Flashing the ESP8266 from windows.
Install programer serial drivers.
Put the esp8266 in to bootloader by pressing gp0 while pluging in.
Download the latest firmware.bin from https://github.com/OpenEVSE/ESP8266_WiFi_v2.x/releases
Then download https://github.com/Rodmg/esptool-gui/releases
Extract the win32.zip file, run the esptool-gui.exe
Select the correct com port, firmware.bin and press upload
For the OpenEVSE firmware
Install the drivers for the programer
Create a folder
Download the firmware from https://github.com/openenergymonitor/open_evse/releases/
Rename file to open_evse.hex
Download the bat file and .bin file from https://github.com/OpenEVSE/open_evse/releases
Connect the OpenEVSE and run the bat file. when completed (about 60 seconds) close the dos windows do not press any key or it will flash again.
ALL DONE .