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POAndroid and Arduino both receiving strange values via Bluetooth
 

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  1. POAndroid and Arduino both receiving strange values via Bluetooth
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    <p>I am using BluetoothChat code on the Android side to send an ON/OFF signal (I am sending 110, 119 or other cases as defined below) to the Arduino UNO using the chat box, but when I display the received value, it shows strange values in the Arduino Serial monitor, that is, 255, 254, 250 or 245 and replies with strange values on the Android side too.</p> <p>but suprisingly only single condition among 110, 119, etc gets true when i send these commands from android and no other instruction/LED gets properly executed/turned ON/off.</p> <p>Can any one help me figure out the problem? Below is my arduino code.</p> <pre><code>int data; String message; void setup () { Serial.begin (57600); pinMode (6, OUTPUT); pinMode (7, OUTPUT); pinMode (8, OUTPUT); pinMode (9, OUTPUT); pinMode (10, OUTPUT); digitalWrite(6, LOW); // off LED 1 at pin6 digitalWrite(7, LOW); // off LED 2 at pin7 digitalWrite(8, LOW); // off LED 3 at pin8 digitalWrite(9, LOW); // off LED 4 at pin9 digitalWrite(10, LOW); // off LED 5 at pin10 } void loop () { int i=0; if (Serial.available()&gt;0) { int data= Serial.read(); Serial.println (" Received data: "); Serial.println (data); if (data==110) //q { digitalWrite(6, HIGH); // turn on LED 1 at pin6 message = "LED 1 On"; Serial.println (message); } if (data==102) // a { digitalWrite(6, LOW); // off LED 1 at pin6 message = "LED 1 Off"; Serial.println (message); } if (data==96) //c { digitalWrite(7, HIGH); //on LED 2 message = "LED 2 On"; Serial.println (message); } if (data==115) //d { digitalWrite(7, LOW); // off LED 2 message = "LED 2 Off"; Serial.println (message); } if (data==111) //e { digitalWrite(8, HIGH); //on LED 3 message = "LED 3 On"; Serial.println (message); } if (data==97)// f { digitalWrite(8, LOW); //sets the LED 3 message = "LED 3 Off"; Serial.println (message); } if (data==107) //g { digitalWrite(9, HIGH); //turn on LED 4 message = "LED 4 On"; Serial.println (message); } if (data==120)//h { digitalWrite(9, LOW); //sets the LED 4 message = "LED 4 Off"; Serial.println (message); } if (data==99) //i { digitalWrite(10, HIGH); //sets the LED 5 message = "L5 high"; Serial.println (message); } if (data==104) //j { digitalWrite(10, LOW); //sets the LED 5 message = "LED 5 Off"; Serial.println (message); } if (data==112) //y { digitalWrite(6, HIGH); // turn on ALL LEDs digitalWrite(7, HIGH); digitalWrite(8, HIGH); digitalWrite(9, HIGH); digitalWrite(10, HIGH); message = "ALL LEDs ON"; Serial.println (message); } if (data==122)//z { digitalWrite(6, LOW); //Turn off all LEDs digitalWrite(7, LOW); digitalWrite(8, LOW); digitalWrite(9, LOW); digitalWrite(10, LOW); Serial.println ("ALL LEDs OFF"); } else { digitalWrite(13, HIGH); //sets the LED 5 delay(3000); //3sec digitalWrite(13, LOW); delay(3000); Serial.println (" else case executed "); } ////end of else } data=0; } </code></pre>
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    1. COI'm a total newbie on Arduino but if Serial.read() is reading from a bluetooth device then your Serial.println() calls are writing to that same bluetooth device, not to the Arduino serial monitor.
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    2. CONo i receive some some randomn values on serial monitor too like 255, 240. the values i receive my mobile are some what like ??/??? ??? ??
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