Download a pre-compiled HEX file from the OpenEVSE Sources for your OpenEVSE product and your desired configuration.
Download the latest firmware and save files into a local folder. You will need 3 files: flash.bat, open_evse.hex and eeprom_24.bin
Run the flash.bat file. Programming and verification should take about 60 seconds.
If the command window pops up and goes away immediately there is a problem with the Device driver and/or the WinAVR installation.
Warning can not set SCK period is normal and can be ignored.
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