Hello, thanks ... again
I developed a board just for upload bootloader and initial sketch (before soldering to te actual board), very simple, inspired by this guy & video
But, I just used a FTDI module not the AVRISP MKII. Please note that I needed to use a module with (I guess) an original FTDI ft232rl. Cheap chinese (those red ones) won't work for me, even to upload sketches to ESP's , the chinese module gives me troubles and inconsistences
I can see slight difference in on voltage level for pin17, all showing 5.01v, pin17 has 4.08v, don't know why. Also Have filter capacitors on all Vcc/Gnd
I haven't a scope, witing for a DS0138, hope it helps me, but I don't know how to use it
Please note the board an IC, are working. The initial sketch is running ok and all communication and expected functionallities are ok, it's just I can't upload my new sketches ... development stopped
I'll comment any advance
Thank you !!