public async Task <bool> SystemHello(int timeoutMs = 4000)
{
// This is a ping event. Return's true if device responds,
// false if the valid response is not received before the given timeout
var cmd = _bglib.BLECommandSystemHello();
await _bglib.SendCommandAsync(cmd).ConfigureAwait(false);
bool didTimeout = false;
using (var cts = new CancellationTokenSource(timeoutMs)) {
try { await _cmdRespWaitHandle.WaitAsync(cts.Token).ConfigureAwait(false); }
catch (OperationCanceledException) { didTimeout = true; }
}
return(!didTimeout && _lastResponseArgs is HelloEventArgs);
}