有大佬知道这是为啥嘛，新人问
Arduino:1.8.5 (Windows 10), 开发板："Arduino/Genuino Uno"libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::RFID(int, int)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::RFID(int, int)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::writeMFRC522(unsigned char, unsigned char)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::reset()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::readMFRC522(unsigned char)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::setBitMask(unsigned char, unsigned char)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::antennaOn()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::clearBitMask(unsigned char, unsigned char)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::antennaOff()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::init()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::calculateCRC(unsigned char*, unsigned char, unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::MFRC522ToCard(unsigned char, unsigned char*, unsigned char, unsigned char*, unsigned int*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::MFRC522Request(unsigned char, unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::isCard()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::anticoll(unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::readCardSerial()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::auth(unsigned char, unsigned char, unsigned char*, unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::read(unsigned char, unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::write(unsigned char, unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::selectTag(unsigned char*)'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
libraries\RFID\RFID.cpp.o (symbol from plugin): In function `RFID::RFID(int, int)':
(.text+0x0): multiple definition of `RFID::halt()'
sketch\RFID.cpp.o (symbol from plugin):(.text+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
exit status 1
为开发板 Arduino/Genuino Uno 编译时出错。
在文件 -> 首选项开启
“编译过程中显示详细输出”选项
这份报告会包含更多信息。
新人你应该直接发个截图
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