Blaupunkt Radio Code Algorithm May 2026

The algorithm used to generate these codes is a proprietary secret, but over the years, enthusiasts and reverse engineers have worked together to figure out the general principles behind it.

# Perform CRC-4 calculation crc = 0 for digit in serial_number: crc = (crc << 1) ^ (crc & 0x8) crc = crc ^ int(digit) blaupunkt radio code algorithm

# Convert CRC to 4-digit code code = crc % 10000 return f"{code:04d}" The algorithm used to generate these codes is