Join into this network and go to the home page to setup the ESP WIFI to Station Mode to join your intended network. During the first setup, the ESP will be in AP mode and the IP is 192.168.4.1.Serial(RX0/TX0) is to be connected to the computer for sketch upload to Mega 2560 using USB.
![wemos mega esp8266 firmware wemos mega esp8266 firmware](https://diyprojects.io/media/2017/03/espeasy-liste-device-bmp180--1024x239.png)
This is the bridge mode whereby ESP and Mega 2650 is communicating using Serial3 (RX3/TX3). But I also have some bare ESP-01 and ESP-12 modules lying around, and recently I came up with the plan to use one of them. Most of the time I am using Wemos D1 mini development boards in combination with the Arduino IDE to make my own firmware to run directly on the ESP8266 chip. It is a customized version of the classic ARDUINO MEGA R3 board. Restoring the AT firmware on the ESP8266.
![wemos mega esp8266 firmware wemos mega esp8266 firmware](https://ae01.alicdn.com/kf/HTB1_DgUaRKw3KVjSZTEq6AuRpXa4/For-WEMOS-Mega-WiFi-R3-ATmega2560-ESP8266-32Mb-memory-USB-TTL-Compatible-for-Arduino-Mega-NodeMCU.jpg)
Wemos mega esp8266 firmware update#
After flashing the ESP8266 set the jumper 1,2,3 & 4 to ON position and the rest OFF position. Via USB you can update sketches and firmware for ATmega328 and for ESP8266.
USB<->ESP8266 (Update firmware or sketch) OFF OFF OFF OFF ON ON ON.![wemos mega esp8266 firmware wemos mega esp8266 firmware](https://2.bp.blogspot.com/-cvoya8lG8gQ/WiDi7AI96EI/AAAAAAAA1ks/x76Bpb8pPWEjzXzDigjAioNRwRNLLNaJQCKgBGAs/s1600/20171201_125909.jpg)
Flashing the onboard ESP8266 requires some setting changes to the dip switches. open box Yale Cylindrical Lever Lockset 4700LN 5300LN 5400LN w/ 2 keys A2 New, DUMBARTON Carbide End Mill 500882-T-5 3FL TiCN 3', 6 Pin GX16-6P Butt Joint Type Plug Connector of Welding Control Line Extension. One of the tricky parts in this setup is the sequence of flashing the ESP firmware. WeMOS Mega ESP8266 USB-TTL For Arduino Mega NodeMCU S WiFi R3 ATmega2560.