Here is a short piece of code which can help you to redirect your html, wordpress or other site to redirect to additional mobile site while visiting your site from smaller screen (like mobile, tablet,tab etc)
*** if you want to use this code, change the “screen.width” and “YOUR MOBILE SITE URL” value as per your requirement.
<script type="text/javascript">
if(window.location.hash != '#mobile=off') {
if (screen.width <= 1023) {
document.location =
"YOUR MOBILE SITE URL";
}
}
</script>
All About Basic 