Amazon.com: 5.5 x 2.1mm Extension Cable with Router Rebooter (10 Inches Length), Works with AC Adapter to Reboot WiFi Router/Modem/Switch/IP Camera Automatically, Refresh Your Network Connection Regularly : Electronics
For $3 You Can Build a Device to Automatically Reset Your Router | designnews.com
Wi-Fi Router Reset 2 Pack, Smart Plug Auto Monitor and Restart Wi-Fi Router/Modem/Access Points if Wi-Fi Fails, Auto Power Cycler for Routers, Works with REC App - Walmart.com
Micro Center - How to adjust Auto Reboot Maintenance on a Tenda AC15
Automatically Restart Your Modem and Router if Internet Goes Down with ResetPlug - YouTube
How To Automatically Reboot WiFi Router | Schedule Auto Restart of WiFi router - YouTube