Sending hex data from android app to nRF DK and output to serial

[kian79]

Hi all,

My application is as follows:

I have an android app which will send some data to a nRF DK. The data I want to send is in HEX characters between 0x00 to 0xFF. And when the nRF DK receives the data, it will output the received data on its TX pin.

I have download the Android source codes for nRF-UART (https://github.com/NordicPlayground/Android-nRF-UART). I am trying to modify the android source codes to send send hex characters between 0x00 to 0xFF to a NRF DK running the ble_app_uart program.

I am having a problem with the Android app now as it somehow only allow me to send characters up to a value of 0x7F. 

byte[] value;

mService.writeRXCharacteristic(value);

In the android program, the data to be sent is declared as a byte array call value. And assigning a  value above 0x7F is not allowed. If I change it to an int array, then mService.writeRXCharactieristics(value) gives an error.

 

Anyone can help? Thanks in advance.

 

[kian79]

Hi all,

I found the problem. Its actually an Android java programming issue. Nothing to do with nordic. Sorry for the irrelevant post here.

[ConnorOsborn]

How did you resolve the issue?

[awneil]

As the last post is over a year ago, rather unlikely that the OP is still listening.

But, as stated, it was an Android issue - nothing to do with Nordic - so you'd probably be best asking in an Android developer forum?