Decode Amazon Fire TV devices serial number information

aftvserial.py

#!/bin/python3

#
# Decode Amazon Fire TV devices serial number information
#
# Copyright(C) 2022 rw-r-r-0644
# This file is under GNU GPLv2+
#

from datetime import datetime, date
from dataclasses import dataclass

@dataclass
class ModelDescription:
	name: str
	codename: str
	release_year: int

ModelNoDescription = {
	# TODO: other devices model numbers (these were extracted from videos or unboxings)
	'G071CQ' : ModelDescription('Fire TV Stick Lite', 'sheldon', 2020),
	'G071EL' : ModelDescription('Fire TV Stick', 'sheldonp', 2020),
	'G061R2' : ModelDescription('Fire TV Stick 4K Max', 'kara', 2021),
}

def compute_production_year(model, year_dgt):
	rel_dgt = model.release_year % 10
	diff_years = (year_dgt - rel_dgt) % 10
	if diff_years >= 8:
		diff_years -= 10
	return model.release_year + diff_years

serial = input("Enter AFTV serial number: ").replace(" ", "")


modelno = serial[0:6]
modelinfo = ModelNoDescription[modelno]

unk0 = serial[6:8]

date_year = compute_production_year(modelinfo, int(serial[8]))
date_week = int(serial[9:11])
date_day = int(serial[11]) % 7
prod_date = datetime.strptime(f"{date_year} {date_week} {date_day}", "%Y %W %w")

serialno = serial[12:]

print(f"Model ID: {modelno}")
print("Production date: " + prod_date.strftime("%d/%m/%Y"))
print(f"Serial ID: {serialno}")