diff --git a/Makefile b/Makefile
index 391df65..4e4b383 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ client:
 	$(MAKE) -C src/client/ CC=$(CC) OUT=$(PWD) CONF=$(CONF)
 
 logger:
-	@echo "---------- Building client..."
+	@echo "---------- Building logger..."
 	CFLAGS=$(CFLAGS) \
 	$(MAKE) -C src/logger/ CC=$(CC) OUT=$(PWD) CONF=$(CONF)
 
@@ -26,4 +26,4 @@ clean:
 	$(MAKE) clean -C src/client/	
 	$(MAKE) clean -C src/logger/
 
-.PHONY: clean publisher client
+.PHONY: clean publisher client logger
diff --git a/config.mk b/config.mk
index 29fdf7c..f37dfdf 100644
--- a/config.mk
+++ b/config.mk
@@ -1,2 +1,3 @@
 PUBLISHER_PORT=5556
-PUBLISHER_ADDR=localhost
\ No newline at end of file
+PUBLISHER_ADDR=localhost
+LOGGER_DIR=./logs
\ No newline at end of file
diff --git a/logger b/logger
index 1b7bc83..6ff6c31 100755
Binary files a/logger and b/logger differ
diff --git a/src/logger/Makefile b/src/logger/Makefile
index ad4f0ca..fc04b6d 100644
--- a/src/logger/Makefile
+++ b/src/logger/Makefile
@@ -1,8 +1,11 @@
 include $(CONF)
 EXEC=logger
 
+DEFINES=\
+-DLOGGER_DIR=$(LOGGER_DIR)
+
 all: main.c
-	$(CC) $^ -o $(OUT)/$(EXEC) $(CFLAGS)
+	$(CC) $^ -o $(OUT)/$(EXEC) $(CFLAGS) $(DEFINES)
 
 clean:
 	rm -f $(OUT)/$(EXEC)
diff --git a/src/logger/main.c b/src/logger/main.c
index a9bbb50..6ee3ac8 100644
--- a/src/logger/main.c
+++ b/src/logger/main.c
@@ -4,10 +4,35 @@
 #include <zmq.h>
 #include <assert.h>
 #include <time.h>
+#include <stdlib.h>
 #include <string.h>
+#include <libgen.h>
+#include <unistd.h>
+
+
+void start(char *power_path);
 
 int main (int argc, char *argv [])
 {
-   
-    return 0;
+  if(argc != 2){
+    printf("Usage: %s <sysfs-path>",argv[0]);
+    exit(1);
+  }
+
+  // Extract bus id and ina260 chip address
+  char busid[10];
+  char chipaddr[10];
+  char *base=basename(argv[1]);
+  sscanf(base,"%[^-]-%[^-]",busid,chipaddr);
+
+  start("/home/loic/out.txt");
+
+  return 0;
+}
+
+void start(char *power_path){
+  if (access(power_path, F_OK) != 0){
+    printf("Could not read %s\n",power_path);
+    exit(2);
+  }
 }
\ No newline at end of file
diff --git a/src/utils.h b/src/utils.h
index 4761b04..8e15094 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -1,10 +1,3 @@
 #define STR(symbol) #symbol
 #define STRINGIFY(symbol) STR(symbol)
 
-#ifndef PUBLISHER_PORT 
-#error PUBLISHER_PORT undefined
-#endif
-
-#ifndef PUBLISHER_ADDR 
-#error PUBLISHER_ADDR undefined
-#endif