/// <summary>
/// Send an AT command to a node and wait for a response.
/// </summary>
/// <typeparam name="TResponseData">The expected response data type</typeparam>
/// <param name="command">The command to send</param>
/// <param name="address">The address of the node. If this is null the command will be sent to the local node.</param>
/// <returns>The response data</returns>
public async Task <TResponseData> ExecuteAtQueryAsync <TResponseData>(AtCommand command,
NodeAddress address = null)
where TResponseData : AtCommandResponseFrameData
{
AtCommandResponseFrameContent responseContent;
if (address == null)
{
var atCommandFrame = new AtCommandFrameContent(command);
AtCommandResponseFrame response = await ExecuteQueryAsync <AtCommandResponseFrame>(atCommandFrame, DefaultLocalQueryTimeout);
responseContent = response.Content;
}
else
{
address.ShortAddress = address.LongAddress.IsBroadcast ? ShortAddress.Broadcast : ShortAddress.Disabled;
var remoteCommand = new RemoteAtCommandFrameContent(address, command);
RemoteAtCommandResponseFrame response =
await ExecuteQueryAsync <RemoteAtCommandResponseFrame>(remoteCommand, DefaultRemoteQueryTimeout);
responseContent = response.Content;
}
if (responseContent.Status != AtCommandStatus.Success)
{
throw new AtCommandException(responseContent.Status);
}
return(responseContent.Data as TResponseData);
}
private async Task OnNodeDiscovered(AtCommandResponseFrame frame, CancellationToken cancellationToken)
{
var discoveryData = (NetworkDiscoveryResponseData)frame.Content.Data;
if (NodeDiscovered == null || discoveryData?.LongAddress == null || discoveryData.IsCoordinator)
{
return;
}
var address = new NodeAddress(discoveryData.LongAddress, discoveryData.ShortAddress);
// XBees have trouble recovering from discovery
await Task.Delay(1000, cancellationToken);
try
{
var node = await GetNodeAsync(address);
var signalStrength = discoveryData.ReceivedSignalStrengthIndicator?.SignalStrength;
NodeDiscovered?.Invoke(this,
new NodeDiscoveredEventArgs(discoveryData.Name, signalStrength,
node));
}
catch (TimeoutException)
{
/* if we timeout getting the remote node info, no need to bubble up.
* We just won't include the node in discovery */
}
}
public void AtCommandResponseFrameTest()
{
var atResponseCommandFrame = new AtCommandResponseFrame
{
FrameId = 0x01,
Content = new AtCommandResponseFrameContent {
AtCommand = "BD"
}
};
var expectedValue = new byte[] { 0x7e, 0x00, 0x05, 0x88, 0x01, 0x42, 0x44, 0x00, 0xf0 };
Check(atResponseCommandFrame, expectedValue);
}
