nt4

Description:

nt4

Dart implementation of the WPILib NT4 protocol
Usage #
// Connect to NT4 server at 10.30.15.2
NT4Client client = NT4Client(
serverBaseAddress: '10.30.15.2',
onConnect: () {
print('NT4 Client Connected');
},
onDisconnect: () {
print('NT4 Client Disconnected');
},
);

// Publish a topic and send data
NT4Topic examplePub =
client.publishNewTopic('/SmartDashboard/CoolNumber', NT4TypeStr.typeInt);
client.addSample(examplePub, 123456);

// Subscribe to a topic
NT4Subscription exampleSub = client.subscribe('/SmartDashboard/Example');

// Recieve data from subscription with a callback or stream
exampleSub.listen((data) => print('Recieved data from callback: $data'));

await for (Object? data in exampleSub.stream()) {
print('Recieved data from stream: $data');
}

// Temporarily subscribe to a topic to retrieve its data
double? oneTimeValue = await client.subscribeAndRetrieveData<double>('/SmartDashboard/ConstantValue');

if (oneTimeValue != null) {
print('Receieved one time value from server: $oneTimeValue');
} else {
print('Client receieved no value after 2.5 seconds');
}
copied to clipboard