Service Forum

Victor, I think that cable I had was inverted in more ways then only pin 1/2

When I was connected to it I tried many different combinations.
And for example, if I reversed the DTR and CTS cables, ...

It worked!

That crossover serial cable was indeed the problem.
I cut one end and created a female adapter out of it Smile

Connected that to the pc and my circuit, checked the volatges and this is ...

I think I found the problem.
That 10ft female/female serial cable seems to be a crossover cable.

Label on cable's bag says "DB9 Null Modem Cable F/F-10FT"

According to my research on ...

Here are some voltage results from the DB9 connection directly, no circuit attached. (Itester's invert box NOT checked)
PC com1 -> 10ft female/female cable -> male adapter
( i don't have a fem ...

start -> run -> cmd

cd c:\allservice\24rf08

and then then 24rf08 dumb.bin

Update:

I've tried the circuit on 4 different computer:

PC 1, 2 and 3 get the same voltage results:
(I've only tried the reader program on PC1. Not bothering on pc2 and pc3 because the same vol ...

I've redone the circuit and mirrored the DB9 connection.
I then tested with the voltmeter and got the following results:

===========
Black lead = GND
Red lead = SDA

itester 0 = +3.00V
iteste ...

Victor, as stated in my previous post, I got a Female/Female cable.
One end is connected to the computer and the second in a male DB9 adapter.
I must say that the numbering on the Female DB9 *matche ...

Victor, thank you for your reply.

I don't understand how the DB9 can be badly wired.
I've soldered the corresponding numbers exactly as on your diagram.
If you look at the second picture of my DB ...

Hello there,

First of all I'd like to thank you for making this information public, and for writing the software Smile

I however do have a problem with making it work. Every time (and god knows I'v ...