Difference between revisions of "ChronoCloud 2"

Revision as of 21:00, 18 December 2017

ChronoCloud 2 protocol enables other applications to aquire real time timing data from ChronoFly.

Application is required to establish a WebSocket server where ChronoFly can send real time timing data.

WebSocket server example

NodeJs

var ws = require("nodejs-websocket");

var server = ws.createServer(function(conn) {
    var station;
    conn.on("text", function(msg) {
        var dataObject = JSON.parse(msg);
        station = dataObject.station;
        conn.sendText("bumb-" + dataObject.data.id);
        console.log(Date() + " got time " + dataObject.data.time);
    });
    conn.on("close", function(code, reason) {
        console.log(Date() + " " + station + " not publishing anymore");
    });
}).listen(8275);

Protocol

Uses WebSocket Draft_6455 and TCP port 8275.

Passing PDU

Sent whenever passing (transponder or manual) is registered on ChronoFly.

{
    "station": "ChronoFly-12345",
    "competition": "166656",
    "signature": "c39cfef55ac1b471",
    "data": {
        "event": "passing",
        "id": "70",
        "type": "Route-TC-Finish",
        "round": "ET 4 TC 9 Huhdanoja A",
        "time": "2007-11-20T22:19:17.532+02:00",
        "transponder": "7",
        "hits": "0",
        "lap": "5"
    }
}

Where

• station: ChronoFly station identifier
• competition: ChronoFly competition identifier
• signature: Data signature based on keys negotiated during ChronoFly registration

• event: event type
• id: event id (incremented by 1 and zeroed when round changed or tables cleared)
• type: station type selected currently at ChronoFly
• round: round name selected currently at ChronoFly
• time: passing time
• transponder: passing transponder number
• hits: times same transponder has been seen during current passing event
• lap: times same transponder has been seen during selected round (incremented by 1)

Confirmation rules

Whenever server receives a PDU it is required to confirm it back to the sender (ChronoFly).

Response format is: bumb-<data.id>

Example confirmation response

bumb-4291

If PDU is not confirmed back to sender (ChronoFly) it will be re-sent to server during next event cycle.

Supported station types

• Route-Finish
• Route-Start
• Route-Pause
• TC-Time
• TC-Separate
• TC-Pause
• Route-TC-Finish
• Route-TC-Start
• Track-Finish
• Track-Sector

Connection PDU

Sent whenever ChronoFly connects to the WebSocket server.

{
    "station": "ChronoFly-12345",
    "competition": "166656",
    "signature": "642a417f03b2ea3b",
    "data": {
        "event": "connected",
        "id": "0",
        "version": "1.2.30"
    }
}

Where

• station: ChronoFly station identifier
• competition: ChronoFly competition identifier
• signature: Data signature based on keys negotiated during ChronoFly registration

• event: event type
• id: event id (incremented by 1 and zeroed when round changed or tables cleared)
• version: ChronoFly version

Keepalive PDU

Sent every 30 seconds to the WebSocket server.

{
    "station": "ChronoFly-12345",
    "competition": "166656",
    "signature": "642a417f03b2ea3b",
    "data": {
        "event": "keepalive",
        "id": "0"
    }
}

Where

• station: ChronoFly station identifier
• competition: ChronoFly competition identifier
• signature: Data signature based on keys negotiated during ChronoFly registration

• event: event type
• id: event id (incremented by 1 and zeroed when websocket tcp stream opened)

Confirmation rules

Whenever server receives a PDU it is required to confirm it back to the sender (ChronoFly).

Response format is: pong

Example confirmation response

pong

If PDU is not confirmed back to sender (ChronoFly) it will be re-sent to server during next event cycle.

Malfunction PDU

Sent every 30 seconds to the WebSocket server.

{
    "station": "ChronoFly-12345",
    "competition": "166656",
    "signature": "642a417f03b2ea3b",
    "data": {
        "event": "malfunction",
        "message": "java.net.SocketException: Connection timeout at com.enymind.drivers.MercuryComm.connect()",
        "message2": "Unknown error",
        "type": "1"
    }
}

Where

• station: ChronoFly station identifier
• competition: ChronoFly competition identifier
• signature: Data signature based on keys negotiated during ChronoFly registration

• event: event type
• message: malfunction desctiption
• message2: additional malfunction desctiption
• type: malfunction type