Cayenne integration: Where is my payload?

AdamJP · March 15, 2017, 8:02am

Wow awesome work, thanks!

eptak · March 15, 2017, 2:43pm

Great work TTN ! Thanks for pushing Cayenne LPP !
Per the JS decoder function, we are going to open source ou Cayenne LPP decoder.
We’ll be able to provide you the code then

edzob · April 7, 2017, 9:33am

Hi All, great discussion and great reads on Cayenne LPP.
Thank you so much…

I tried to combine the TTN Build your own Sensor Workshop, with an implementation of Cayenne LPP.
I think the payload looks ok, but Cayenne does not accept it, since on the dashboard I only see the RSSI and SNR.

Question:
Is there an cayenne LPP Decoder online available that I can feed my byte string and then see what I did wrong?

// Cayenne LPP Byte definition
// https://github.com/myDevicesIoT/cayenne-docs/blob/master/docs/LORA.md

// Cayenne LPP Payload buildup
// https://hansboksem.wordpress.com/2017/03/06/sending-sensor-data-through-the-things-network-to-cayenne/

// Lora TTN via LMIC and bmp280 code
// https://github.com/galagaking/ttn_nodeworkshop/blob/master/ttn_bmp280_abp.ino

// Edzo’s First LoRa TTN Cayenne LPP Implementation
// https://github.com/edzob/loraNode/blob/master/sketch_20170406_lora.ino

old
// Byte string in the Lora TTN Payload
// 036700E9046800057328163C94100F141E3D6F08

arjanvanb · April 7, 2017, 4:23pm

It’s not too hard to manually decode this? I run into problems using the documentation:

03 67 00E9            67 = temperature
04 68 00              68 = humidity
05 73 2816            73 = barometer
3C 94 100F141E3D6F08  94 = unknown type?

(My guess is that you’re missing xx 88 at the start of the last section, for GPS location. Any online decoder would fail as well, so is of little help…)

edzob · April 7, 2017, 10:26pm

@arjanvanb Thanks for the hint.

I first build a hardcoded message with the existing code
and then used the example functions to build up payload with the sensor data
and now it works!

I needed some reading on Hex Decimals and and Byte Array… and learned a lot.
Thanks for the nudge into the right direction

Code on github is updated.

IoT_Marco · April 10, 2017, 10:21pm

Hi,

I have a TTN/Cayenne device integration. This device has a DHT11 sensor and the payload is in LPP format.
The application data in the TTN Console looks fine to me: 036700C804684400
channel 03, type 67, tempvalue: 20C and channel 04, type 68, humvalue: 34%

My problem; I only see the RSI and SNR widget in Cayenne and reading the answers in previous posts there must be something wrong with my payload but I have no idea. Anyone else?

arjanvanb · April 11, 2017, 5:21am

That should be one byte, not two, for the value. But you’re sending 04 68 4400.

IoT_Marco · April 11, 2017, 8:55am

Thanks Arjan, that is exactly what played in my mind.
At the moment I’ve no access to the code but I’ll try to remove the last byte.

IoT_Marco · April 13, 2017, 12:02pm

int16_t val;
uint8_t channel;
byte buffer[8];
uint8_t cursor = 0;

val = temperature;
val = temperature * 10;
channel = 0x03;
buffer[cursor++] = 0x03;
buffer[cursor++] = LPP_TEMPERATURE;
buffer[cursor++] = val >> 8;
buffer[cursor++] = val;

val = humidity;
channel = 0x04;
buffer[cursor++] = channel;
buffer[cursor++] = LPP_RELATIVE_HUMIDITY;
buffer[cursor++] = humidity * 2;

// Check if there is not a current TX/RX job running
if (LMIC.opmode & OP_TXRXPEND) {
Serial.println(F(“OP_TXRXPEND, not sending”));
} else {
// Prepare upstream data transmission at the next possible time.
//LMIC_setTxData2(1, buffer, sizeof(buffer)/sizeof(buffer[0]), 0);
LMIC_setTxData2(1, buffer, 7, 0); //brute force

arjanvanb · April 13, 2017, 4:19pm

…or:

byte buffer[7];
...
LMIC_setTxData2(1, buffer, sizeof(buffer)/sizeof(buffer[0]), 0);

…or better yet:

byte buffer[20]; // any maximum size your payload might need
...
buffer[cursor++] = ...
buffer[cursor++] = ...
LMIC_setTxData2(1, buffer, cursor, 0);

ivo_noorhoff · May 11, 2017, 9:04am

I’d really like to know this as well. Cayenne seems like a great tool and i want to use it but use more efficient payloads. The channel is inferred from the node ID, node sensor has a fixed structure so there is no need to repeat the meta data for the sensor data every time etc.

Rustie0125 · May 13, 2017, 6:26am

Hi Johan

Im trying to use your example code on a 32u4 Lora feather with thing works. few questions if you dont mind.

TTN OTAA

Are you not missing the DEV EUI input?
is the input(s) straight copy and past from TTN like so or does it need to be reveresed the same as the LMIC stuff?
const char *appEui = “70B3D57EF0004C11”;
const char *appKey = “0000110220330440550660770880990A”;

I have installed your library, copied your example changed the two keys and uploaded the code but i see not registration attemps in TTN or any data flowing.

Thank you
Johann

johan · May 15, 2017, 8:18am

The example in TheThingsNetwork Arduino library are specifically for Arduinos with the Microchip RN2xx3 module. With the 32u4 LoRa feather I’d suggest using LMiC. And then, indeed, you need to reverse the byte order.

douwey · January 29, 2018, 6:46pm

Hi,
I’m also having trouble getting my data to Cayenne. Can you guys help me with what I’m doing wrong? (I know it’s not the prettiest code)

    void do_send(osjob_t* j) {
  // Check if there is not a current TX/RX job running
  if (LMIC.opmode & OP_TXRXPEND) {
    // Serial.println(F("OP_TXRXPEND, not sending"));
  } else {
    // Read distance
    int distance = readDistance();
    mydata[0] = (uint8_t)distance;

  //  LMIC_setTxData2(1, mydata, sizeof(mydata), 0);

    // Cayenne LPP Protocal Definition
#define LPP_DIGITAL_OUTPUT         1     
    // Init declaration
    uint8_t val;
    uint8_t channel;
    byte buffer[8];
    uint8_t cursor = 0;

    // set Sensor Barometric Pressure into payload
    val = mydata;
    channel = 0x04;
    {
    
    buffer[cursor++] = channel; 
    buffer[cursor++] = LPP_DIGITAL_OUTPUT; 
    buffer[cursor++] = val; 

    return cursor;
}
   
    // Check if there is not a current TX/RX job running
    if (LMIC.opmode & OP_TXRXPEND) {
      Serial.println(F("OP_TXRXPEND, not sending"));
    } else {
      // Prepare upstream data transmission at the next possible time.
      LMIC_setTxData2(1, buffer, sizeof(buffer) / sizeof(buffer[0]), 0);

      //Serial output of message
      Serial.println(F("Sending: "));
      for (byte b = 0; b < (sizeof(buffer) / sizeof(buffer[0])); b++) {
        Serial.print(buffer[b]);

      }
      // Serial.println(F("Packet queued"));
    }
    // Next TX is scheduled after TX_COMPLETE event.

  }
}

BoRRoZ · January 29, 2018, 9:39pm

you have an Cayenne account and set integrations in the Console to Cayenne ? (just to be sure)

mrme · January 29, 2018, 9:50pm

Code is not very easy to read. Maybe use the lpp library in the sketch? TTN LPP GitHub . Check if message is received on gateway and application. If so try a manual upload of the data from console and see if it is received by mydevices.

arjanvanb · January 29, 2018, 10:04pm

…but it seems to me you’re not filling the whole buffer with data.

So, maybe something like:

LMIC_setTxData2(1, buffer, cursor, 0);
for (byte b = 0; b < cursor; b++) {
    Serial.print(buffer[b]);
}

Also, if I understand your code formatting correctly then it seems the return cursor; exits the function prematurely (and Serial.println(F("Sending: ")); is never even invoked), but I’ll leave proper formatting to you, before asking again…

Admitting that is never an excuse!

gizmocuz1 · April 29, 2018, 8:16am

I made a CayenneLPP to JSON decoder (C++), but it could of course also be used as a start template for your own code.
Maybe it could be of use for some reading this topic

CayenneLPP-Decoder

Alluvium · September 26, 2018, 12:38pm

Hii

I’m also having trouble getting my data to Cayenne. I’m tried to sending GPS data to Cayenne Dashboard but only RSSI and SNR data shown but not GPS location, here it is code i tried. Can you guys help me what’s wrong in this?

function Decoder(b,port)
{
    var decode     = {};
    var decode204  = {};
    var decode205  = {};
    var decode207  = {};

    if(port == 204)
    {
        decode204.payload    = b;
        decode204.porta      = port;
        decode.lat           = b[0]<<16 | b[1]<<8 | b[2];
        decode.lng           = b[3]<<16 | b[4]<<8 | b[5];
        decode204.altitude   = b[6]<<8  | b[7];
        decode204.hdop       = b[8];
        decode204.temperature=(b[9]&0x0F)*100;
        decode204.temperature+=(b[10]>>4)*10;
        decode204.temperature+=(b[10]&0x0F);
        if (b[9]&0xF0) 
            decode204.temperature/=-10;
        else
            decode204.temperature/=10;

        decode204.battery =(b[11]>>4)*10;
        decode204.battery+=(b[11]&0x0F);

        decode204.latitude      = (decode.lat / 8388606) * 90;
        decode204.longitude     = (decode.lng / 8388606) * 180;

        return {
            payload:     decode204.payload,
            port:        decode204.porta,
            longitude:   decode204.longitude,
            latitude:    decode204.latitude,
            altitude:    decode204.altitude,
            temperature: decode204.temperature,
            hdop:        decode204.hdop,
        }
    }
    else if(port===205)
    {
        decode205.payload     = b;
        decode205.porta       = port;
        decode205.temperature =(b[0]&0x0F)*100;
        decode205.temperature+=(b[1]>>4)*10;
        decode205.temperature+=(b[1]&0x0F);
        if (b[0]&0xF0) 
  	        decode205.temperature/=-10;
        else
            decode205.temperature/=10;

        decode205.battery=(b[2]>>4)*10;
        decode205.battery+=(b[2]&0x0F);
  
        return {
            payload:     decode205.payload,
            port:        decode205.porta,
            longitude:   "",
            latitude:    "",
            altitude:    "",
            temperature: decode205.temperature,
            hdop:        "",
        }
    }
    else if(port===207)
    {
        decode207.payload     = b;
        decode207.porta       = port;
        decode207.temperature =(b[0]&0x0F)*100;
        decode207.temperature+=(b[1]>>4)*10;
        decode207.temperature+=(b[1]&0x0F);
        if (b[0]&0xF0) 
  	        decode207.temperature/=-10;
        else
            decode207.temperature/=10;

        decode207.battery=(b[2]>>4)*10;
        decode207.battery+=(b[2]&0x0F);
        
        return {
            payload:     decode207.payload,
            port:        decode207.porta,
            longitude:   "",
            latitude:    "",
            altitude:    "",
            temperature: decode207.temperature,
            hdop:        "",
        }
    }
    else 
    {
        decode.porta   = port;
        decode.payload = b;
        
        return {
            payload:     decode.payload,
            port:        decode.porta,
            longitude:   "",
            latitude:    "",
            altitude:    "",
            temperature: "",
            hdop:        "",
        }
    }
}

ricaun · September 26, 2018, 1:31pm

Are you using a Custom Payload Format??!
I guess you need to change to Cayenne LPP on Payload Formats.
And your Node need to payload data with the CayenneLPP library —> https://www.thethingsnetwork.org/docs/devices/arduino/api/cayennelpp.html

#include <CayenneLPP.h>
CayenneLPP lpp(51);

void PayloadNow(Stream &out)
{
  lpp.reset();
  lpp.addTemperature(1, get_temperature());

  if (gps_read()){
    lpp.addGPS(1, gps_latitude(), gps_longitude() , gps_meters());
  }
  lpp.addAnalogInput(4, readVcc() / 1000.0);
  out.write(lpp.getBuffer(), lpp.getSize());
}

Something like this!