PUT a delta over TCP/HTTP

[OneLiveWeb]

Could anyone provide a simple example of updating a vessels position/heading etc via an HTTP put? I tried to so a PUT with raw JSON to this endpoint : /signalk/v1/api/

{
"vessels": {
"urn:mrn:signalk:uuid:6d0b1b4c-8a91-4f47-9b69-4ff64e196449": {
"navigation": {
"position": {
"value": {
"altitude": 0.0,
"latitude": 37.81479,
"longitude": -122.44880152
},
"source": {
"label": "SomeSource",
"type": "NMEA0183",
"talker": "GP",
"sentence": "PRMC"
},
"timestamp": "2017-05-16T05:15:50.007Z"
}
}
}
}
}

but got:

"input is missing a value"

• I'm not sure if I have the correct endpoint, my goal is to be able to update the current position of the vessel.

[tkurki]

The specification is a little unclear on this and we should improve it.

To send a new value you should send a delta over WebSocket.

https://github.com/SignalK/signalk-server/wiki/FAQ:-Frequently-Asked-Questions#how-do-i-send-data-to-the-server

[OneLiveWeb]

Thanks, got it working! Simple little android app to transfer GPS -> signalK -> openCPN via a websocket. Works well as I don't have an NMEA setup on board and want to work with pure signalK as I kit out the boat. I figured we all have sensors in our pockets, might as well use the data! Was also an excuse to learn some Flutter.

Appreciate the help, looking forward to being part of the community.

[coffeelake]

I had the same problem.
If anyone is interested in how i did it. i have all the code open source here https://github.com/wave-scout/Signal-AndroidApp feel free to copy or ask questions