How to M2MQTT Auto Reconnect

Question

i'm trying to use this protocol and already have 2 clients (one to publish and another to subscribe) and a broker working.

My question is i want to implement a reconnect feature in the subscribe client because the wifi signal is unstable and don't want to manually restart the client every single time, how can i accomplish this?

Answer 1

You can use the ConnectionClosed event to detect when a disconnect happens.

I then start a task that will try to reconnect the client. Something like:

 private async Task TryReconnectAsync(CancellationToken cancellationToken)
    {
        var connected = _client.IsConnected;
        while (!connected && !cancellationToken.IsCancellationRequested)
        {
            try
            {
                _client.Connect(_clientId);
            }
            catch
            {
                _logger.Log(LogLevel.Warn, "No connection to...{0}",_serverIp);
            }
            connected = _client.IsConnected;
            await Task.Delay(10000, cancellationToken);
        }
    }

Not perfect, but will do the job.