Disappearing Key Assignments

[Sylvain Cote]

(01-02-2020 03:55 PM)cdmackay Wrote:  please forgive me going off-topic a little, but can you explain what the two sets of 8 LEDs denote, on the tester?
Is the left set of 8 looking in one direction, the right set in the other?

Yeah, I asked myself the same question when I received the tester, I am used to only have one set of LEDs.

After some experiments, I discovered that the lights were used as follow:

Code:

LEDS   Description   LEDS
0  1  1:DCD | 6:DSR  0  1
0  1  2:RXD | 7:RTS  0  1
0  1  3:TXD | 8:CTS  0  1
0  1  4:DTR | 9:RI   0  1

In my test, when both cables are plugged but no software is running the tester show this:

Code:

0  1   Description   0  1
X  -  1:DCD | 6:DSR  X  -
X  -  2:RXD | 7:RTS  X  - 
X  -  3:TXD | 8:CTS  X  -
X  -  4:DTR | 9:RI   -  -

note: X means LED is lighted on and - means LED is not lighted

When I start clupdate, then the tester show this:

Code:

0  1   Description   0  1
X  -  1:DCD | 6:DSR  X  -
X  -  2:RXD | 7:RTS  -  X
X  -  3:TXD | 8:CTS  X  -
-  X  4:DTR | 9:RI   -  -

Then I start the python test program, after the port is open I see:

Code:

0  1   Description   0  1
-  X  1:DCD | 6:DSR  -  X
X  -  2:RXD | 7:RTS  -  X
X  -  3:TXD | 8:CTS  -  X
-  X  4:DTR | 9:RI   -  -

Then the LEDs on RXD & TXD are moving back and forth from 0 to 1 when there is transmission going on.

Hope it clarify things a bit.

Sylvain

PS: Ian beat me to it