diff --git a/include/meter.h b/include/meter.h
index 3d3893c..fb0fb43 100644
--- a/include/meter.h
+++ b/include/meter.h
@@ -91,6 +91,7 @@ typedef struct {
 
 	/* function pointers */
 	int (*init_func)(meter_t *mtr, list_t options);
+	void (*free_func)(meter_t *mtr);
 	int (*open_func)(meter_t *mtr);
 	int (*close_func)(meter_t *mtr);
 	size_t (*read_func)(meter_t *mtr, reading_t *rds, size_t n);
diff --git a/include/protocols/d0.h b/include/protocols/d0.h
index 4b32fd8..87a14e9 100644
--- a/include/protocols/d0.h
+++ b/include/protocols/d0.h
@@ -47,6 +47,7 @@ struct meter;
 struct reading;
 
 int meter_init_d0(struct meter *mtr, list_t options);
+void meter_free_d0(struct meter *mtr);
 int meter_open_d0(struct meter *mtr);
 int meter_close_d0(struct meter *mtr);
 size_t meter_read_d0(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/exec.h b/include/protocols/exec.h
index 71494af..588a34f 100644
--- a/include/protocols/exec.h
+++ b/include/protocols/exec.h
@@ -38,6 +38,7 @@ struct meter;
 struct reading;
 
 int meter_init_exec(struct meter *mtr, list_t options);
+void meter_free_exec(struct meter *mtr);
 int meter_open_exec(struct meter *mtr);
 int meter_close_exec(struct meter *mtr);
 size_t meter_read_exec(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/file.h b/include/protocols/file.h
index 232c3d5..b39ad8e 100644
--- a/include/protocols/file.h
+++ b/include/protocols/file.h
@@ -41,6 +41,7 @@ struct meter;
 struct reading;
 
 int meter_init_file(struct meter *mtr, list_t options);
+void meter_free_file(struct meter *mtr);
 int meter_open_file(struct meter *mtr);
 int meter_close_file(struct meter *mtr);
 size_t meter_read_file(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/fluksov2.h b/include/protocols/fluksov2.h
index 24754f3..0df8cac 100644
--- a/include/protocols/fluksov2.h
+++ b/include/protocols/fluksov2.h
@@ -26,6 +26,8 @@
 #ifndef _FLUKSOV2_H_
 #define _FLUKSOV2_H_
 
+#define FLUKSOV2_DEFAULT_FIFO "/var/run/spid/delta/out"
+
 typedef struct {
 	char *fifo;
 
@@ -37,6 +39,7 @@ struct meter;
 struct reading;
 
 int meter_init_fluksov2(struct meter *mtr, list_t options);
+void meter_free_fluksov2(struct meter *mtr);
 int meter_open_fluksov2(struct meter *mtr);
 int meter_close_fluksov2(struct meter *mtr);
 size_t meter_read_fluksov2(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/random.h b/include/protocols/random.h
index 8b04cf6..9c8ce2c 100644
--- a/include/protocols/random.h
+++ b/include/protocols/random.h
@@ -38,6 +38,7 @@ struct reading;
 double ltqnorm(double p);
 
 int meter_init_random(struct meter *mtr, list_t options);
+void meter_free_random(struct meter *mtr);
 int meter_open_random(struct meter *mtr);
 int meter_close_random(struct meter *mtr);
 size_t meter_read_random(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/s0.h b/include/protocols/s0.h
index 27e7b73..eaf9c93 100644
--- a/include/protocols/s0.h
+++ b/include/protocols/s0.h
@@ -41,6 +41,7 @@ struct meter;
 struct reading;
 
 int meter_init_s0(struct meter *mtr, list_t options);
+void meter_free_s0(struct meter *mtr);
 int meter_open_s0(struct meter *mtr);
 int meter_close_s0(struct meter *mtr);
 size_t meter_read_s0(struct meter *mtr, struct reading *rds, size_t n);
diff --git a/include/protocols/sml.h b/include/protocols/sml.h
index 9169a5e..15f88ea 100644
--- a/include/protocols/sml.h
+++ b/include/protocols/sml.h
@@ -61,6 +61,13 @@ struct reading;
  */
 int meter_init_sml(struct meter *mtr, list_t options);
 
+/**
+ * Freeing allocated resources during initialization
+ *
+ * @param mtr the meter structure
+ */
+void meter_free_sml(struct meter *mtr);
+
 /**
  * Open connection via serial port or socket to meter
  *
diff --git a/src/meter.c b/src/meter.c
index fa2a116..129801e 100644
--- a/src/meter.c
+++ b/src/meter.c
@@ -29,7 +29,7 @@
 #include "meter.h"
 #include "options.h"
 
-#define METER_DETAIL(NAME, DESC, MAX_RDS, PERIODIC) { meter_protocol_##NAME, #NAME, DESC, MAX_RDS, PERIODIC, meter_init_##NAME, meter_open_##NAME, meter_close_##NAME, meter_read_##NAME }
+#define METER_DETAIL(NAME, DESC, MAX_RDS, PERIODIC) { meter_protocol_##NAME, #NAME, DESC, MAX_RDS, PERIODIC, meter_init_##NAME, meter_free_##NAME, meter_open_##NAME, meter_close_##NAME, meter_read_##NAME }
 
 static const meter_details_t protocols[] = {
 /*	     alias	description						max_rds	periodic
@@ -77,14 +77,9 @@ int meter_init(meter_t *mtr, list_t options) {
 	return details->init_func(mtr, options);
 }
 
-int meter_lookup_protocol(const char* name, meter_protocol_t *protocol) {
-	for (const meter_details_t *it = meter_get_protocols(); it != NULL; it++) {
-		if (strcmp(it->name, name) == 0) {
-			*protocol = it->id;
-			return SUCCESS;
-		}
-	}
-	return ERR_NOT_FOUND;
+void meter_free(meter_t *mtr) {
+	const meter_details_t *details = meter_get_details(mtr->protocol);
+	return details->free_func(mtr);
 }
 
 int meter_open(meter_t *mtr) {
@@ -102,6 +97,16 @@ size_t meter_read(meter_t *mtr, reading_t rds[], size_t n) {
 	return details->read_func(mtr, rds, n);
 }
 
+int meter_lookup_protocol(const char* name, meter_protocol_t *protocol) {
+	for (const meter_details_t *it = meter_get_protocols(); it != NULL; it++) {
+		if (strcmp(it->name, name) == 0) {
+			*protocol = it->id;
+			return SUCCESS;
+		}
+	}
+	return ERR_NOT_FOUND;
+}
+
 const meter_details_t * meter_get_protocols() {
 	return protocols;
 }
diff --git a/src/protocols/d0.c b/src/protocols/d0.c
index 8708066..6dc1af4 100644
--- a/src/protocols/d0.c
+++ b/src/protocols/d0.c
@@ -98,6 +98,18 @@ int meter_init_d0(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_d0(meter_t *mtr) {
+	meter_handle_d0_t *handle = &mtr->handle.d0;
+
+	if (handle->device != NULL) {
+		free(handle->device);
+	}
+
+	if (handle->host != NULL) {
+		free(handle->host);
+	}
+}
+
 int meter_open_d0(meter_t *mtr) {
 	meter_handle_d0_t *handle = &mtr->handle.d0;
 
diff --git a/src/protocols/exec.c b/src/protocols/exec.c
index 585af97..839a35f 100644
--- a/src/protocols/exec.c
+++ b/src/protocols/exec.c
@@ -62,6 +62,16 @@ int meter_init_exec(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_exec(meter_t *mtr) {
+	meter_handle_exec_t *handle = &mtr->handle.exec;
+
+	free(handle->command);
+
+	if (handle->format != NULL) {
+		free(handle->format);
+	}
+}
+
 int meter_open_exec(meter_t *mtr) {
 	//meter_handle_exec_t *handle = &mtr->handle.exec;
 
diff --git a/src/protocols/file.c b/src/protocols/file.c
index c111738..37be9e6 100644
--- a/src/protocols/file.c
+++ b/src/protocols/file.c
@@ -126,6 +126,16 @@ int meter_init_file(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_file(meter_t *mtr) {
+	meter_handle_file_t *handle = &mtr->handle.file;
+
+	free(handle->path);
+
+	if (handle->format != NULL) {
+		free(handle->format);
+	}
+}
+
 int meter_open_file(meter_t *mtr) {
 	meter_handle_file_t *handle = &mtr->handle.file;
 
diff --git a/src/protocols/fluksov2.c b/src/protocols/fluksov2.c
index 6109fe8..36dbb5d 100644
--- a/src/protocols/fluksov2.c
+++ b/src/protocols/fluksov2.c
@@ -41,12 +41,18 @@ int meter_init_fluksov2(meter_t *mtr, list_t options) {
 		handle->fifo = strdup(fifo);
 	}
 	else {
-		handle->fifo = "/var/run/spid/delta/out"; /* use default path */
+		handle->fifo = strdup(FLUKSOV2_DEFAULT_FIFO); /* use default path */
 	}
 
 	return SUCCESS;
 }
 
+void meter_free_fluksov2(meter_t *mtr) {
+	meter_handle_fluksov2_t *handle = &mtr->handle.fluksov2;
+
+	free(handle->fifo);
+}
+
 int meter_open_fluksov2(meter_t *mtr) {
 	meter_handle_fluksov2_t *handle = &mtr->handle.fluksov2;
 
diff --git a/src/protocols/random.c b/src/protocols/random.c
index 2b191b2..c00238f 100644
--- a/src/protocols/random.c
+++ b/src/protocols/random.c
@@ -55,6 +55,10 @@ int meter_init_random(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_random(meter_t *mtr) {
+	//meter_handle_random_t *handle = &mtr->handle.random;
+}
+
 int meter_open_random(meter_t *mtr) {
 	//meter_handle_random_t *handle = &mtr->handle.random;
 
diff --git a/src/protocols/s0.c b/src/protocols/s0.c
index 31edc16..a4c53f4 100644
--- a/src/protocols/s0.c
+++ b/src/protocols/s0.c
@@ -59,6 +59,12 @@ int meter_init_s0(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_s0(meter_t *mtr) {
+	meter_handle_s0_t *handle = &mtr->handle.s0;
+
+	free(handle->device);
+}
+
 int meter_open_s0(meter_t *mtr) {
 	meter_handle_s0_t *handle = &mtr->handle.s0;
 
diff --git a/src/protocols/sml.c b/src/protocols/sml.c
index d3ccaa2..9e90d84 100644
--- a/src/protocols/sml.c
+++ b/src/protocols/sml.c
@@ -104,6 +104,18 @@ int meter_init_sml(meter_t *mtr, list_t options) {
 	return SUCCESS;
 }
 
+void meter_free_sml(meter_t *mtr) {
+	meter_handle_sml_t *handle = &mtr->handle.sml;
+
+	if (handle->device != NULL) {
+		free(handle->device);
+	}
+
+	if (handle->host != NULL) {
+		free(handle->host);
+	}
+}
+
 int meter_open_sml(meter_t *mtr) {
 	meter_handle_sml_t *handle = &mtr->handle.sml;