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I'm sending strings over Bluetooth to an Android device.

I have an Arduino board with a Synapse SNAP RF100 module and a RN42 Bluetooth module connected to serial ports.

The data is read from the RF100 module and written to the RN42 on Arduino using 

Serial3.write(Serial2.read());

The code running on the SNAP is written in SNAPpy (a subset of Python) and is as follows:

photval = readADC(2)
myString = "Photocell Value: " + str(photoval)
print myString

The printed string is written to the RN42 which the Android device recieves and displays in a TextView.

The above code makes the Android device display Photocell:

As you can see photoval is missing.

The string is as expected on the Python side - so either the Bluetooth is altering it or the Android is.

Does anyone know what causes this?

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1 Answer 1

Reset to default
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The problem was the Arduino code - I fixed it by reading incoming data with an iteration:

void loop() {
    char rxdata[14];
    if (Serial2.available() > 0){
          Serial2.readBytes(rxdata, 14);
          Serial3.write(rxdata);
   }
}

I can now see the full string I expected.

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