# Perform CRC-4 calculation crc = 0 for digit in serial_number: crc = (crc << 1) ^ (crc & 0x8) crc = crc ^ int(digit)
# Convert CRC to 4-digit code code = crc % 10000 return f"{code:04d}"
Do you have any specific questions or aspects related to the Blaupunkt radio code algorithm you'd like to discuss?
