platformio/platformio-core

Neovim + Arduino + PlatformIO

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#5,188 opened on Jun 24, 2025

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Description

Hello,

I am working on a project that uses the arduino framework, and I am having issues running clangd/arduino-language-server LSP's on my .ino project file.

This may be the completely wrong place to post such questions but maybe someone here has a solution?

The problem lies with needing to run the arduino cli in order to get lsp support for an .ino file that contains arduino specific code, that is not available in the pio cli.

This forum post perfectly outlines my issue: https://community.platformio.org/t/using-arduino-language-server-with-platformio-in-neovim-possible/44134

This is the error I get upon trying to load the arduino language server [START][2025-06-24 09:11:36] LSP logging initiated [ERROR][2025-06-24 09:11:36] ...p/_transport.lua:36 "rpc" "arduino-language-server" "stderr" "09:11:36.503010 Path to ArduinoCLI config file must be set.\n"

Contributor guide

Research direction
Investigate how to configure the Arduino language server to work with PlatformIO in Neovim. The key issue is that the Arduino CLI config file path must be set. Look into PlatformIO's documentation for Arduino specific LSP setup, possibly using the Arduino CLI in conjunction with PlatformIO.
Tech stack
None
Domain
developer experiencetooling
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
NeovimArduino CLIPlatformIO
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65