diff --git a/src/hal/interface/storage.h b/src/hal/interface/storage.h
index e55bdfe022..afd556198b 100644
--- a/src/hal/interface/storage.h
+++ b/src/hal/interface/storage.h
@@ -62,7 +62,7 @@ bool storageTest();
  * 
  * @return true in case of success, false otherwise.
  */
-bool storageStore(char* key, const void* buffer, size_t length);
+bool storageStore(const char* key, const void* buffer, size_t length);
 
 /**
  * Fetch a buffer from the memory at some key.
@@ -75,7 +75,7 @@ bool storageStore(char* key, const void* buffer, size_t length);
  *         receiving buffer, and the length of the data in memory. If the key is not found
  *         this function returns 0.
  */
-size_t storageFetch(char *key, void* buffer, size_t length);
+size_t storageFetch(const char *key, void* buffer, size_t length);
 
 /**
  * Deletes and entry from the storage.
@@ -84,4 +84,4 @@ size_t storageFetch(char *key, void* buffer, size_t length);
  * 
  * @return true in case of success. false if the key was not found or if an error occured.
  */
-bool storageDelete(char* key);
+bool storageDelete(const char* key);
diff --git a/src/hal/src/storage.c b/src/hal/src/storage.c
index 8f0800d69c..70f9d53959 100644
--- a/src/hal/src/storage.c
+++ b/src/hal/src/storage.c
@@ -148,7 +148,7 @@ bool storageTest()
   return pass;
 }
 
-bool storageStore(char* key, const void* buffer, size_t length)
+bool storageStore(const char* key, const void* buffer, size_t length)
 {
   if (!isInit) {
     return false;
@@ -163,7 +163,7 @@ bool storageStore(char* key, const void* buffer, size_t length)
   return result;
 }
 
-size_t storageFetch(char *key, void* buffer, size_t length)
+size_t storageFetch(const char *key, void* buffer, size_t length)
 {
   if (!isInit) {
     return 0;
@@ -178,7 +178,7 @@ size_t storageFetch(char *key, void* buffer, size_t length)
   return result;
 }
 
-bool storageDelete(char* key)
+bool storageDelete(const char* key)
 {
   if (!isInit) {
     return false;
diff --git a/src/modules/interface/console.h b/src/modules/interface/console.h
index 1035a5012b..deb7e7c806 100644
--- a/src/modules/interface/console.h
+++ b/src/modules/interface/console.h
@@ -63,7 +63,7 @@ int consolePutcharFromISR(int ch);
  * @param str Null terminated string
  * @return a nonnegative number on success, or EOF on error.
  */
-int consolePuts(char *str);
+int consolePuts(const char *str);
 
 /**
  * Flush the console buffer
diff --git a/src/modules/interface/log.h b/src/modules/interface/log.h
index 0da105b811..82eec14669 100644
--- a/src/modules/interface/log.h
+++ b/src/modules/interface/log.h
@@ -51,7 +51,7 @@ typedef uint16_t logVarId_t;
  * @param name Name of the variable
  * @return The variable ID or an invalid ID. Use logVarIdIsValid() to check validity.
  */
-logVarId_t logGetVarId(char* group, char* name);
+logVarId_t logGetVarId(const char* group, const char* name);
 
 /** Check variable ID validity
  *
diff --git a/src/modules/interface/param.h b/src/modules/interface/param.h
index 12efcf25fa..37a2f3fdcf 100644
--- a/src/modules/interface/param.h
+++ b/src/modules/interface/param.h
@@ -54,7 +54,7 @@ typedef struct paramVarId_s {
  * @param name Name of the variable
  * @return The variable ID or an invalid ID. Use PARAM_VARID_IS_VALID() to check validity.
  */
-paramVarId_t paramGetVarId(char* group, char* name);
+paramVarId_t paramGetVarId(const char* group, const char* name);
 
 /** Check variable ID validity
  *
diff --git a/src/modules/src/console.c b/src/modules/src/console.c
index 5ebc2b25aa..269163a68d 100644
--- a/src/modules/src/console.c
+++ b/src/modules/src/console.c
@@ -148,7 +148,7 @@ int consolePutcharFromISR(int ch) {
   return ch;
 }
 
-int consolePuts(char *str)
+int consolePuts(const char *str)
 {
   int ret = 0;
 
diff --git a/src/modules/src/log.c b/src/modules/src/log.c
index f56da9236c..2564b04431 100644
--- a/src/modules/src/log.c
+++ b/src/modules/src/log.c
@@ -971,7 +971,7 @@ static void logReset(void)
 /* Public API to access log TOC from within the copter */
 static logVarId_t invalidVarId = 0xffffu;
 
-logVarId_t logGetVarId(char* group, char* name)
+logVarId_t logGetVarId(const char* group, const char* name)
 {
   int i;
   logVarId_t varId = invalidVarId;
diff --git a/src/modules/src/param.c b/src/modules/src/param.c
index 116b50c4dd..97549a0eb7 100644
--- a/src/modules/src/param.c
+++ b/src/modules/src/param.c
@@ -553,7 +553,7 @@ static int variableGetIndex(int id)
 /* Public API to access param TOC from within the copter */
 static paramVarId_t invalidVarId = {0xffffu, 0xffffu};
 
-paramVarId_t paramGetVarId(char* group, char* name)
+paramVarId_t paramGetVarId(const char* group, const char* name)
 {
   int ptr;
   int id = 0;
diff --git a/src/utils/interface/kve/kve.h b/src/utils/interface/kve/kve.h
index 0f37fb96a8..3483033e5b 100644
--- a/src/utils/interface/kve/kve.h
+++ b/src/utils/interface/kve/kve.h
@@ -35,11 +35,11 @@
 
 void kveDefrag(kveMemory_t *kve);
 
-bool kveStore(kveMemory_t *kve, char* key, const void* buffer, size_t length);
+bool kveStore(kveMemory_t *kve, const char* key, const void* buffer, size_t length);
 
 size_t kveFetch(kveMemory_t *kve, const char* key, void* buffer, size_t bufferLength);
 
-bool kveDelete(kveMemory_t *kve, char* key);
+bool kveDelete(kveMemory_t *kve, const char* key);
 
 void kveFormat(kveMemory_t *kve);
 
diff --git a/src/utils/src/kve/kve.c b/src/utils/src/kve/kve.c
index b49dc2af4e..164cecb979 100644
--- a/src/utils/src/kve/kve.c
+++ b/src/utils/src/kve/kve.c
@@ -89,7 +89,7 @@ void kveDefrag(kveMemory_t *kve) {
     }
 }
 
-bool kveStore(kveMemory_t *kve, char* key, const void* buffer, size_t length) {
+bool kveStore(kveMemory_t *kve, const char* key, const void* buffer, size_t length) {
     size_t itemAddress;
 
     // Search if the key is already present in the table
@@ -127,7 +127,7 @@ size_t kveFetch(kveMemory_t *kve, const char* key, void* buffer, size_t bufferLe
     return 0;
 }
 
-bool kveDelete(kveMemory_t *kve, char* key) {
+bool kveDelete(kveMemory_t *kve, const char* key) {
     size_t itemAddress = kveStorageFindItemByKey(kve, FIRST_ITEM_ADDRESS, key);
 
     if (KVE_STORAGE_IS_VALID(itemAddress)) {