Originally Posted by bengtb
I am trying to flash a "" HobbyKing XP 3A 1S 0.7g Brushless Speed Controller"" using a "Afro usb programmer" Separate power to the esc but still get the error message:
" Stk500v2 Connection to esc at com 9 failed!
(error:"CMD_SIGN_ON: read Timeout (no answer)" "
what am I doing wrong?
Your ESC has a Silabs chip so will likely need to use an Arduino in C2 mode for the initial flash.
If you download and read the manual that comes with BLHeli suite called 'BLHELI programming adapters' it explains more.
Here is a video of the process for initial flashing with an Arduino then later flashing via the bootloader.