RE: nRF UART Android App [Feature Request & a Question]

Petter Myhre — Wed, 03 Dec 2014 16:52:53 GMT

Doesn't it already send and receive raw data (bits, bytes, hex)? The raw data is then encoded using ASCII and displayed on the screen.

Unfortunately, we can't develop the app for you. If you want to remove the ASCII encoding you will have to do some app development yourself, or get someone else to do it.

If you want to have a go at it, you should go to line 239 in MainActivity.java and replace:

String text = new String(txValue, "UTF-8");
String currentDateTimeString = DateFormat.getTimeInstance().format(new Date());
listAdapter.add("["+currentDateTimeString+"] RX: "+text);

with

int i = 0;                     	 
StringBuilder sb = new StringBuilder();                  	 
while(txValue[i] != '\n')
{
    sb.append(String.format("%02X ", txValue[i]));
    i++;
}                         	
String currentDateTimeString = DateFormat.getTimeInstance().format(new Date());
listAdapter.add("["+currentDateTimeString+"] RX: "+sb.toString());

This will display the data as hex, so HELLO will be 48 45 4C 4C 4F

The BLE protocol is very secure and you can assume the data is uncorrupted.