ping_server:10: error: 'LiquidCrystal_I2C' does not name a type
ping_server.cpp: In function 'void setup()':
ping_server:22: error: 'lcd' was not declared in this scope
ping_server.cpp: In function 'void loop()':
ping_server:55: error: 'lcd' was not declared in this scope
请问这个是什么原因????
0023的编译不了,提示是
“In file included from sketch_apr15a.cpp:9:
F:\Arduino 正式\arduino-0023\libraries\Mirf/Mirf.h:30:21: error: Arduino.h: No such file or directory”