Can I pick data in ESP8266 from a micro-controller via RS232. Cause I plan to use ESP-NOW but so far only usable with devboard like WEMOS, NODEMCU etc, which don't have enough i/o nor analog. I want to talk to the ESP8266 and receive from it. On the PIC from microchip I can do the program but on the ESP8266 that another story. The goal is that the Master will send one byte to a slave then that slave will send back the data from the micro-controller. So I must able to read the byte from the slave ESP8266 and then send data back to the slave to be send. I'm not looking for the way ESP-NOW work, just the way between ESP8266 and the micro-controller. I will use Arduino to build the program for the ESP8266 so I must add some line to do my communication. Anyone have an idea or a site to look for ? Thanks at advance.
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