Payload Conversion to Cayanne LPP

Application Development
1

Hi *,

Im currently trying to send data to the cayenne Backend using the existing Cayenne integration in TTN.
Topic is that the Device is not natively sending in CayanneLPP-Format and i have no option to change it!

I’m able to decode the Payload and where trying to convert it to a cayenneLPP Payload, but the converter tells me that he is expecting an Object.

After decoding I have an array with the values like this:
{
“BattState”: 1,
“GPSAltitude”: 380,
“GPSHorizontalAccuracy”: 189.9,
“GPSLatitude”: 48777777,
“GPSLongitude”: 90000000,
}

So my idea was to put this together in on String like:

converted = “0188” + (decoded.GPSLongitude%1000) + (decoded.GPSLatitude%1000) + (decoded.Altitude);

But sure this is not an Object…
…but my question is how to from the Object that cayenne will accept it…

Thanks.
Michael

2

Then you are out of luck. The data transmitted to cayenne is the original data received from the node, not the decoded/modified payload,

1 Like
3

Hi Jac,

Thank you for your quick response…
Is there an Option sending the data via http (Rest) to the Cayenne backend?
I found some hints in the Internet That there is a http api, but I‘m nut sure of this is available Anemone…

The TTN mqtt Integration is a Server and Cayenne offenes also a Server…
…so i Wolldecke habe to run a Client to Connect the two Servers on my own.

Thanks and Best regards Michael