For e-loading keypad setup, you need to add Arduino because ESP8266 boards have limited PINS. Just connect the Arduino's TX to ESP8266's RX. If they are on different power adapter source, link the module's ground. Please refer to arduino_for_keypad for more information. If you are looking for the configuration guide, refer to ESP8266 Configuration Guide.
Softwares to Download:
After downloading the needed softwares, connect the ESP8266 Board to your PC and determine the COM Port.
Open PyFlasher. Set proper COM PORT.
Browse the ESP8266 firmware you downloaded (esp8266-firmware-xxxxx.bin).
Set the Baud Rate to 115200.
Softwares to Download:
After downloading the needed softwares, connect the ESP8266 Board to your Android phone via OTG. Make sure you enable the OTG setting on your android.
Open ESP8266 Loader App and tap Allow on the permission prompts.