OpenSprinkler › Forums › OpenSprinkler Unified Firmware › ESP32 port of 2.1.9 firmware › Reply To: ESP32 port of 2.1.9 firmware June 17, 2023 at 8:40 am #76124 Ken.238Participant @v1pr I need help from you. For some reason I had had an error when compile. *** [.pio\build\esp32_sprinkler\src\OpenSprinkler.cpp.o] Error 1. Do I missing something. Thanks.