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Convert WXB to HEX

Verified by Adam B.· reviewed by FE Editorial ·updated Jul 16, 2026
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Is it possible to convert WXB to HEX?
Yes - WXB converts to HEX.

watchX Blocks generates Arduino source from your blocks; save that as a .ino sketch, then compile it in the Arduino IDE with Sketch > Export Compiled Binary, or with arduino-cli compile --fqbn ... --export-binaries sketch.ino, which writes the .hex. You must select the correct watchX board (an ATmega32U4 / Leonardo-class target) and have its libraries installed or compilation will fail.

Also to HEX: UF2 · S19 · INO

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert WXB to HEX?

A .hex file is the compiled machine-code firmware that actually gets flashed to the watchX microcontroller, whereas .wxb is only a block-based project, so the conversion is really a compile step through Arduino code.

How to convert WXB to HEX

Arduino IDE (Export Compiled Binary) FREE

Take the Arduino code from watchX Blocks, save it as a .ino, select the watchX board, then use Sketch > Export Compiled Binary to write the .hex into the sketch folder.

Arduino CLI OPEN-SOURCE

Run arduino-cli compile --fqbn arduino:avr:leonardo --export-binaries sketch.ino to produce the .hex (adjust the FQBN to the watchX board).

About these formats

.WXB watchX Blocks Development Project

A .wxb file is a project saved by watchX Blocks, the block-based coding editor for the watchX Arduino-compatible wearable. It is an XML document that stores the connected code blocks of a…

Open .WXB details →
.HEX Intel HEX File

A .hex file is an Intel HEX file: compiled firmware for a microcontroller such as an Arduino, AVR, or PIC chip, stored as plain-text records. You don't run it on a PC - you flash it to the…

Open .HEX details →

Quality & what to watch

  • There is no one-click .wxb to .hex export; you must first get the Arduino .ino code and then compile it.
  • Compilation only succeeds with the correct board (watchX is ATmega32U4-based) and any required watchX/Arduino libraries installed.
  • The .hex is specific to that board and toolchain version; it will not run on unrelated microcontrollers.

Frequently asked questions

Can watchX Blocks output a .hex directly?
No. It produces Arduino source; you compile that in the Arduino IDE or CLI to get the .hex.
Which board should I select?
watchX is based on the ATmega32U4 (Leonardo-class), so pick the matching Arduino AVR board before compiling.
Why does Export Compiled Binary produce two .hex files?
Arduino often exports one .hex with the bootloader and one without; flash the plain sketch .hex in normal use.
Do I even need the .hex to run my code?
Not usually. The IDE's Upload button compiles and flashes in one step; you only need the .hex for manual flashing or archiving.