A JavaScript library for exchanging structured data with small embedded devices using COBS, CRC-16 and a CBOR subset.
npm install cobs-crc16-cbor-utilscobs-crc16-cbor-utilsA JavaScript library for exchanging structured data with small embedded devices using COBS, CRC-16 and a CBOR subset.
- Implements encoders and decoders for the "Consistent Overhead Byte Stuffing (COBS)"
- See Wikipedia article for details
- Implements a CRC-16-CCITT calculation, encoders and decoders
- See Wikipedia article for details
- Implements encoders and decoders for a subset of the "Concise Binary Object Representation (CBOR)" specification
- See Specification for details
- Implements combining encoders and decoders
- COBS <--> CBOR
- COBS <--> CRC-16
- COBS <--> CRC-16 <--> CBOR
- Zero production dependencies
- High test coverage
- Lack of documentation
- CBOR implementation does not support
- Integers larger than 32-bit
- Floating point numbers
- Tags
``
yarn add cobs-crc16-cbor-utils
The library exports two byte stream encoder classes:
- CobsEncoder: packetizes a byte stream using COBSCobsCrc16Encoder
- : appends a CRC16 to a byte stream and packetizes that using COBS
Both are EventEmitters and emit data events whenever they have encoded a chunk of bytes. The data gets fed in using the encodeData method, which can be called multiple times to incrementally deliver the byte stream to encode. Once a byte stream has reached its end, the encodeDelimiter method must be called to flush buffered data and reset the encoder/decoder for a new byte stream.
The library exports three value encoder classes:
- CborEncoder: encoded a value into its CBOR byte stream representationCobsCborEncoder
- : encodes a value into its CBOR byte stream representation and packetizes it using COBS (by feeding it through a CobsEncoder)CobsCrc16CborEncoder
- : encodes a value into is CBOR byte stream representation, appends a CRC16 and packetizes that using COBS (by feeding it through a CobsCrc16Encoder)
They also are EventEmitters and emit data events whenever they have encoded a chunk of bytes.
The library exports two byte stream decoder classes:
- CobsDecoder: decodes a COBS byte stream into packetsCobsCrc16Decoder
- : decodes a COBS byte stream into packets, checking the appended CRC16
Both are EventEmitters and emit packet events whenever a packet was successfully decoded (and optionally its CRC was correct).
The library exports two value decoder classes:
- CobsCborDecoder: decodes a CBOR value from a COBS packetCobsCrc16CborDecoder
- : decodes a CBOR value from a COBS packet that included a CRC16 at the end
Both are EventEmitters and emit packet events whenever a value was sucessfully decoded.
`
The MIT License (MIT)
Copyright (c) 2024-present, Daniel Wippermann.
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of this software and associated documentation files (the "Software"), to deal
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``