Bash inline version of piping file to bluetoothctl

Question

bt.sh

#!/bin/bash

echo -e 'scan on\n'
sleep 2
echo -e 'devices\n'
echo -e 'quit\n'

If I pipe the above file to bluetoothctl, it works as expected.

# ./bt.sh  | bluetoothctl

But how can I do that as an inline script, I have tried the following but it does not work and bluetoothctl does not appear to register the commands:

echo -e 'scan on' | bluetoothctl && sleep 2 && echo -e 'devices\n' | bluetoothctl && echo -e 'quit\n' | bluetoothctl;

Answer 1

Use a command list:

{   printf 'scan on\n\n'
    sleep 2
    printf 'devices\n\n'
    printf 'quit\n\n'
} | bluetoothctl