (VT100) to Echo. Characters >> appear. >> >> Next step: >> >> "Short pin 2 to pin 3 on the DB-9. >> >> Type in TeraTerm. >> >> If you see only see one character per keypress, the adapter fails the >> test. If you see 2 characters per test (one for the echo, and one >> transiting the cable) then it passes the test." >> >> I shorted 2 and 3 on the DB9 end of the usb/serial cable, while cable is >> still plugged into usb port. >> >> I typed one character. One character appeared on laptop screen. >> >> > > > >> Seems strange the 2 - 3 shunt on the 102 pins would fail loopback test >> *and* the 2 - 3 shunt on the cable fails the test on the laptop also. >> >> > Well we know why that is, because you were using the barcode port. Could > you try a simple loopback again on the M100 to confirm no issue? > > I've seen very few failed M100 RS232C ports. > > Here's a picture of my silly loopback on the m100. Just a male DB25 > connector plus a paper clip. Only because I don't want to risk damaging the > M100 connector by shoving the wrong gauge wire into it. > > m100_loopback.jpg > <https://drive.google.com/file/d/1B5CNzk_1-T8HTtxrDu9UJPd83t6l0CoO/view?usp=drive_web> > > > -- John. > >
