Python script to rotate the machine IDs and OEM identifiers to find one that is eligible for a software update.

remarkable_find_update_device_id.py

#!/usr/bin/env python3

import time
import uuid
import random
import re
import sys

import requests

current_version = sys.argv[1]

orig_requestid = "f1aa8814-a007-46ad-aede-ae071cacccbe"
orig_sessionid = "2019ed24-e518-4a2c-96d2-af660a7bff97"
orig_appid = "98DA7DF2-4E3E-4744-9DE6-EC931886ABAB"
orig_bootid = "48cfc9fb-e90a-4ace-81aa-2b9eeb928e83"
orig_machineid = ""  #censored
orig_oem = ""  #censored
req = """<?xml version="1.0" encoding="UTF-8"?>
<request protocol="3.0" version="{current_version}" requestid="{{{requestid}}}" sessionid="{{{sessionid}}}" updaterversion="0.4.2" installsource="{installsource}" ismachine="1">
    <os version="codex 2.5.2" platform="reMarkable" sp="{current_version}_armv7l" arch="armv7l"></os>
    <app appid="{{{appid}}}" version="{current_version}" track="Prod" ap="Prod" bootid="{{{bootid}}}" oem="{oem}" oemversion="2.5.2" alephversion="{current_version}" machineid="{machineid}" lang="en-US" board="" hardware_class="" delta_okay="false" nextversion="0.0.0" brand="" client="" >
        <ping active="1"></ping>
        <updatecheck></updatecheck>
        <event eventtype="3" eventresult="2" previousversion=""></event>
    </app>
</request>"""
url = "https://get-updates.cloud.remarkable.engineering/service/update2"


def get_uuid():
    """Generate a random UUID.

    update_engine/utils.cc just reads this from /proc/sys/kernel/random/uuid
    """
    return str(uuid.uuid4())


def get_oem():
    base = "RM100"
    middle = "743"
    # middle = str(random.randint(500, 800))
    # end = # Censored
    end = str(random.randint(50000, 70000))

    return "-".join([base, middle, end])


# Support some exponential backoff when we recive a 429 from the server.
sleep_time = 10.0
while True:
    params = {
        "installsource": "scheduler",  # or "ondemandupdate"
        "requestid": get_uuid(),
        "sessionid": get_uuid(),
        # "appid": get_uuid(),
        # "bootid": get_uuid(),
        "machineid": get_uuid().replace("-", ""),
        "oem": get_oem(),
        # "requestid": orig_requestid,
        # "sessionid": orig_sessionid,
        "appid": orig_appid,
        "bootid": orig_bootid,
        "current_version": current_version
        # "machineid": orig_machineid
    }
    resp = requests.post(url, req.format(**params))

    if "noupdate" in resp.text:
        print(f"No update.. OEM: {params['oem']}")
    else:
        m = re.search("manifest version=[^>]*", resp.text)
        try:
            version = m.group(0).split("=")[1].replace('"', '')
        except:
            print("Regex failed:")
            print(resp.status_code)
            print(resp.text)
            version = ""
            if resp.status_code == 429:
                sleep_time *= 1.2
                print("429 received, backoff time set to %f" % sleep_time)

        if version < "2.3.0.0":
            print("Found update for version %s, trying again" % version)
        else:
            print("Found params to get update: ")
            print(params)
            print()
            print(resp.text)
            break

    time.sleep(sleep_time)