I finally hooked up my ESP-01 to my UNO and your code is working for me as well. One thing that I do have to point out is that “#define EspSerial Serial1” does not work on an UNO. The correct line is “#define EspSerial Serial”. Found this on another forum:
Arduino Uno doesn’t have Serial1, only Serial:
Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the ATmega8U2 USB-to-TTL Serial chip.
I’m not exactly sure what they mean by Arduino Uno doesn’t have Serial1, only Serial.