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ESP8266_WIFI_UART

clone https://atadiat.com/en/e-esp8266-esp32-wifi-serial-bridge-converter/
Serial Bridge Using ESP8266 (Simpler)

hardware ESP-S or ESP-12S

esp-12s_product_specification_en.pdf
ESP-S_ESP-12S_module.JPG

tweak a little bit to source code

debug baud rate changed to 115200
dummy testing string "n\xiaolaba\n"

testing

open putty
host 192.168.4.1
port 8880
connection type : RAW

open arduino IDE serial port monitor
type something and send

test result

esp826_wifi_uart.JPG

firmware and burn

burn.bat
note : if not to use arduino IDE to burn firnware, close serial port monitor first before uses this BAT file to burn the firmware, otherwise port access failure and no code to be burned.

:: by xiaolaba, 2022-JAN-20  

set COM_PORT=COM11  
set BAUD_RATE=921600  
set FIRMWARE=wifi-serial.ino.bin  

%USERPROFILE%\AppData\Local\Arduino15\packages\esp8266\tools\python3\3.7.2-post1/python3 ^  
-I %USERPROFILE%\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2/tools/upload.py ^  
--chip esp8266 ^  
--port %COM_PORT% ^  
--baud %BAUD_RATE% ^  
--before default_reset ^  
--after hard_reset write_flash 0x0 %FIRMWARE%  


pause

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