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By dbetz
#186929
I have a ESP8266 Thing Dev module and I'd like my sketch to be able to use the TX and RX pins on the ESP8266 to talk to another MCU. Is this possible or will the onboard FTDI chip interfere with my communications? I've tried this and the data I send from TX seems to reach the other MCU but data that the MCU sends is not received on the RX pin of the ESP8266. I am using a 1K resistor between the TX of the MCU and the RX of the ESP8266. I can see data at the TX pin of the MCU but nothing on the RX pin of the ESP8266 on the other side of the 1K resistor. How do I use the RX pin on the ESP8266 for receiving input from another MCU?