martinayotte wrote:Those links show how to communicate ESP with Nano using SoftwareSerial, but none of them showing how to use Nano to upload sketches in ESP without the needs of separate USB-Serial.
Oh, really? I didn't know that! So, if I used SoftwareSerial, would I be using the Nano as the main microcontroller with the ESP as a sort of attachment instead of the ESP being the main microcontroller?