What is E1? If you see a message on the LCD screen, can you please post it here? I don’t know what E1 means.
Did you copy files to the SD card? As I said, there is a README.txt in the firmware folder, please take a look at it. If you don’t know where it is, here is the online copy of the file:
https://github.com/rayshobby/opensprinkler/blob/master/OpenSprinkler%20Controller/software/compiled/hardware%20v2.0/firmware2.0.2/README.txt