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Arduino Firmata protocol implementation on Ruby

Home Page: http://shokai.github.io/arduino_firmata

License: MIT License

Ruby 100.00%

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arduino_firmata's Issues

10 second delay before using Arduino Mega 2560

I have an Arduino Mega 2560 and whenever using this library, I have to wait 10 seconds after connecting before sending any commands.
I've been testing with a simple LED on pin 10 and using digital_write(10, true). If I write within the first 10 seconds after connect, nothing happens. Also If I write at the 9th second, I have to wait 10 more seconds before it will respond. Basically it requires 10 seconds of silence after connect before it will start working.

However by removing the following code in arduino.rb line 54, it only requires a 1 second delay.

  (0...6).each do |i|
    write(REPORT_ANALOG | i)
    write 1
  end
  (0...2).each do |i|
    write(REPORT_DIGITAL | i)
    write 1
  end

I'm not sure exactly why this occurring, or why that code is there, but if it's causing such a huge delay, perhaps it should be removed, or at least made optional.

use eventmachine

more performance

use bundler gem template

newgem -> bundler

Process never exits

Whenever my process which is using ArduinoFirmata tries to exit gracefully, it never exits because ArduinoFirmata is stuck.

When I do a CTRL+C, the last few lines of the trace are:

/usr/local/firmata-server/vendor/bundle/ruby/1.9.1/gems/arduino_firmata-0.3.7/lib/arduino_firmata/arduino.rb:85:in `sleep': Interrupt
    from /usr/local/firmata-server/vendor/bundle/ruby/1.9.1/gems/arduino_firmata-0.3.7/lib/arduino_firmata/arduino.rb:85:in `block in close'
    from /usr/local/firmata-server/vendor/bundle/ruby/1.9.1/gems/arduino_firmata-0.3.7/lib/arduino_firmata/arduino.rb:81:in `loop'
    from /usr/local/firmata-server/vendor/bundle/ruby/1.9.1/gems/arduino_firmata-0.3.7/lib/arduino_firmata/arduino.rb:81:in `close'
    from /usr/local/firmata-server/vendor/bundle/ruby/1.9.1/gems/arduino_firmata-0.3.7/lib/arduino_firmata/arduino.rb:34:in `block in initialize'

When I add some debugging code to arduino.rb:82, it shows that @serial.closed? == true and @thread_status == true.
Looking through the code I would guess that the process_input thread is stuck on line 195 doing a blocking read. So it it never returns from line 41 to see that @status has been change to Status::CLOSE.

I personally don't see why it needs the at_exit do close end. It'll get closed automatically when the process exits. So perhaps the solution would be to remove that.

set pin_mode before analog_read

arduino.pin_mode 0, ArduinoFirmata::ANALOG

arduino.analog_read 0

arduino.on :analog_read do |pin, value|
  puts "analog pin #{pin} changed #{value}"
  arduino.analog_write 11, value if pin == 0
end

debouncing of on :analog_read

it makes too many callbacks.

arduino.on :analog_read do |pin, value|
  if pin == 0
    puts "analog pin #{pin} changed : #{value}"
  end
end

Continuous reading from analog pin gets the same value

Hi,

I'm trying to get the value of a sensor on regular intervals. I try running this simple code

require "arduino_firmata"
arduino = ArduinoFirmata.connect "/dev/ttyACM0"
5.times do
   puts arduino.analog_read(1)
   sleep 5
end
arduino.close

but I get the same value regardless how the conditions for the sensor change.
If I put the arduino initialisation and close within the loop it works, but this is far from optimal way of doing it. I'd like to be able to initialise the object and work with it for a while before closing.

I'm running it with Firmata 2.4.0 on a raspberry pi.

Any ideas?

Thanks,
Kamen

close serialport on ArduinoFirmata#Arduino disposed

closed stream (IOError) on Raspberry Pi

/home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:65:in `close': closed stream (IOError)
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:65:in `close'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:31:in `initialize'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:58:in `call'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:58:in `sleep'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:58:in `initialize'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:56:in `loop'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/arduino.rb:56:in `initialize'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/main.rb:14:in `new'
        from /home/sho/src/ruby/arduino_firmata/lib/arduino_firmata/main.rb:14:in `connect'
        from samples/led_blink.rb:6

windows support

analog_read(6~9) on Arduino Micro

current

(0...6).each do |i|
  write(REPORT_ANALOG | i)
  write 1
end

set number of Analog ports when connect.

Weird Error

When I run a simple script:

require 'rubygems'
require 'arduino_firmata'

arduino = ArduinoFirmata.connect
arduino.digital_write 13, true
sleep

I get:

/var/lib/gems/1.9.1/gems/arduino_firmata-0.2.3/lib/arduino_firmata/arduino.rb:163:in `write_nonblock': Resource temporarily unavailable - write would block (Errno::EAGAIN)

Somehow if I execute the scripts too quickly i get the error, but if I wait then the error vanishes and works, how can I fix this?

[Arduino] Serialport not open

i use arduino & node-red and
error message was broke out.

Welcome to Node-RED

5 Sep 13:51:45 - [red] Version: 0.8.1
5 Sep 13:51:45 - [red] Loading palette nodes
js-bson: Failed to load c++ bson extension, using pure JS version
5 Sep 13:51:46 - ------------------------------------------
5 Sep 13:51:46 - [red] Failed to register 1 node type
5 Sep 13:51:46 - [red] Run with -v for details
5 Sep 13:51:46 - ------------------------------------------
5 Sep 13:51:46 - [red] Server now running at http://127.0.0.1:1880/
5 Sep 13:51:46 - [red] Loading flows : ardu.json
5 Sep 13:51:46 - [red] Starting flows
5 Sep 13:51:46 - [log] [inject:tick] repeat = 500
5 Sep 13:51:59 - [red] Stopping flows
5 Sep 13:51:59 - [log] [inject:tick] inject: repeat stopped
5 Sep 13:51:59 - [red] Starting flows
5 Sep 13:51:59 - [log] [inject:tick] repeat = 500
5 Sep 13:51:59 - [log] [arduino-board:2b3d7067.ab8f5] port closed
5 Sep 13:51:59 - [red] Uncaught Exception:
5 Sep 13:51:59 - Error: Serialport not open.
at SerialPortFactory.SerialPort.write (/home/yuby/node-red-0.8.1/node_modules/arduino-firmata/node_modules/serialport/serialport.js:202:17)
at ArduinoFirmata.module.exports.ArduinoFirmata.write (/home/yuby/node-red-0.8.1/node_modules/arduino-firmata/lib/arduino-firmata.js:165:30)
at null. (/home/yuby/node-red-0.8.1/node_modules/arduino-firmata/lib/arduino-firmata.js:131:24)
at wrapper as _onTimeout
at Timer.listOnTimeout as ontimeout

How can i solve this problem?

share an arduino between multiple processes

wait until board connect

not sleep, check connection.

on_analog_change & on_digital_change

implements "on_analog_change" and "on_digital_change" methods.

pin = 0
arduino.on_analog_changed pin do |value|
  puts "#{pin} => #{value}"
end

Initialization hangs without nonblock_io option

When attempting to connect, if the nonblock_io option is not passed, it does not connect, and ends up hanging instead.
The code by default sets @read_byte_size = 9600, then in the read method, it blocks trying to read 9600 bytes. During connect, when it waits for the version report, it hangs because the version report is only 8 bytes.

Because it is sitting there sending the "version report" command over and over, the responses will eventually fill the buffer and cause the loop to end, but it takes a very long time.

write test

Can't run tests with `ruby-2.2.2`

I have loaded SysexLedBlinkFirmata onto my Arduino and set ARDUINO variable on my env correctly. bundle install succeeded although I had to bump version of serialport (see #44).

arduino_firmata$ rake test
/Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1/io/open.rb:2:in `close': Bad file descriptor @ fptr_finalize - /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1/io/open.rb (Errno::EBADF)
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1/io/open.rb:2:in `open'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1/io/open.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:22:in `block in require_relative_dir'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:21:in `each'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:21:in `require_relative_dir'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1/io.rb:3:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:22:in `block in require_relative_dir'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:21:in `each'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:21:in `require_relative_dir'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.1.rb:3:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.2.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.3.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/1.9.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/2.0.0.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/2.0.rb:2:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/backports-3.3.4/lib/backports.rb:3:in `<top (required)>'
    from /Users/lukemcfarlane/Workspaces/Personal/arduino_firmata/test/test_helper.rb:4:in `require'
    from /Users/lukemcfarlane/Workspaces/Personal/arduino_firmata/test/test_helper.rb:4:in `<top (required)>'
    from /Users/lukemcfarlane/Workspaces/Personal/arduino_firmata/test/test_arduino_firmata.rb:1:in `require'
    from /Users/lukemcfarlane/Workspaces/Personal/arduino_firmata/test/test_arduino_firmata.rb:1:in `<top (required)>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:10:in `require'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:10:in `block (2 levels) in <main>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:9:in `each'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:9:in `block in <main>'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:4:in `select'
    from /Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb:4:in `<main>'
rake aborted!
Command failed with status (1): [ruby -I"lib" -I"/Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib" "/Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/gems/rake-10.1.0/lib/rake/rake_test_loader.rb" "test/test_*.rb" ]
/Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/bin/ruby_executable_hooks:15:in `eval'
/Users/lukemcfarlane/.rvm/gems/ruby-2.2.2/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => test
(See full trace by running task with --trace)

block syntax

led_stat = false

ArduinoFirmata.connect do
  10.times do
    digital_write 13, led_stat
    led_stat = !led_stat
    sleep 0.5
  end
end

implement Servo API

support Sysex command

実装するもの

PC→Arduinoにsysexコマンドを送る関数を作る
Arduino→PCに来たsysexへのコールバック関数を登録できるようにする

Sysexコマンド

PC-Firmata間で2byte以上のデータをやりとりする時に使う。StandardFirmataではArduino→PCへのDIGITAL_MESSAGE, ANALOG_MESSAGE, REPORT_VERSIONで使われている。
自作のコマンドを実行させるのにも使われる。

[START_SYSEX, コマンド名, 7bitを32個分のデータ, END_SYSEX] を1セットとして送信する。
http://firmata.org/wiki/V2.1ProtocolDetails#Sysex_Message_Format

/* Generic Sysex Message
 * 0     START_SYSEX (0xF0)
 * 1     sysex command (0x00-0x7F)
 * x     between 0 and MAX_DATA_BYTES 7-bit bytes of arbitrary data
 * last  END_SYSEX (0xF7)
 */

MAX_DATA_BYTESは /Applications/Arduino.app/Contents/Resources/Java/libraries/Firmata/Firmata.h で定義されている。
デフォルトで7bitのデータを最大32個送れる。

#define MAX_DATA_BYTES 32 // max number of data bytes in non-Sysex messages

既に定義されているsysex command。0x00-0x0Fはユーザが自分のアプリ内で定義していいらしい。

// extended command set using sysex (0-127/0x00-0x7F)
/* 0x00-0x0F reserved for user-defined commands */
#define SERVO_CONFIG            0x70 // set max angle, minPulse, maxPulse, freq
#define STRING_DATA             0x71 // a string message with 14-bits per char
#define SHIFT_DATA              0x75 // a bitstream to/from a shift register
#define I2C_REQUEST             0x76 // send an I2C read/write request
#define I2C_REPLY               0x77 // a reply to an I2C read request
#define I2C_CONFIG              0x78 // config I2C settings such as delay times and power pins
#define EXTENDED_ANALOG         0x6F // analog write (PWM, Servo, etc) to any pin
#define PIN_STATE_QUERY         0x6D // ask for a pin's current mode and value
#define PIN_STATE_RESPONSE      0x6E // reply with pin's current mode and value
#define CAPABILITY_QUERY        0x6B // ask for supported modes and resolution of all pins
#define CAPABILITY_RESPONSE     0x6C // reply with supported modes and resolution
#define ANALOG_MAPPING_QUERY    0x69 // ask for mapping of analog to pin numbers
#define ANALOG_MAPPING_RESPONSE 0x6A // reply with mapping info
#define REPORT_FIRMWARE         0x79 // report name and version of the firmware
#define SAMPLING_INTERVAL       0x7A // set the poll rate of the main loop
#define SYSEX_NON_REALTIME      0x7E // MIDI Reserved for non-realtime messages
#define SYSEX_REALTIME          0x7F // MIDI Reserved for realtime messages
// these are DEPRECATED to make the naming more consistent
#define FIRMATA_STRING          0x71 // same as STRING_DATA
#define SYSEX_I2C_REQUEST       0x76 // same as I2C_REQUEST
#define SYSEX_I2C_REPLY         0x77 // same as I2C_REPLY
#define SYSEX_SAMPLING_INTERVAL 0x7A // same as SAMPLING_INTERVAL

現在のgem内での実装

arduino_firmata gemでは、START_SYSEXとEND_SYSEXが const.rbで定義されてる
https://github.com/shokai/arduino_firmata/blob/master/lib/arduino_firmata/const.rb

module ArduinoFirmata
  START_SYSEX     = 0xF0 # start a MIDI SysEx message
  END_SYSEX       = 0xF7 # end a MIDI SysEx message
end

ArduinoFirmata::Arduino::write関数はprivateにしてある。
PC→Arduinoへsysexコマンドを送る関数を作る必要アリ。
Arduino→PCにコマンドが来た時のイベントも登録できるようにしたい。

Arduino側にSysexコマンドを登録する

/Applications/Arduino.app/Contents/Resources/Java/libraries/Firmata/Firmata.cpp にあるattach関数にsysex command (0x00-0x7F)を引数として、コールバックを登録する。

http://firmata.org/wiki/V2.1ProtocolDetails#Sysex_Message_Format を見ると、0x00~0x0Fはユーザが自由に使って良い様に予約されているんだけど、登録しても現在Arduino IDEに付属しているFirmata.cpp内では呼び出されるように実装されてない。

方法は2つで、

SysexのSTRING_DATAコマンドが来た時のイベントを登録する
Sysexを受信した時の関数を登録する

のどちらか。

1. STRING_DATA (0x71)コマンドが来た時のイベントを登録

STRING_DATAは自作アプリで使える。

STRING_DATA (0x71)はFirmata.cpp内でコールバックとして登録できるようになっているが、Arduino IDE付属のStandardFirmata.inoからは使われていない。

スケッチ例のEchoStringで使ってる。

#include <Firmata.h>

byte analogPin;

void stringCallback(char *myString)
{
    Firmata.sendString(myString);
}


void sysexCallback(byte command, byte argc, byte*argv)
{   
    Firmata.sendSysex(command, argc, argv);
}

void setup()
{   
    Firmata.setFirmwareVersion(0, 1);
    Firmata.attach(STRING_DATA, stringCallback);
    Firmata.attach(START_SYSEX, sysexCallback);
    Firmata.begin(57600);
}

void loop()
{   
    while(Firmata.available()) {
        Firmata.processInput();
    }
}

2. Sysexを受信した時のコールバック関数を登録

StandardFirmataの void sysexCallback(byte command, byte argc, byte *argv) 関数内のswitch文に書き足すといい。
I2C関係はここで定義されている。

参考になる

FlashとArduinoで赤外線リモコン http://garretlab.web.fc2.com/arduino/lab/infrared_controller_with_flash/index.html
V2.1ProtocolDetails - Firmata http://firmata.org/wiki/V2.1ProtocolDetails

reading i2c sensors

Hi,
I need some help. I want to read sensor values from a I2C sensor.
I think I need the sysex commands. I tried this:

arduino.pinMode(3, firmata.PIN_MODE_I2C);
arduino.pinMode(2, firmata.PIN_MODE_I2C);
console.log("I2C activated");
arduino.sysex('I2C_CONFIG');
arduino.sysex('I2C_REQUEST, [0x58, 'I2C_READ'], function(x){
arduino.on('sysex', function(e){
console.log("Data: ", e.command);
console.log("data : " + JSON.stringify(e.data));
});

It is not working and I have no idea how to realise the reading.
Thanks

analog_read not works on Arduino UNO

everytime returns 0

share an arduino with dRuby

最初にarduinoに接続したプロセスがdRubyサーバーになる
- 適当な開いているportを使う

evetmachine

set :eventmachine option on ArduinoFirmata#connect

arduino = ArduinoFirmata.connect, '/dev/tty.device-name', :eventmachine => true

use EM::defer instead of Thread.

SYSTEM_RESET command

これをwriteする関数を作る

SYSTEM_RESET    = 0xFF # reset from MIDI

cannot detect :digital_read with pin-8

arduino.pin_mode 8, ArduinoFirmata::INPUT

arduino.on :digital_read do |pin, status|
  puts "digital pin #{pin} changed : #{status}"  # => "pin 0 changed"
end

support Arduino UNO on Linux

add default name "/dev/ttyACM0" into ArduinoFirmata.list

add sinatra sample

control arduino via HTTP

StringIO#bytes Error on Ruby2.0.0

Ruby2.0.0でエラーがでる

lib/arduino_firmata/arduino.rb:172: warning: StringIO#bytes is deprecated; use #each_byte instead

String#each_byte を使えばいいらしい

throw Error "device not found"

disconnect arduino
open default arduino

this code should throw "device not found" error

arduino = ArduinoFirmata.connect

/Users/sho/.rvm/gems/ruby-1.9.2-p320/gems/serialport-1.1.0/lib/serialport.rb:16:in `create': wrong argument type (TypeError)
        from /Users/sho/.rvm/gems/ruby-1.9.2-p320/gems/serialport-1.1.0/lib/serialport.rb:16:in `new'
        from /Users/sho/.rvm/gems/ruby-1.9.2-p320/gems/arduino_firmata-0.2.3/lib/arduino_firmata/arduino.rb:23:in `initialize'
        from /Users/sho/.rvm/gems/ruby-1.9.2-p320/gems/arduino_firmata-0.2.3/lib/arduino_firmata/main.rb:14:in `new'
        from /Users/sho/.rvm/gems/ruby-1.9.2-p320/gems/arduino_firmata-0.2.3/lib/arduino_firmata/main.rb:14:in `connect'

add test for digital_write, analog_write, servo_write and pin_mode

pin_mode(pin, mode)
digital_write(pin, value)
analog_write(pin, value)
servo_write(pin, angle)

Performance and annoying sound

Im using your library with the nonblocking turned on and eventmachine. I faced a problem with this part of the process input interval:

      @process_input_interval = eventmachine ? 0.0001 : 0.01

Since the interval in a eventmachine setup is very high my machine (linux) produces an annoying high freq. sound. Also it uses one core at 80% cpu (without doing anything). I manually tried this:

      @process_input_interval = 0.01

And it removed the sound and made the process use 2% cpu, when nothing happens.

Im not sure why the value is set the way it is currently. So maybe you can tell.

Thx & Kind regards

Arduino.on(:digital_read) returns pin value of 0

I use an Arduino UNO version 2.3. When I do:

require 'arduino_firmata'

arduino = ArduinoFirmata.connect

puts "firmata version #{arduino.version}"

arduino.pin_mode 8, ArduinoFirmata::INPUT
puts arduino.digital_read(8)

loop do
  arduino.on(:digital_read) do |pin, status|
    #if pin == 8
      puts "digital pin #{pin} changed : #{status}"
    #end
  end
  sleep(0.1)
end

I always get a pin value of 0 (digital pin 0 changed : true). Consequently the if block doesn't execute correctly either, so I've commented it out here.

Is this a feature (and I'm just doing something wrong) or a bug?

sysex command test

これを使う

Sysex test is failing

It seems that the sysex command is not properly handled.

$ rake test TEST=/home/paolo/projects/contrib/arduino_firmata/test/test_sysex.rb
Run options: --seed 14609

# Running:

F

Finished in 11.043371s, 0.0906 runs/s, 0.0906 assertions/s.

  1) Failure:
TestSysex#test_sysex_command [/home/paolo/projects/contrib/arduino_firmata/test/test_sysex.rb:30]:
Failed assertion, no message given.

1 runs, 1 assertions, 1 failures, 0 errors, 0 skips
rake aborted!
Command failed with status (1): [ruby -I"lib" -I"/home/paolo/.rvm/gems/ruby-2.3.0@arduino/gems/rake-10.1.0/lib" "/home/paolo/.rvm/gems/ruby-2.3.0@arduino/gems/rake-10.1.0/lib/rake/rake_test_loader.rb" "/home/paolo/projects/contrib/arduino_firmata/test/test_sysex.rb" ]
/home/paolo/.rvm/gems/ruby-2.3.0@arduino/bin/ruby_executable_hooks:15:in `eval'
/home/paolo/.rvm/gems/ruby-2.3.0@arduino/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => test
(See full trace by running task with --trace)

I am running Firmata 2.5.

I had to update both serialport and backports to get things working, I don't know if it is related to this issue.

block syntax

led_stat = false

ArduinoFirmata.connect do
  10.times do
  digital_write 13, led_stat
end

use EventEmitter

EventEmitter

http://shokai.github.com/event_emitter

analog_read
sysex_receive

analog

current

arduino.on_analog_changed 0 do |value|
  puts value  # => 0 ~ 1023
end

new

arduino.on :analog_read do |pin, value|
  puts "#{pin} -> #{value}"
end

sysex

current

arduino.on_sysex_received(0x01) do |data|
  puts "command : 0x01"
  puts "data    : #{data.inspect}"
end

new

arduino.on :sysex do |command, data|
  puts "command : #{command}"
  puts "data    : #{data.inspect}"
end

check arguments (negative values)

some functions will crash ruby process when got negative values

digital_read(pin)
analog_read(pin)
pin_mode(pin, mode)
digital_write(pin, value)
analog_write(pin, value)
servo_write(pin, angle)

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Welcome to Node-RED

実装するもの

Sysexコマンド

現在のgem内での実装

Arduino側にSysexコマンドを登録する

1. STRING_DATA (0x71)コマンドが来た時のイベントを登録

2. Sysexを受信した時のコールバック関数を登録

参考になる

EventEmitter

analog

sysex

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