private void RequestGraphData(object sender, EventArgs e) { if (Device != null && Device.IsReady) { Device.RequestOutputData(new RequestCommand() { Address = (int)AddressByte.PulseAmp_A }); Device.RequestOutputData(new RequestCommand() { Address = (int)AddressByte.PulseAmp_B }); } double current_unixtime = UnixTime.Current(); double cutoff = current_unixtime - 20; Proxy.PruneAmplitudeHistory(cutoff); }