Pebble HF Web Firmware Updater

Baud rate (19200 = STK500v1 default / Arduino-as-ISP; 9600 for slow/legacy targets; 115200 for Optiboot) 9600 19200 38400 57600 115200 Toggle DTR/RTS to auto-reset the board before syncing (default ON — needed for Arduino bootloaders) Send STK_SET_DEVICE before entering programming mode (helps stricter bootloaders) Chip erase before writing (matches avrdude's default; required for Arduino-as-ISP / STK500 — flash must be erased before bits can be set) Auto-detect device from signature (reads the chip signature to set page size & flash size; aborts on an unknown chip. Uncheck to force ATmega328P settings) Read signature via raw ISP instruction (STK_UNIVERSAL) (like avrdude — a bootloader can't fake this, so it blocks accidentally flashing the programmer itself. Uncheck only when deliberately flashing through a bootloader, e.g. programmer recovery or putting ArduinoISP on an Uno) Verify flash after writing (mirrors avrdude's verify phase) Skip bootloader region — don't write/verify 0x7E00+ (for re-flashing a programmer through its own Optiboot at 115200: Optiboot can't rewrite itself, so a with_bootloader hex fails on the last pages unless they're skipped)