A CRC implementation for ADS-B Mode-S messages
$ npm install --save modes-crc
Calculates the checksum of the data frame passed to it, based on the parity table provided.
### crc(data, [bits])Extracts the CRC value from a data frame last 3 bytes.
Tries to fix a single bit on a message by transversing it and xor'ing each bit and comparing that new message checksum with the original CRC value.
Pass it a buffer to the actual ADSB packet and the number of bits in the packet.
var checker = require('modes-crc')
var data = [93, 77, 32, 35, 122, 85, 166]
var packetChecksum = checker.checksum(data, checker.MODES_SHORT_MSG)
It will do a parity check and output a checksum that should be equal to the result of the packet CRC obtained by
var checker = require('modes-crc')
var data = [93, 77, 32, 35, 122, 85, 166]
var packetCrc = checker.crc(data, checker.MODES_SHORT_MSG)
A port of antirez's dump1090, but in Node.js: https://github.com/antirez/dump1090/
Keeps the 3-Clause BSD License from the "parent" repository
FAQs
A parity checker for ModeS transpoder messages
We found that modes-crc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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