✨ Tiny Cheatsheet Summary

Purpose	Arduino CLI Command
Setup CLI	arduino-cli config init
Install board core	arduino-cli core install esp32:esp32
Create sketch	arduino-cli sketch new MySketch
Compile sketch	arduino-cli compile --fqbn <FQBN> ./MySketch
Upload to board (USB)	arduino-cli upload -p /dev/ttyUSB0 --fqbn <FQBN> ./MySketch
Install library	arduino-cli lib install "ArduinoJson"
List boards	arduino-cli board listall
List installed libraries	arduino-cli lib list



🛠 Arduino CLI — Most Useful Commands

Purpose	Command	Notes
Initialize CLI config	arduino-cli config init	Creates arduino-cli.yaml
Set libraries/sketch folder	arduino-cli config set directories.user ~/Arduino	Configure custom folders if needed
Update board index	arduino-cli core update-index	Updates list of available board packages
Add board package URL	arduino-cli config add board_manager.additional_urls <URL>	Example: ESP32 board URL
Install board package	arduino-cli core install esp32:esp32	Install core for ESP32, Heltec, etc.
List installed cores	arduino-cli core list	Show installed board platforms
List available boards	arduino-cli board listall	Find correct FQBN
Create a new sketch	arduino-cli sketch new SketchName	Auto-create .ino file and folder
Compile a sketch	arduino-cli compile --fqbn <FQBN> /path/to/sketch	Builds .bin, .elf, .hex files
Export binary to specific folder	arduino-cli compile --fqbn <FQBN> --output-dir ./build /path/to/sketch	Save compiled .bin neatly
Upload to board	arduino-cli upload -p /dev/ttyUSB0 --fqbn <FQBN> /path/to/sketch	Flash sketch to connected device
Install a library	arduino-cli lib install "LibraryName"	Like arduino-cli lib install "ArduinoJson"
Install library from GitHub	git clone <repo-url> ~/Arduino/libraries/LibraryName	For non-indexed libraries
Update library index	arduino-cli lib update-index	Good to run before installing
List installed libraries	arduino-cli lib list	Shows your libraries
Show CLI version	arduino-cli version	Check current Arduino CLI version
Upgrade CLI	Download latest release manually from Arduino CLI GitHub



mosquitto_sub -h localhost -p 1883 -t "#" -v
mosquitto_pub -t esp32 -m "{\"cmd\": \"fota\", \"id\": \"test-123\"}"


arduino-cli board details -b esp32:esp32:XIAO_ESP32S3