Oric_dan - firstly I checked the voltage between the Gnd and power leads of the FTDI cable and it is 5.46 volts. I changed the port settings to set RTS on close but still no successful upload. I then connected a series resistor and LED to “cable side of the 0.1 uF blocking cap” as per attached circuit diagram. The LED doesn’t light while the code is compiling then as it starts to try and upload, it briefly flashes on / off then comes back on while the code tries to upload. It then goes out when the
avrdude: stk500_getsync(): not in sync: resp=0x00
error displays. From my rudimentary electronics understanding does this mean that seeing as the LED on the RTX line has it’s anode to + 5V that the RTX line is low when the LED is illuminated ? Does any of this information help to ascertain what is happening here or could someone just point me to an online store, with reasonable postage rates to Australia, where I can purchase a FTDI cable that works out of the box, so to speak. Thanks again to you all, for your help, Pedro.
Sorry for the confusion - for the info I mentioned, I had the Led wired the other way around [and
I also used a MUCH larger series-R value], so it would work backwards to what you show in your
lefty brings up a good point about loading down the RTS/DTR line in the cable, but it worked just
fine for me with uploading sketches. I don't run it that way normally, but just wanted to indicate
what the operation of RTS versus DTR looks like, to help identify how your cable might be working.
[lefty seems to be my online "conscience", LOL].
Buying 3rd party stuff from who knows who and who knows where is always a crap-shoot. Worse,
that so many of these ebay sites don't provide anything in the way of real documentation. What's