diff --git a/src/logger.c b/src/logger.c
index 9be93cd..c65c3da 100644
--- a/src/logger.c
+++ b/src/logger.c
@@ -47,7 +47,7 @@ int main (int argc, char *argv [])
     printf("Log interval is too small (min=%ds)\n",MIN_INTERVAL);
     exit(2);
   }
-  if(!FILE_EXISTS(__regpower)){
+  if(FILE_EXISTS(__regpower)){
     printf("Logger cannot access to %s\n",__regpower);
     exit(3);
   }
@@ -55,6 +55,18 @@ int main (int argc, char *argv [])
   //----- Start logging
   printf("Logger started [client=%s,interval=%ds]\n",__client,__loginterval);
 
+  FILE *regptr,*logptr;
+  char logfilepath[255]="";
+  regptr=fopen("/home/loic/out.txt","r");
+  
+  *logfilepath='\0';
+  sprintf(logfilepath,"%s/%ld",__logdir,INTERVAL(TIMESTAMP(),__loginterval));
+  logptr=fopen(logfilepath,"w");
+  fprintf(logptr,"timestamp,power\n");
+  fclose(logptr);
+  
+  fclose(regptr);
+
   // Extract bus id and ina260 chip address
   /*char busid[10];
   char chipaddr[10];