I started using this mode but it seems something is not working right.
The problem occurs after I typed in the first double-quote in the same line as #include.
something is runnung a infinite loop but no idea. (searching the library path?)
I've tested with Abbrev, gtags and doxymacs turned off but the same things happen.

Ubuntu 12.04LTS, emacs 23.3.1
grabbed the latest arduino-mode from github,
related code snipplets in emacs:

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;; doxymacs

(lazyload 'doxymacs-mode "doxymacs")
(lazyload 'gtags-mode "gtags")
(add-hook 'c-mode-common-hook
          '(lambda()
             (gtags-mode 1)
             (gtags-make-complete-list)))

(add-hook 'c-mode-common-hook 'doxymacs-mode)
(add-hook 'c++-mode-hook 'doxymacs-mode)

(defun bind-m-ret-to-comment-line ()
  (define-key c-mode-map (kbd "<M-return>") 'c-indent-new-comment-line))
(add-hook 'c-mode-hook 'bind-m-ret-to-comment-line)
(add-hook 'c++-mode-hook 'bind-m-ret-to-comment-line)
(defun my-doxymacs-font-lock-hook ()
    (if (or (eq major-mode 'c-mode) (eq major-mode 'c++-mode))
        (doxymacs-font-lock)))
(add-hook 'font-lock-mode-hook 'my-doxymacs-font-lock-hook)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;; Arduino mode

(add-to-list 'load-path (site "arduino-mode/"))
(add-to-list 'auto-mode-alist
         '("\\.\\(pde\\|ino\\)$" . arduino-mode))
(lazyload 'arduino-mode "arduino-mode")

Just curious since it's been 10 months since the last update.

I wanted to add it to MELPA

Steps to reproduce:

emacs -Q

Evaluate the following code to load arduino-mode and no other packages:

(require 'package)
(setq package-load-list
      '((arduino-mode t) ))
(package-initialize)

Turn on mode with M-x arduino-mode.

The following errors appear in Messages, and the mode doesn't start:

Eval error in the ‘c-lang-defconst’ for ‘c-constant-kwds’ in arduino-mode:
Eval error in the ‘c-lang-defconst’ for ‘c-basic-matchers-before’ in arduino-mode:
Eval error in the ‘c-lang-defconst’ for ‘c-matchers-2’ in arduino-mode:
c-get-lang-constant: Invalid function: (append (quote ("HIGH" "LOW" "INPUT" "OUTPUT" "INPUT_PULLUP" "LED_BUILTIN" "true" "false")) (c-get-lang-constant (quote c-constant-kwds) (quote (cc-langs))))

Emacs:
GNU Emacs 25.0.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.6) of 2015-12-29

arduino-mode (from melpa):
;; Package-Version: 20151017.2335
;; Version: 1.0

When upgrading arduino-mode today, noticed the following compilation error:

Compiling file /Users/dpc/.emacs.d/elpa/arduino-mode-20180508.438/arduino-mode.el at Tue May  8 12:47:19 2018
arduino-mode.el:35:1:Error: Cannot open load file: No such file or directory, spinner

arduino-mode.el

;;; Code:
(require 'cc-mode)
(require 'spinner)

define LedOn digitalWrite

then it freeze at spacebar hit time

Hi all,

I am having a bit of problem running this mode.
I put arduino-mode.el in this folder ~/.emacs/vendor/arduino-mode.el
I added following line in my .emacs files:

(add-to-list 'load-path "~/.emacs.d/vendor/arduino-mode")
(setq auto-mode-alist (cons '(".(pde|ino)$" . arduino-mode) auto-mode-alist))
(autoload 'arduino-mode "arduino-mode" "Arduino editing mode." t)

But it failed to open, I tried to modify first line to:

(add-to-list 'load-path "~/.emacs.d/vendor/arduino-mode.el")

it's still not working, I tried to enable the mode manually by doing M-x arduino-mode. It gives out this error message:

Cannot open load file: arduino-mode

Any idea what's went wrong?

Thanks

Here is the error output in *Messages*:

Eval error in the `c-lang-defvar' or `c-lang-setver' for `c-known-type-key' (source eval): (wrong-type-argument sequencep t)
Error during redisplay: (jit-lock-function 542) signaled (wrong-type-argument stringp nil)

Since it is the oficial one, the interface looks less troublesome than setting up arduinomk. I've been a week trying to make it work but can't compile nor upload files. Arduino-cli seems pretty robust. Is this project still maintained?

When I load arduino-mode with use-package (use-package arduino-mode). I got this error:

+BEGIN_EXAMPLE

(invalid-function (append '("HIGH" "LOW" "INPUT" "OUTPUT" "INPUT_PULLUP" "LED_BUILTIN" "true" "false") (c-get-lang-constant 'c-constant-kwds '(cc-langs))))
signal(invalid-function ((append '("HIGH" "LOW" "INPUT" "OUTPUT" "INPUT_PULLUP" "LED_BUILTIN" "true" "false") (c-get-lang-constant 'c-constant-kwds '(cc-langs)))))
c-get-lang-constant(c-matchers-2 (cc-fonts) arduino-mode)
(defconst arduino-font-lock-keywords-2 (c-get-lang-constant 'c-matchers-2 '(cc-fonts) 'arduino-mode) ("/home/stardiviner/.emacs.d/elpa/arduino-mode-20151017.2335/arduino-mode.elc" . 2383))
#(arduino-mode nil noerror)
ad-Advice-require(# arduino-mode nil noerror)
apply(ad-Advice-require # (arduino-mode nil noerror))
require(arduino-mode nil noerror)
(not (require 'arduino-mode nil 'noerror))

+END_EXAMPLE

When I use (require 'arduino-mode), got this error:

+BEGIN_EXAMPLE

c-get-lang-constant: ‘c-matchers-2’ got no (prior) value in arduino-mode (might be a cyclic reference)

+END_EXAMPLE

My Emacs version: 25.1.50.5

I don't know how but completions never work
company-arduino was always installed but completions don't work at all.

Switching to c++-mode completions work wonderfully, but then back to arduino mode and it is gone again.

I am unable to even guess what the problem can be.

In arduino-mode the keymap is set as (use-local-map c-mode-map) so it doesn't actually use the arduino-mode-map.
This makes it impossible to define arduino specific keys.
The code should really be (use-local-map arduino-mode-map)

I kinda think this mode should probably have been created using define-derived-mode instead of the template from http://cc-mode.sourceforge.net/derived-mode-ex.el

It looks like arduino-mode uses cl-macroexpand-all which has been deprecated in favor of macroexpand-all so I'm getting this error "Symbol's function definition is void: cl-macroexpand-all" when I try to install it. See http://emacs.stackexchange.com/questions/2864/symbols-function-definition-is-void-cl-macroexpand-all-when-trying-to-instal. I am using emacs 24.4.