Data Format Document

Click here for the decoding code: JavaScript decoding example code

The following is a detailed description of the data format.

1. LoRaWAN Node Data Upload Format

1.1 Overall Data Packet Format

Sensor-1 ID	Total Length(bytes)	Sensor Data Packet 1-1	Sensor Data Packet 1-2	...	Sensor Data Packet 1-n	...	Sensor-2 ID	Total Length(bytes)	Sensor Data Packet 1-1	...
2 bytes	1 byte						2 bytes	1 byte

note

Each LoRaWAN packet can contain data from multiple sensors.
Each sensor can contain multiple types of sub-data.

1.2 Sensor Data Packet Format

Sensor Data Packet	ID Data Type Inside the Packet	Total Valid Data Length (bytes)	Valid Data of This Sensor Packet
4 bits	4 bits	1 byte	...

note

Total Valid Data Length (bytes): This field is only present for arrays, omitted for other data types.

Data Type	Value	Bytes Occupied
array	0b0000	max 64
double	0b0001	8
float	0b0010	4
bool	0b0011	1
int8_t	0b0100	1
uint8_t	0b0101	1
int16_t	0b0110	2
uint16_t	0b0111	2
int32_t	0b1000	4
uint32_t	0b1001	4

1.3 Sensor Raw Data Conversion Instructions

All data types (except for arrays) are split in the same way as floats.
When packing, the low byte comes first.

typedef union {
    union bits_32_raw_data {
        uint32_t uint32_t_raw_data;
        int32_t  int32_t_raw_data;
        float    float_raw_data;
    };
    uint8_t bits_32_convert_data[4];
} bits_32_type_convert_t;

data[0] = bits_32_convert_data[0];
data[1] = bits_32_convert_data[1];
data[2] = bits_32_convert_data[2];
data[3] = bits_32_convert_data[3];