Added reference to esp32_ethernet_router

Author: martin-ger

README.md

@@ -32,7 +32,9 @@ This is a firmware to use the ESP32 as WiFi NAT router. It routes between the ne
 - **MCP Bridge (AI-Ready)**: BETA - Control the router from AI assistants (Claude, etc.) via the Model Context Protocol
 - **OTA Updates**: Flash new firmware directly from the Web UI
 
-The maximum number of simultaniously connected WiFi clients is 8 (5 on the ESP32c3) due to RAM limitations (uses about 5KB per client). Each of the features: Web Interface, PCAP Capture, Wireguard VPN, Remote Console, WPA Enterprise and MQTT Home Assistant require several KB of additional RAM. So using all of them at once will probably burst the ESP32's ressources. Have a look at remaining heap size if in doubt.
+The maximum number of simultaniously connected WiFi clients is 8 (5 on the ESP32c3) due to RAM limitations (uses about 5KB per client). Each of the features: Web Interface, PCAP Capture, Wireguard VPN, Remote Console, WPA Enterprise and MQTT Home Assistant require several KB of additional RAM. So using all of them at once will probably burst the ESP32's ressources. Unused/disabled features are optimized for minimal to no RAM usage. Have a look at remaining heap size if in doubt.
+
+If you are looking for an ESP32 router with **WiFi STA as uplink** (Internet) and **Ethernet as downlink** (LAN), check out [esp32_ethernet_router](https://github.com/martin-ger/esp32_ethernet_router).
 
 The code is originally based on the [Console Component](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/console.html#console) and the [esp-idf-nat-example](https://github.com/jonask1337/esp-idf-nat-example).