:local DeviceName [/system identity get name];
:local Date [/system clock get date];
:local Time [/system clock get time];

:local CheckUpdate [/system package update check-for-updates as-value];
:local Channel ($CheckUpdate -> "channel");
:local InstalledVersion ($CheckUpdate -> "installed-version");
:local LatestVersion ($CheckUpdate -> "latest-version");

:log info "Script CheckUpdate - Run.";

:if ($InstalledVersion != $LatestVersion) do={
    :local TelegramMessageText "MikroTik RouterOS - New version $LatestVersion is available! %0D%0A Installed version $InstalledVersion, chanell $Channel. %0D%0A <a href=\"https://mikrotik.com/download/changelogs\">Changelogs</a>";
    :log info "Script CheckUpdateSimple - New version is available, send notify."
    :local BotToken "TOKEN";
    :local ChatID "CHATID";
    :local ParseMode "html";
    :local DisableWebPagePreview True;
    :local SendText "\F0\9F\93\A6 <b>UPDATE $DeviceName [$Date $Time]:</b> %0D%0A $TelegramMessageText";
    :local tgUrl "https://api.telegram.org/bot$BotToken/sendMessage?chat_id=$ChatID&text=$SendText&parse_mode=$ParseMode&disable_web_page_preview=$DisableWebPagePreview";
    /tool fetch url=$tgUrl keep-result=no;
    } else={
:log info "Script CheckUpdate - System is already up to date.";
};
:delay 1;
:log info "Script CheckUpdate - Completed.";

/system script run CheckUpdate