Issue with programming, maybe faulty hardware? (not the normal problems)
I purchased several of these boards (from your Aliexpress shop) and I have had a few I cannot program.
Basically, when I plug the units in that I cannot program, I see the Red Power led but NO BLUE Led (the successful ones I could program, when first plugged in had the Red power LED on and the blue led was faintly on). The PC registers the unit and can see a valid Com Port but that is all. Trying to program them (with various different software and cables) just shows the usual timeout error. I have jumpered GIO0 and Ground, still does not work. I have noticed with the ones that I have programmed, I had to press BOOT at the time of programming. I have also tried that with the ones that are failing, and they still dont work.
Do you have any ideas on how I can test these boards to see what the problem is?
It seems they might have not been programmed with any bootloader, or base firmware.
Any progress hier ?? My order is now here and I have the same Problems.