Language sever unable to locate libraries in the $HOME/Arduino/libraries directory

[tomhepworth]

I have the standard configuration of arduino-language-server in neovim.

The line #include <Wire.h> gives me a "file not found" error. The same with other libraries. I have generated a compile_commands.json with arduino-cli but this does not make any difference.

Is there a way to pass include paths to the language server?

My configuration:

local DEFAULT_FBQN="arduino:avr:uno"

local MY_FQBN = DEFAULT_FBQN

print(MY_FQBN)

require'lspconfig'.arduino_language_server.setup{
    cmd = {
        "arduino-language-server",
	"-clangd",
	"/usr/local/bin/clangd",
 	"-cli", 
	"/usr/local/bin/arduino-cli",
        "-cli-config",
	"/home/.../thomas.hepworth/.arduino15/arduino-cli.yaml",
        "-fqbn",
        MY_FQBN
    }
}

[nabakolu]

I do have the same problem.
But including your libraries (which are 'file not found'), then compiling once with arduino-cli fixes this for me.

[justin4480]

Same issue here. In my case, it was caused by my Neovim configuration being set to "Arduino Uno" (arduino:avr:uno) while working on an "Arduino UNO R4 WiFi" (arduino:renesas_uno:unor4wifi) project that uses UNO R4 specific libraries (like WiFiS3.h). The board mismatch causes the language server to fail when it can't find the required libraries for the specified FQBN.

For now, I'm manually toggling between different FQBN values by commenting/uncommenting the appropriate lines in my LSP configuration until I can implement a more elegant per-project board selection solution.

      local servers = {
        arduino_language_server = {
          capabilities = {
            textDocument = {
              semanticTokens = vim.NIL,
            },
            workspace = {
              semanticTokens = vim.NIL,
            },
          },
          cmd = {
            'arduino-language-server',
            '-clangd', '/usr/bin/clangd',
            '-cli', '/usr/local/bin/arduino-cli',
            '-cli-config', vim.fn.expand '~/.arduino15/arduino-cli.yaml',
            -- '-fqbn', 'arduino:avr:uno',
            '-fqbn', 'arduino:renesas_uno:unor4wifi',
            -- '-fqbn', 'arduino:mbed_giga:giga',
            '-log',
          },
          filetypes = { 'arduino' },
        },