ARDUINO-LANGUAGE-SERVER(1)

💖 ARDUINO-LANGUAGE-SERVER 💖

okay bestie, this is the manual page for arduino-language-server, part of the General Commands Manual crew. Yes it's a command, yes it lives in your terminal, but no, it's not really for you. Plot twist incoming 👇

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✨ NAME ✨

arduino-language-server — the Arduino Language Server, built on Clangd, here to serve you that sweet, sweet code autocompletion 🍓

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🌈 SYNOPSIS 🌈

arduino-language-server [OPTION]...

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💅 DESCRIPTION 💅

so here's the tea, and I need you to hear me on this one: this language server is NOT meant to be used directly by humans from the command line terminal. like, at all. that's not its vibe. its whole purpose — its main character moment — is to hand C++/.ino language functionality over to your IDEs. so basically, it's the IDE that talks to the language server, over stdin/stdout, using the slightly modified JSONRPC protocol laid out in the LSP specification. iykyk 🧚

to actually get the language server started, you need an arduino-cli(1) config file. no config, no server, that's the rule. and bestie, making one is so easy, you literally just run:

arduino-cli config init

periodt. ✨

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👑 OPTIONS 👑

one bullet per flag, no skipping, we're thorough in this house 💜

• -board-name string — the user-friendly board name to start out with. and yes, it can be changed via JSON-RPC later, so don't stress about locking it in 🎀
• -clangd string — path to the clangd executable
• -cli string — path to the arduino-cli executable
• -cli-config string — path to the arduino-cli config file
• -cli-daemon-addr string — the TCP address and port of the Arduino CLI daemon (for example: localhost:50051)
• -cli-daemon-instance int — instance number of the Arduino CLI daemon (default -1)
• -format-conf-path string — path to the global clang-format configuration file
• -fqbn string — the fully qualified board name to start out with. also can be changed via JSON-RPC, so flexible queen 💅
• -jobs int — max number of parallel jobs. Default is 1. Use 0 to match the number of available CPU cores. (default -1)
• -log — enable logging to files 🗂️
• -logpath string — where to write those logging files to when logging is enabled (default ".")
• -no-real-time-diagnostics — disable real time diagnostics
• -skip-libraries-discovery-on-rebuild — skip libraries discovery on rebuild. it'll make rebuilds faster, but heads up: it will fail if the used libraries changes. so like, tradeoffs, bestie 😭

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🌸 SEE ALSO 🌸

arduino-cli(1), clangd(1)

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that's the whole page, bestie. this is arduino-language-server version 0.8.0-rc.1, dated 2026-08-14 — go forth and let your IDE do the talking 🫶💖✨