I’ve (actually my dad, I set it up for him) been using opensprinkler v2.2 (bought fully assembled) for over a year without issues. A month back, he complained that it was no longer working – the HTTP connections used to hang. I tried to reset it, but no luck.
I saw that a new firmware was out and decided to flash it. I downloaded the updater and tried updating the FW. It says
verification error, first mismatch at byte 0x0000
0x0c != 0x62
verification error; content mismatch