Wisblock TTN payload decoder

JeroenKl · December 25, 2020, 11:49am

Dear RAK experts:
Can we use the general TTN payload decoder:

RAKWireless/RUI_LoRa_node_payload_decoder/blob/master/RUISensorDataDecoder_for_TTN.js

// ttn application function to decode uplink data.
// Decode decodes an array of bytes into an object.
//  - port contains the LoRaWAN fPort number
//  - bytes is an array of bytes, e.g. [225, 230, 255, 0]
// The function must return an object, e.g. {"temperature": 22.5}
function Decoder(bytes, port) {
  var decoded = {};
  var hexString=bin2HexStr(bytes);
  return rakSensorDataDecode(hexString);
}

// convert array of bytes to hex string.
// e.g: 0188053797109D5900DC140802017A0768580673256D0267011D040214AF0371FFFFFFDDFC2E
function bin2HexStr(bytesArr) {
  var str = "";
  for(var i=0; i<bytesArr.length; i++) {
    var tmp = (bytesArr[i] & 0xff).toString(16);
    if(tmp.length == 1) {
      tmp = "0" + tmp;
    }

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As it should work for NON RUI devices like the RAK7200:

I already created a simple TTN payload decoder for the Wisblock tracker but want to complete it for more sensors.

carlrowan · December 25, 2020, 3:35pm

Hi @JeroenKl,

Payload decoder on the network server should match how the payload was packaged on your node. I dont thing there’s a general payload decoder for wisblock because you have the control on how you want the data to be arranged and packaged.

If you want to use RAK7200 decoder, then you need to follow the payload of RAK7200 for your wisblock tracker. Though I think it will be easier if you just create a different decoder for your wisblock tracker project.

JeroenKl · December 25, 2020, 4:33pm

Hi @carlrowan,

Yes that’s true, that’s why the Wisblok system is so flexible. Can create and define your own setup and config.
Your answer is clear, I’ll proceed to tweak my playload decoder for my wisblock tracker (GPS, Batt, Acc)
Thanks for your prompt reply.

BR,
Jeroen

crmrosa · February 18, 2021, 5:37pm

Hi,

I am working with WisBlock solution and “The Things Stack” then I am looking for the same decoder for this case.

Do you have any news about it?

If you don´t have it then I will begin to create one and I can share it when it is finished and tested. But I only have to sensor RAK1906 and RAK1903. well, at least it will be a starting point.

Regards,

Cláudio

beegee · February 19, 2021, 3:40am

There is no decoder available yet.

crmrosa · February 20, 2021, 3:49am

Ok, then I will work on it

When it is ready, I will share with you

Regards,

Cláudio