Help programming ESC32

[Skripo]

Do the boot bars need to remain shorted or only on boot?

[chschmid]

[Skripo]

Kept shorted and it said,:

Connecting to ESC32...

Serial link connected. Attemtping bootloader mode...

Failed to enter bootloader mode.

Is there any chance the boot loader is corrupt? Isn't hardcoded in the STM32?

Maybe I need to kill the amega328 on the Arduino Nano in case it alters I/O?

[Kisssys]

Bootloader is is hard coded. May be the Atmega goofing it up.

[Skripo]

Thats my take. It connects fine but sending commands to atmega rather than FTDI

There is a way to force constant reset to disable atmega, will try that. A sketch would have been nice but I'm not a programmer.

[JussiH]

You are saying that you loaded ArduinoISP, right?

ArduinoISP is solely for "In System Programming" of AVR (Atmel) chips, and thus it wont work as a USB to Serial converter.

AFAIK, there no way to use a 328-based arduino as a serial adapter. The small duinos only have 1 hardware serial and its already in use when you connect to the Arduino IDE. You may be able to use an Arduino mega since it has 4 serials.

[Kisssys]

I think he understands what's going on, as I mentioned early on if you don't know what your doing you can cause harm. I just Flashed 2.0v49 using the FTDI part of a nano. I'm brave and used a 5 volt nano just to see if the pins are in fact 5 volt tolerant. I had to connect on the FTDI side of the 1k isolation resistors. If you don't have the resistors on the board, mine is in a 4 resistor package then your out of luck.

[Skripo]

Could you share some more info and help me identify what pins the ones you mention are so I can check for resistors?

Thanks.

[Kisssys]

If this doesn't make sense to you then you should probably wait until you get a proper FTDI cable. You should use a 3v3 nano or put 1k resistors in series with the TX and RX lines to insure you are 3v3 volt safe and if you reverse them you will do no harm.

I drew the black lines to make it obvious those points are connected.

[Skripo]

I was using 5v.

Place opens tomorrow and seeing the day is shot I will get it tomorrow if mine does not show up. Which ftdi do you recommend? Basic 3v basic 5v or basic friendly?