WASdev/sample.arduino.write

Name: sample.arduino.write

Owner: WASdev

Description: Type some text and an LED flashes the message in Morse code. Demos using the Liberty Arduino user feature to integrate Liberty to write to Arduino and control LED from a Java app.

Created: 2016-07-07 10:42:56.0

Updated: 2016-08-25 20:16:24.0

Pushed: 2016-07-08 17:28:01.0

Homepage:

Size: 17

Language: Java

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README

sample.arduino.write

Type some text and an LED flashes the message in Morse code. Uses the Liberty Arduino user feature to integrate Liberty with Arduino.

Troubleshooting

If, when you enter some text in the webpage and press Submit, you get an error like this, it's because you have the port specified in the server.xml file doesn't match the port on which your Arduino is connected to your computer:

Application Error
SRVE0777E: Exception thrown by application class 'com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.findCommPort:228'
java.lang.IllegalArgumentException: Could not find COM port from : [ttyACM1], in available ports: [ttyACM0, ttyS4, ttyS31, ttyS30, ttyS29, ttyS28, ttyS27, ttyS26, ttyS25, ttyS24, ttyS23, ttyS22, ttyS21, ttyS20, ttyS19, ttyS18, ttyS17, ttyS16, ttyS15, ttyS14, ttyS13, ttyS12, ttyS11, ttyS10, ttyS9, ttyS8, ttyS7, ttyS6, ttyS5, ttyS3, ttyS2, ttyS1, ttyS0]
at com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.findCommPort(ArduinoAsyncImpl.java:228)
at com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.open(ArduinoAsyncImpl.java:151)
at com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.doCommand2(ArduinoAsyncImpl.java:547)
at com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.doCommand(ArduinoAsyncImpl.java:535)
at com.ibm.wasdev.arduino.impl.ArduinoAsyncImpl.digitalWrite(ArduinoAsyncImpl.java:260)
at main.java.wasdev.sample.morse.MorseCodeOutputter.light(MorseCodeOutputter.java:150)
at main.java.wasdev.sample.morse.MorseCodeOutputter.dash(MorseCodeOutputter.java:38)
at main.java.wasdev.sample.morse.MorseCodeOutputter.character(MorseCodeOutputter.java:50)
at main.java.wasdev.sample.morsecode.servlet.MorseCodeServlet.doGet(MorseCodeServlet.java:50)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at [internal classes]

To fix it:

1. Open the Arduino IDE and click Tools > Serial Port to see the port number that Arduino is connected to.
2. In Eclipse, open the server.xml: In the Servers view, expand the Liberty installation and double-click Server Configuration [server.xml]
3. In the server.xml, update the ports value in the line <usr_arduino id="default" ports="ttyACM1"/> to match the port number you found in the Arduino IDE.
4. Save the server.xml. The Liberty server automatically updates (you don't need to restart the server) so just try submitting your message again.