switched from Mason + mason-lspconfig to custom install

lua/lsp/arduino.lua

@@ -1,5 +1,6 @@
 
-vim.lsp.config("arduino_language_server", {
+---@type vim.lsp.Config
+local config = {
     cmd = {
         "arduino-language-server",
         --"--fqbn",
@@ -9,5 +10,22 @@ vim.lsp.config("arduino_language_server", {
         "arduino",
         "cpp",
     },
-})
+    root_dir = function (bufnr, on_dir)
+        local fname = vim.api.nvim_buf_get_name(bufnr)
+        on_dir(vim.fs.dirname(vim.fs.find({ vim.fn.fnamemodify(fname, ':r') }, { type = "directory", upward = true })[1]))
+    end,
+    capabilities = {
+        textDocument = {
+            ---@diagnostic disable-next-line: assign-type-mismatch
+            semanticTokens = vim.NIL,
+        },
+        workspace = {
+            ---@diagnostic disable-next-line: assign-type-mismatch
+            semanticTokens = vim.NIL,
+        },
+    },
+}
+
+vim.lsp.config['arduino_language_server'] = config
+vim.lsp.enable('arduino_language_server')