:global ttemp [/system health get temperature]
:if ($ttemp >= 53) do={
/log info "Critical temperature : $ttemp"
/tool fetch mode=https url="https://olegon.ru/send_to_telegram.php" http-method=post http-data="message=WiFi%20Router:%20$ttemp%E2%84%83"
} else={
/log info "Temperature : $ttemp"
}