YMODEM XMODEM Integration

Overview

Use this skill for serial file-transfer protocols in bootloaders or maintenance consoles. Separate transport reliability, packet parsing, CRC/checksum, flash layout, and update safety before writing firmware to flash.

When To Use

Use this skill when:

• The user wants to add or debug XMODEM/YMODEM firmware update over UART, USB CDC, or shell.
• Transfers timeout, abort, fail CRC, write wrong file size, brick after update, or hang at C/NAK negotiation.
• The task involves bootloader app download, serial protocol state machines, packet size, CRC16, SOH/STX/EOT/CAN, or flash programming.

Do not use this skill for general serial logging. Use embedded-serial-log-debug first if RX/TX is unreliable.

First Questions

Ask for: