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POInterfacing DF Robot Bluetooth module with Arduino
 

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  1. POInterfacing DF Robot Bluetooth module with Arduino
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    <p>How can the DF Robot Bluetooth module be connected to the Arduino so that the Arduino can communicate with it.</p> <p>I used <a href="http://yerobot.com/download/mannual/DF-Bluetooth%20Manual.pdf" rel="nofollow noreferrer">this tutorial</a>.</p> <p>I managed to get the light flashing on the module and it seems to be able to pair fine, but when I run the serial monitor and send a letter (say 'H') which should turn a light on I get a Java error:</p> <pre><code>java.io.IOException: Bad file descriptor in nativeDrain at gnu.io.RXTXPort.nativeDrain(Native Method) at gnu.io.RXTXPort$SerialOutputStream.flush(RXTXPort.java:1201) at processing.app.Serial.write(Serial.java:470) at processing.app.Serial.write(Serial.java:492) at processing.app.SerialMonitor.send(SerialMonitor.java:128) at processing.app.SerialMonitor.access$100(SerialMonitor.java:29) at processing.app.SerialMonitor$4.actionPerformed(SerialMonitor.java:82) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) </code></pre> <p>I checked the wiring and I have the RXD going to the RX (pin 0) on the board and TXD to TX (pin 1) and the rest wired up, but again still no luck. What could be the matter?</p> <p>This is the code I have on the Arduino:</p> <pre><code>int ledpin = 13; char val; void setup() { pinMode(ledpin, OUTPUT); // pin 48 (on-board LED) as OUTPUT Serial.begin(9600); // start serial communication at 9600bps } void loop() { if( Serial.available() ) { // if data is available to read val = Serial.read(); // read it and store it in 'val' } if( val == 'H' ) { // if 'H' was received digitalWrite(ledpin, HIGH); // turn ON the LED } else { digitalWrite(ledpin, LOW); // otherwise turn it OFF } delay(100); // wait 100ms for next reading } </code></pre>
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    1. USMatthew Deloughry
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      1. POInterfacing DF Robot Bluetooth module with Arduino
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      1. VTUpMod
    1. COAre you able to connect the Arduino directly to the serial port and get the communication to work (i.e. without having the Bluetooth module in the mix)?
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      1. POInterfacing DF Robot Bluetooth module with Arduino
      1. USMatthew Murdoch
    2. COyeah its just seems the bluetooth doesn't like the the arudio IDE connection libary
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      1. POInterfacing DF Robot Bluetooth module with Arduino
      1. USMatthew Deloughry
    3. COPlease could you detail the components (Arduino IDE, serial port, Bluetooth module, Arduino, etc.) and the communication mechanisms between them (serial, bluetooth, etc.)? In particular I'm not clear how sending data to the serial port gets converted to a bluetooth signal and picked up by the module.
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      1. POInterfacing DF Robot Bluetooth module with Arduino
      1. USMatthew Murdoch
 

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