had a older TP link router worked fine.  decided to get new one for faster? speed.  most things at home (phone, lights) connected fine to new one.  all on 2.4ghz.    i have 2 FEIT security cameras will not connect to router.  i reset and reinstalled, no connections.  also i have a Rachio sprinkler controller that keeps losing connection and i have to manually reconnect to the WiFi.  i don't know what issue is.