if (is_numeric($power2)) {
    $state_name = 'power2State';
    $states = [
        ['value' => 0, 'generic' => 2, 'graph' => 0, 'descr' => 'off'],
        ['value' => 1, 'generic' => 0, 'graph' => 0, 'descr' => 'on'],