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);
}
private void btnOpenPort_Click(object sender, EventArgs e)
{
string portName = cmbPorts.SelectedItem as string;
if (portName == null)
{
return;
}
if (serialPort != null)
{
try
{
serialPort.Dispose();
}
catch (Exception ex)
{
WriteTxtLog($"{serialPort.PortName} dispose failed. {ex}");
}
}
serialPort = new SerialPort(portName);
serialPort.Handshake = Handshake.RequestToSend;
serialPort.BaudRate = 115200;
serialPort.DataBits = 8;
serialPort.StopBits = StopBits.One;
serialPort.Parity = Parity.None;
serialPort.WriteTimeout = 1000;
serialPort.DataReceived += DataReceivedHandler;
serialPort.ErrorReceived += ErrorReceivedHandler;
try
{
serialPort.Open();
}
catch (Exception ex)
{
WriteTxtLog($"Port open failed: {portName}: {ex}");
}
WriteTxtLog($"Port opened: {portName}");
SendCommand(bglib.BLECommandSystemHello());
}
