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Flash

Flash firmware to an ESP32 device

laurigates4 starsApr 6, 2026

Occupation: Electronics Engineers, Except Computer
Categories: Framework Internals

Skill Content

Flash Firmware to ESP32 Device

Flash compiled firmware to an ESP32 device. Flashing runs natively (not in container).

Parse Arguments

$ARGUMENTS may contain:

Project name (first word)
Serial port (second word, or auto-detected)

Available Projects

robocar-main or main, robocar-cam or cam
webserver, i2s-audio or audio, telegram
kids-audio, xbox, wifitest

Port Auto-Detection

Ports are auto-detected by tools/esp32.just:

USB-serial adapters (CH340/CP2102): ls /dev/cu.usbserial-*

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Flash

npx skills add laurigates/mcu-tinkering-lab

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Author: laurigates
stars: 4
Updated: Apr 6, 2026
Occupation

On this page

01Flash Firmware to ESP32 Device

ESP32-S3 native USB: detected by Espressif VID 0x303a

Override with: PORT=/dev/... just <module>::flash

Flash Commands

Based on $ARGUMENTS:

robocar-main: just robocar::flash-main
robocar-cam: just robocar::flash-cam
webserver: just webserver::flash
i2s-audio: just i2s-audio::flash
telegram: just telegram::flash
kids-audio: just kids-audio::flash
xbox: just xbox::flash
wifitest: just wifitest::flash

ESP32-CAM Note

For ESP32-CAM projects (robocar-cam, webserver, i2s-audio, telegram):

Remind the user: "Connect GPIO0 to GND before flashing"
After successful flash: "Disconnect GPIO0 from GND and reset the device"

Error Handling

If flashing fails:

Check if port exists and is accessible
Suggest checking USB connection
For permission errors, suggest: sudo chmod 666 /dev/xxx

02

Parse Arguments

03Available Projects

04Port Auto-Detection

05Flash Commands

06ESP32-CAM Note

07Error Handling

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