Recording and analyzing sound

Hi @Gordon,

Thank you for the advice! I installed "nRF UART 2.0" and tried

var v;
function g(s) {
  v=s;
  Bluetooth.write(s);
}

If you write without a semicolumn once you connected to the Puck it says "unexpected EOF". With a semicolumn I succeeded to light the LED on from here https://www.espruino.com/Puck.js+BLE+UART

If you write the function(with or without) a semicolumn in "nRF UART 2.0" or "nRF Connect" with notifications enabled I receive what I wrote, for example in "nRF UART 2.0" I have:

TX:g(5);
RX:g(5);

TX:g(9)\n
RX:g(9)\n

Do you think this could be Android specific issue as appeared in the Security thread ?

Thank you.