Thanks for you help.
Now it compile, but there are a lot of errors due to multiple definition.:

here is a part of my log:

libraries\IRremoteESP8266\IRrecv.cpp.o:(.bss.irparams+0x0): multiple definition of `irparams'

sketch\src\IRrecv.cpp.o:(.bss.irparams+0x0): first defined here

c:/users/frank/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9-2/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: Warning: size of symbol `irparams' changed from 16 in sketch\src\IRrecv.cpp.o to 208 in libraries\IRremoteESP8266\IRrecv.cpp.o

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::decode(decode_results*, irparams_t*)':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:105: multiple definition of `IRrecv::disableIRIn()'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:156: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::resume()':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:111: multiple definition of `IRrecv::resume()'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:162: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::enableIRIn()':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:88: multiple definition of `IRrecv::enableIRIn()'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:139: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::matchMark(unsigned int, unsigned int, unsigned char, short)':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:415: multiple definition of `IRrecv::matchMark(unsigned int, unsigned int, unsigned char, short)'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:603: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::matchSpace(unsigned int, unsigned int, unsigned char, short)':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:436: multiple definition of `IRrecv::matchSpace(unsigned int, unsigned int, unsigned char, short)'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:626: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::compare(unsigned short, unsigned short)':

C:\Users\Frank\Documents\Arduino\libraries\IRremoteESP8266\src/IRrecv.cpp:462: multiple definition of `IRrecv::compare(unsigned short, unsigned short)'

sketch\src\IRrecv.cpp.o:sketch\src/IRrecv.cpp:654: first defined here

libraries\IRremoteESP8266\IRrecv.cpp.o: In function `IRrecv::decodeHash(decode_results*)':

Do you have any idea?

Hi,
I try to use a github project for my house(https://github.com/emc2cube/MySWeMosIRShield)
I'll try to compile the code but there are a lot of errors.
I don't know why, this code can't compile.
I've choosen Wemos D1 R1 board, my arduino IDE version is 1.8.6.
I've tried to use mysensor library v2.3.0 and v2.2.0, always the same error message:

ATTENTION : Faux .ci dossier dans la bibliothèque 'MySensors'
ATTENTION : Faux .mystools dossier dans la bibliothèque 'MySensors'
In file included from C:\Users\Frank\Documents\Arduino\libraries\MySensors-master/MySensors.h:420:0,

             from C:\Users\Frank\Documents\Arduino\sketch_aug20a\sketch_aug20a.ino:141:

C:\Users\Frank\Documents\Arduino\libraries\MySensors-master/hal/architecture/ESP8266/MyMainESP8266.cpp:57:53: error: declaration of C function 'void ets_update_cpu_frequency(int)' conflicts with

extern "C" void ets_update_cpu_frequency(int freqmhz);

                                                 ^

In file included from C:\Users\Frank\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\cores\esp8266/pgmspace.h:10:0,

             from C:\Users\Frank\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\cores\esp8266/Arduino.h:256,

             from sketch\sketch_aug20a.ino.cpp:1:

C:\Users\Frank\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2/tools/sdk/include/ets_sys.h:218:6: error: previous declaration 'void ets_update_cpu_frequency(uint32_t)' here

void ets_update_cpu_frequency(uint32_t ticks_per_us);

  ^

C:\Users\Frank\Documents\Arduino\sketch_aug20a\sketch_aug20a.ino: In function 'void dumpRaw(decode_results*)':

sketch_aug20a:616:39: error: 'USECPERTICK' was not declared in this scope

 uint32_t x = results->rawbuf[i] * USECPERTICK;

                                   ^

C:\Users\Frank\Documents\Arduino\sketch_aug20a\sketch_aug20a.ino: In function 'void dumpCode(decode_results*)':

sketch_aug20a:647:39: error: 'USECPERTICK' was not declared in this scope

 Serial.print(results->rawbuf[i] * USECPERTICK, DEC);

                                   ^

Plusieurs bibliothèque trouvées pour "WiFiClient.h"
Utilisé : C:\Users\Frank\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\libraries\ESP8266WiFi
Non utilisé : C:\Program Files (x86)\Arduino\libraries\WiFi
Non utilisé : C:\Program Files (x86)\Arduino\libraries\WiFi
Non utilisé : C:\Program Files (x86)\Arduino\libraries\WiFi
Non utilisé : C:\Program Files (x86)\Arduino\libraries\WiFi
exit status 1
'USECPERTICK' was not declared in this scope

Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\bootloaders. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\cores. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\doc. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\libraries. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\package. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\tests. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\tools. Version pre-1.5 ?
Impossible de trouver boards.txt dans C:\Users\Frank\Documents\Arduino\hardware\esp8266com\variants. Version pre-1.5 ?
WARNING: Error loading hardware folder C:\Users\Frank\Documents\Arduino\hardware\esp8266com
Aucune définition de matériel valide n'a été trouvée dans le dossier esp8266com.

Could you help me please?