Sensor hub 2560 - payload structure

WisBlock
#1

Hello ,

I am currently facing an issue with decoding a payload from my sensor hub, and I’m seeking assistance in understanding its structure and extracting the values from the payload bytes. Here are the details of my setup:
I have a sensor hub with a sensor probe, and the sensor probe has three I/O connections. The payload I am working with is: 007E001703016700E20270008003C00043.
I would greatly appreciate it if someone could help me understand the structure of this payload and guide me on how to determine the location of the values within the bytes. Any suggestions or assistance would be incredibly valuable.
Thank you

#2

Are you looking for a payload decoder for TTN, Chirpstack or an integration like Datacake?

You can have a look into the SensorHub Decoder which works on TTN and Chirpstack V3.

Or the Standardized Payload Decoder. That works as well on Chirpstack V4.

1 Like
#3

Yes , but also I need to understand the structure of the coming payload from the sensor hub in which specific byte the value of the sensor probes are hidden

image
image1576×641 200 KB

bytes from the payload : “bytes”: [
0,
126,
0,
23,
3,
1,
103,
0,
229,
2,
112,
0,
124,
3,
192,
0,
58
]
},

#4

It is CayenneLPP format, it is put together as
<sensor_id>,<sensor_type>,<sensor_value>

Sensor ID is just a number.
Sensor Type is defined in the payload decoder I pointed you to
Sensor value length is defined in the payload decoder I pointed you to

image
image1018×696 49.7 KB

1 Like
#5 
  "decoded_payload": {
    "0": {
      "divisor": 1,
      "name": "digital_in",
      "signed": false,
      "size": 1
    },
    "1": {
      "divisor": 1,
      "name": "digital_out",
      "signed": false,
      "size": 1
    },
    "2": {
      "divisor": 100,
      "name": "analog_in",
      "signed": true,
      "size": 2
    },
    "3": {
      "divisor": 100,
      "name": "analog_out",
      "signed": true,
      "size": 2
    },
    "100": {
      "divisor": 1,
      "name": "generic",
      "signed": false,
      "size": 4
    },
    "101": {
      "divisor": 1,
      "name": "illuminance",
      "signed": false,
      "size": 2
    },
    "102": {
      "divisor": 1,
      "name": "presence",
      "signed": false,
      "size": 1
    },
    "103": {
      "divisor": 10,
      "name": "temperature",
      "signed": true,
      "size": 2
    },
    "104": {
      "divisor": 20,
      "name": "humidity",
      "signed": false,
      "size": 2
    },
    "112": {
      "divisor": 10,
      "name": "humidity_prec",
      "signed": true,
      "size": 2
    },
    "113": {
      "divisor": 1000,
      "name": "accelerometer",
      "signed": true,
      "size": 6
    },
    "115": {
      "divisor": 10,
      "name": "barometer",
      "signed": false,
      "size": 2
    },
    "116": {
      "divisor": 100,
      "name": "voltage",
      "signed": false,
      "size": 2
    },
    "117": {
      "divisor": 1000,
      "name": "current",
      "signed": false,
      "size": 2
    },
    "118": {
      "divisor": 1,
      "name": "frequency",
      "signed": false,
      "size": 4
    },
    "120": {
      "divisor": 1,
      "name": "percentage",
      "signed": false,
      "size": 1
    },
    "121": {
      "divisor": 1,
      "name": "altitude",
      "signed": true,
      "size": 2
    },
    "125": {
      "divisor": 1,
      "name": "concentration",
      "signed": false,
      "size": 2
    },
    "128": {
      "divisor": 1,
      "name": "power",
      "signed": false,
      "size": 2
    },
    "130": {
      "divisor": 1000,
      "name": "distance",
      "signed": false,
      "size": 4
    },
    "131": {
      "divisor": 1000,
      "name": "energy",
      "signed": false,
      "size": 4
    },
    "132": {
      "divisor": 1,
      "name": "direction",
      "signed": false,
      "size": 2
    },
    "133": {
      "divisor": 1,
      "name": "time",
      "signed": false,
      "size": 4
    },
    "134": {
      "divisor": 100,
      "name": "gyrometer",
      "signed": true,
      "size": 6
    },
    "135": {
      "divisor": 1,
      "name": "colour",
      "signed": false,
      "size": 3
    },
    "136": {
      "divisor": [
        10000,
        10000,
        100
      ],
      "name": "gps",
      "signed": true,
      "size": 9
    },
    "137": {
      "divisor": [
        1000000,
        1000000,
        100
      ],
      "name": "gps",
      "signed": true,
      "size": 11
    },
    "138": {
      "divisor": 1,
      "name": "voc",
      "signed": false,
      "size": 2
    },
    "142": {
      "divisor": 1,
      "name": "switch",
      "signed": false,
      "size": 1
    },
    "188": {
      "divisor": 10,
      "name": "soil_moist",
      "signed": false,
      "size": 2
    },
    "190": {
      "divisor": 100,
      "name": "wind_speed",
      "signed": false,
      "size": 2
    },
    "191": {
      "divisor": 1,
      "name": "wind_direction",
      "signed": false,
      "size": 2
    },
    "192": {
      "divisor": 1000,
      "name": "soil_ec",
      "signed": false,
      "size": 2
    },
    "193": {
      "divisor": 100,
      "name": "soil_ph_h",
      "signed": false,
      "size": 2
    },
    "194": {
      "divisor": 10,
      "name": "soil_ph_l",
      "signed": false,
      "size": 2
    },
    "195": {
      "divisor": 1,
      "name": "pyranometer",
      "signed": false,
      "size": 2
    },
    "203": {
      "divisor": 1,
      "name": "light",
      "signed": false,
      "size": 1
    }
  },

do I need to sign the value type for specific sensor type with channel id !