EPSON L3250 Series Waste Ink Counter Reset Using SNMP Protocol (Remove Service Required)

L3250_Reset.py

import re
from easysnmp import Session
from pprint import pprint
from struct import pack, unpack

printer_ip = "10.0.0.222"


session = Session(hostname=printer_ip, community="public", version=1, timeout=1)
password = [74, 54]

debug = False


def read_eeprom_addr(addr: int) -> str:
    split_addr = unpack("BB", pack(">H", addr))
    oids = f"1.3.6.1.4.1.1248.1.2.2.44.1.1.2.1.124.124.7.0.{password[0]}.{password[1]}.65.190.160.{split_addr[1]}.{split_addr[0]}"
    response = session.get(oids).value
    response = re.findall(r"EE:[0-9A-F]{6}", response)[0][3:]
    chk_addr = (int(response[:2], 16), int(response[2:4], 16))
    value = response[4:6]
    if split_addr != chk_addr:
        raise ValueError(
            f"Address and response address are not equal: {split_addr} != {chk_addr}"
        )
    if debug:
        print(f"Address: {split_addr} {hex(addr)} Value: 0x{value}")
    return value


def write_eeprom(addr: int, value: int):
    split_addr = unpack("BB", pack(">H", addr))
    value_before = read_eeprom_addr(addr)
    oids = f"1.3.6.1.4.1.1248.1.2.2.44.1.1.2.1.124.124.16.0.{password[0]}.{password[1]}.66.189.33.{split_addr[1]}.{split_addr[0]}.{value}.78.98.115.106.99.98.122.98"
    session.get(oids).value
    value_after = read_eeprom_addr(addr)

    if debug:
        print(
            f"Address: {split_addr} {hex(addr)}, Value Before: 0x{value_before}.  Value After: 0x{value_after}"
        )

    if value != int(value_after, 16):
        raise ValueError(
            f"Failed to write value to Address {split_addr} {hex(addr)}, Value:{value}"
        )


def read_eeprom_multi(addrs: list[int]) -> list[str]:
    return [read_eeprom_addr(oid) for oid in addrs]


def transform_addrs(base_addr: int, end_addrs: list[int]):
    return list(map(lambda n: ((base_addr << 8) | (n & 0xFF)), end_addrs))


def read_error_logs():
    for i in range(0, 5):
        address = [32 + (2 * i), 32 + (2 * i) + 1]
        address = transform_addrs(0x1, address[::-1])
        code = int("".join(read_eeprom_multi(address)), 16)
        print(f"Last printer falal error code {i+1} : {code} ({hex(code)})")

    for i in range(0, 5):
        address = [39 + (1 * i)]
        address = transform_addrs(0x7, address[::-1])
        code = int("".join(read_eeprom_multi(address)), 16)
        print(f"Last printer scanner error code {i+1} : {code} ({hex(code)})")

    for i in range(0, 5):
        address = [244 + (2 * i), 244 + (2 * i) + 1]
        address = transform_addrs(0x7, address[::-1])
        code = int("".join(read_eeprom_multi(address)), 16)
        print(f"Last general scanner error code {i+1} : {code} ({hex(code)})")


def reset_error_logs():
    for i in range(0, 5):
        address = [32 + (2 * i), 32 + (2 * i) + 1]
        address = transform_addrs(0x1, address[::-1])
        write_eeprom(address[0], 0x0)
        write_eeprom(address[1], 0x0)

    for i in range(0, 5):
        address = [39 + (1 * i)]
        address = transform_addrs(0x7, address[::-1])
        write_eeprom(address[0], 0x0)

    for i in range(0, 5):
        address = [244 + (2 * i), 244 + (2 * i) + 1]
        address = transform_addrs(0x7, address[::-1])
        write_eeprom(address[0], 0x0)
        write_eeprom(address[1], 0x0)


def read_waste_counter():
    waste_counter1 = int(
        "".join(read_eeprom_multi(addrs=transform_addrs(0x0, [48, 49][::-1]))), 16
    )
    waste_counter2 = int(
        "".join(read_eeprom_multi(addrs=transform_addrs(0x0, [50, 51][::-1]))), 16
    )
    waste_counter3 = int(
        "".join(read_eeprom_multi(addrs=transform_addrs(0x0, [252, 253][::-1]))), 16
    )
    print(f"Waste Counter 1 : {(waste_counter1 / 6345) * 100}%")
    print(f"Waste Counter 2 : {(waste_counter2 / 3416) * 100}%")
    print(f"Waste Counter 3 : {(waste_counter3 / 1300) * 100}%")


model = session.get("1.3.6.1.2.1.1.5.0").value
serial = "".join(
    chr(int(value, 16))
    for value in read_eeprom_multi(
        addrs=transform_addrs(0x6, [68, 69, 70, 71, 72, 73, 74, 75, 76, 77])
    )
)

print(f"Device Model: {model}")
print(f"Serial No: {serial}")

read_error_logs()
# reset_error_logs()


read_waste_counter()
print("Resetting...")

# waste counters [two bytes]
for value in transform_addrs(0x0, [48, 49, 50, 51, 252, 253]):
    write_eeprom(value, 0)

read_waste_counter()

requirements.txt

easysnmp==0.2.6