This is an issue to track work on a new OH4/5 dd-wrt binding. There is a legacy OH ddwrt binding but seems to be abandoned. There is also a asuswrt client but the binding is bound to the asuswrt web interface and will not work with general dd-wrt. It is possible to use the existing SNMP binding to monitor dd-wrt but it is difficult.

Desired Features:

• 1. Support multi access point and mesh networks (one router with many APs)
• 2. List wireless clients (MAC, hostname, IP, associated AP, channel, SNR, RX/TX rate, etc.)
• 3. AP/router (temp, CPU load, IF in/out)
• 4. router (external IP, WAN in/out)
• 5. Enable/disable radio
• 6. Enable/disable firewall rules
• 7. reboot router

References:
https://community.home-assistant.io/t/monitor-dd-wrt-cpu-temp-load-and-free-ram-how-i-did-it/140470
https://github.com/bradut/DD-WRT_API
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324733&start=15&sid=38410cbbfa06dc44c93a34bfadaa7d91