Data types and encoding standards

Data types

Type	JSON	Description	Examples	Limitations
Integer	Number	Integer numeric values	Bit masks, counters, impulses, passengers and RPM	From 1 to 8 byte signed or unsigned integer number
Float	Number	Numeric floating-point values	Coordinates, telemetry, speed, altitude, mileage	Up to 8 byte signed float number (IEEE 754)
String	String	UTF-8 encoded text string	Driver's name, registration number, driver ID	Up to 10KB escaped text
Boolean	Boolean	Values true or false	CAN attributes states: ignition state, doors state, presence of movement, etc.	True or false
Timestamp	String	Date and time value in ISO 8601 UTC format	Date and time when the coordinate was received by the device	ISO 8601 related restrictions
Blob	String	Binary data in Base-64 format	Photo, raw data from sensors, BLE data, Voice	Up to 1 MB encoded binary data
Array	Array	A list of objects with identical types	Mobile cells, Wi-fi points	No limitations
Object	Object	Structures that consist of several attributes	Location data, Mobile cell, Wi-fi point	No limitations

Timestamps and data encoding

All timestamps must adhere to the ISO 8601 format.

Example:

• "message_time": "2024-09-02T23:59:59Z"

For raw data such as sensor readings, tachograph logs, images, or audio, binary transmission is supported. When transmitting binary data, it must be Base64-encoded.

Examples:

• "my_sensor_data": "SGVsbG8gd29ybGQh"

• "tachograph_log": "U29tZSB0YWNoZW9nIGxvZw=="

• "photo": "/9j/4AAQSkZJRgABAQEAYABgAAD..."

• "audio": "UklGRjIAAABXRUJQVlA4WAoAAAAQAAAA..."

By adhering to these standards, the protocol ensures universal understanding of timestamps and reliable transmission of binary data. Keep in mind, the protocol is not optimized for large binary payloads within messages.

Continue reading to learn about Message structure and attributes in Navixy Generic Protocol.