Donc l'erreur c'est :
'rf12_initialize_overide_ITP' was not declared in this scope
programme_final.ino : in function 'void setup() ' :
programme_final:65 error 'rf12_initialize_overide_ITP' was not declared in this scope
programme_final.ino: In function 'void loop()':
programme_final:171: error: a function-definition is not allowed here before '{' token