Arduino MEGA + ESP8266 WIFI Inbuilt Board

[supekshala]

I recently started a project to read analog values from arduino mega and send those values to the REST API endpoint using POST.
To do this I brought an Arduino MEGA + ESP8266 WIFI Inbuilt Board board. I think I really messed up with firmware. I can upload sketches to mega but I can't connect to the ESP module. (I have tried with the DIP switch). Could you help me to find the right firmware and fix this? That would a huge help.
Thank You!

[JAndrassy]

the Mega+WiFi is the ideal board for this library.
switch the switches to connect CH340 to esp8266 (5 and 6 ON and 7 too for esp8266 flashing mode) and upload AT firmware. see the README for AT firmware versions and upload commands.
then switch CH340 to ATmega and ATmega to esp8266 (1 to 4 ON, 5,6,7 off) and the Serial3 switch to Serial3.
in WiFiEspAT example sketches then always change Serial1 to Serial3.

[supekshala]

Thank you! I upgrade the firmware but still AT commands not working. I got this

Firmware installation

[JAndrassy]

as I write in the README for AT 1.7.4 use:
esptool.py write_flash --flash_size 2MB-c1 0x0 boot_v1.7.bin 0x01000 at/1024+1024/user1.2048.new.5.bin 0x1fb000 blank.bin 0x1fc000 esp_init_data_default_v08.bin 0xfe000 blank.bin 0x1fe000 blank.bin

[supekshala]

THANK YOU it worked!!

[Bordman-ger]

Hi, after spending hours to get this done on my device I want to add a hint: I am Windows user and tried to get the Flash_download_tool.EXE running- with lot of errors and hints on other sides (new version 3.9.3 is faulty, Memsize can not be set, factory mode to be used etc....) I finaly gave up und used the Python Tool... and it worked like a charm!
So do not waste time with the Windows Exe... it seems not to work any longer...