Main.cpp:1:10: fatal error: Arduino.h: No such file or directory

letifer · April 28, 2025, 8:47am

Every time I run the code I get this error main.cpp:1:10: fatal error: Arduino.h: No such file or directory . I am newbie, your help is very much appreciated.

sivar2311 · April 28, 2025, 9:06am

What’s the content of the platformio.ini?
Please use pre-formatted text, not image!

letifer · April 28, 2025, 10:11am

My platformio.ini content(I use a Arduino board):

[env:uno]
platform = atmelavr
board = uno
framework = arduino

sivar2311 · April 28, 2025, 10:26am

Where does this text come from??

Did you use the build button in the bottom bar?

letifer · April 28, 2025, 1:42pm

That text is the directory of the main.cpp file stored in my computer.
When I click build button I get this:

Executing task: C:\Users\iniya\.platformio\penv\Scripts\platformio.exe run --environment uno 

Processing uno (platform: atmelavr; board: uno; framework: arduino)
------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/uno.html
PLATFORM: Atmel AVR (5.1.0) > Arduino Uno
HARDWARE: ATMEGA328P 16MHz, 2KB RAM, 31.50KB Flash
DEBUG: Current (avr-stub) External (avr-stub, simavr)
PACKAGES: 
 - framework-arduino-avr @ 5.2.0 
 - toolchain-atmelavr @ 1.70300.191015 (7.3.0)
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 5 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Checking size .pio\build\uno\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [          ]   0.4% (used 9 bytes from 2048 bytes)
Flash: [          ]   2.9% (used 936 bytes from 32256 bytes)
================================================ [SUCCESS] Took 1.49 seconds ================================================
 *  Terminal will be reused by tasks, press any key to close it.

sivar2311 · April 28, 2025, 1:44pm

So, everything worked correctly. There is no error at all.

letifer · April 28, 2025, 2:00pm

In the step of pasting the path for the binary file, below:

[wokwi]
version = 1
firmware = 'path-to-your-firmware.hex'
elf = '.pio\build\uno\firmware.elf'

I couldn’t find the path for binary file alone.

 *  Executing task: C:\Users\iniya\.platformio\penv\Scripts\platformio.exe run --environment uno 

Processing uno (platform: atmelavr; board: uno; framework: arduino)
------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/uno.html
PLATFORM: Atmel AVR (5.1.0) > Arduino Uno
HARDWARE: ATMEGA328P 16MHz, 2KB RAM, 31.50KB Flash
DEBUG: Current (avr-stub) External (avr-stub, simavr)
PACKAGES: 
 - framework-arduino-avr @ 5.2.0 
 - toolchain-atmelavr @ 1.70300.191015 (7.3.0)
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 5 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Checking size .pio\build\uno\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [          ]   0.4% (used 9 bytes from 2048 bytes)
Flash: [          ]   2.9% (used 936 bytes from 32256 bytes)
================================================ [SUCCESS] Took 1.50 seconds ================================================
 *  Terminal will be reused by tasks, press any key to close it.

sivar2311 · April 28, 2025, 3:43pm

Even this is a totally different topic, the file is in the exact same directory (after build):

[wokwi]
version = 1
firmware = '.pio\build\uno\firmware.hex'
elf = '.pio\build\uno\firmware.elf'

letifer · April 28, 2025, 3:47pm

I tried with the path you mentioned for hex, it says:

Wokwi: firmware binary .pio\build\uno\firmware.hex not found in workspace

I checked the path, both the binary and .elf files are present but I still get this error

sivar2311 · April 28, 2025, 7:08pm

Where is your wokwi.toml file located?
The paths to the firmware and elf file are relative to the location of the wokwi.toml file.

Example:

Filestructure:

.
├── .pio
│   └── build
│       └── uno
│           ├── firmware.elf
│           └── firmware.hex
├── .wokwi
│   ├── diagram.json
│   └── wokwi.toml
├── src
│   └── main.cpp
└── platformio.ini

wokwi.toml

[wokwi]
version = 1
firmware = '../.pio/build/uno/firmware.hex'
elf = '../.pio/build/uno/firmware.elf'

letifer · April 29, 2025, 4:25am

Thanks this worked. <3