Hi,

Download the latest release release file

In this example ESPEasy_ESP82xx_mega-20210223.zip
Extract it

michael@debdev ~/Downloads # unzip ESPEasy_ESP82xx_mega-20210223.zip

Create a python virtual env

michael@debdev ~ # sudo apt install python3-pip python3-venv
michael@debdev ~ # python3 -m venv ~/esptool
michael@debdev ~ # source ~/esptool/bin/activate
[esptool] michael@debdev ~ # python3 -m pip install setuptools wheel esptool

And flash

[esptool] michael@debdev ~ #  esptool.py  --baud 115200 write_flash -fs 1MB -fm dout 0x0 ~/Downloads/bin/ESP_Easy_mega_20210223normal_ESP8266_1M.bin

Connect to Accesspoint. Password: configesp

i2c -> GPIO-4 (D2) = SDA, GPIO-5 (D1) = SCL

Michael