How do I resolve a characteristic write failure on Android & nRF51?

RE: How do I resolve a characteristic write failure on Android & nRF51?

Ed Ang — Sun, 05 Mar 2017 20:15:32 GMT

I managed to find the problem: I forgot to add bluetooth permissions line in my android manifest: After I did this, everything appears to be working. Thanks!

RE: How do I resolve a characteristic write failure on Android & nRF51?

gorazd — Sun, 05 Mar 2017 17:19:46 GMT

did you read this: stackoverflow.com/.../android-bluetoothgatt-status-133-register-callback

RE: How do I resolve a characteristic write failure on Android & nRF51?

Ed Ang — Sun, 05 Mar 2017 16:22:52 GMT

Hey gorazd, thanks. I tried using only writeCharacteristic() and it return a success. However, on the write callback, I am now getting at Status 133 error. Any advice will be appreciated. Thanks!

RE: How do I resolve a characteristic write failure on Android & nRF51?

gorazd — Sat, 04 Mar 2017 21:33:57 GMT

Try to do the writing after the reading is accomplished, that is after the onReadCharacteristic is executed. Or just comment out the reading part to see if thats the problem. Or use a delay. Can you do the writing with nrf connect app?

RE: How do I resolve a characteristic write failure on Android & nRF51?

Ed Ang — Sat, 04 Mar 2017 20:37:32 GMT

Hi gorazd, thanks for your reply. In this case, I am only trying to write 8 bytes.

RE: How do I resolve a characteristic write failure on Android & nRF51?

gorazd — Sat, 04 Mar 2017 19:32:42 GMT

It could be the length of the data you are writing. Try writing less than 20bytes.