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By llrjt100
#40848 I have existing reliable code which uses an Ethernet Shield R3 with a Teensy MCU to serve a configuration webpage on one port and a serial command interface on another port (TCP Serial bridge?). I want to replace the Ethernet Shield with the ESP8266 with minimum recoding.

As far as I can see, there are two basic approaches:
1. AT commands. I have a web server running with AT commands. Is it possible to establish an AP mode TCP/UDP link with AT commands - a simple serial bridge?
2. Lua or Arduino code running on the ESP8266.

I'd be grateful for any advice please :-)