diff --git a/libraries/EEPROM/EEPROM.cpp b/libraries/EEPROM/EEPROM.cpp
index 62e15af174d..bc83dbcbd20 100644
--- a/libraries/EEPROM/EEPROM.cpp
+++ b/libraries/EEPROM/EEPROM.cpp
@@ -29,14 +29,14 @@
 
 #include <esp_log.h>
 
-static const char* TAG = "eeprom";
-
 EEPROMClass::EEPROMClass(uint32_t sector)
   : _sector(sector)
   , _data(0)
   , _size(0)
   , _dirty(false)
+  , _mypart(NULL)
   , _name("eeprom")
+  , _user_defined_size(0)
 {
 }
 
@@ -45,6 +45,7 @@ EEPROMClass::EEPROMClass(const char* name, uint32_t user_defined_size)
   , _data(0)
   , _size(0)
   , _dirty(false)
+  , _mypart(NULL)
   , _name(name)
   , _user_defined_size(user_defined_size)
 {
@@ -55,7 +56,9 @@ EEPROMClass::EEPROMClass(void)
   , _data(0)
   , _size(0)
   , _dirty(false)
+  , _mypart(NULL)
   , _name("eeprom")
+  , _user_defined_size(0)
 {
 }
 
@@ -178,85 +181,85 @@ uint16_t EEPROMClass::length ()
 */
 uint8_t EEPROMClass::readByte (int address)
 {
-  uint8_t value;
+  uint8_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 int8_t EEPROMClass::readChar (int address)
 {
-  int8_t value;
+  int8_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 uint8_t EEPROMClass::readUChar (int address)
 {
-  uint8_t value;
+  uint8_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 int16_t EEPROMClass::readShort (int address)
 {
-  int16_t value;
+  int16_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 uint16_t EEPROMClass::readUShort (int address)
 {
-  uint16_t value;
+  uint16_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 int32_t EEPROMClass::readInt (int address)
 {
-  int32_t value;
+  int32_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 uint32_t EEPROMClass::readUInt (int address)
 {
-  uint32_t value;
+  uint32_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 int32_t EEPROMClass::readLong (int address)
 {
-  int32_t value;
+  int32_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 uint32_t EEPROMClass::readULong (int address)
 {
-  uint32_t value;
+  uint32_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 int64_t EEPROMClass::readLong64 (int address)
 {
-  int64_t value;
+  int64_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 uint64_t EEPROMClass::readULong64 (int address)
 {
-  uint64_t value;
+  uint64_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 float_t EEPROMClass::readFloat (int address)
 {
-  float_t value;
+  float_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 double_t EEPROMClass::readDouble (int address)
 {
-  double_t value;
+  double_t value = 0;
   return EEPROMClass::readAll (address, value);
 }
 
 bool EEPROMClass::readBool (int address)
 {
-  int8_t value;
+  int8_t value = 0;
   return EEPROMClass::readAll (address, value) ? 1 : 0;
 }
 
diff --git a/libraries/SD_MMC/src/SD_MMC.cpp b/libraries/SD_MMC/src/SD_MMC.cpp
index 104769693ad..2f36eee7e42 100644
--- a/libraries/SD_MMC/src/SD_MMC.cpp
+++ b/libraries/SD_MMC/src/SD_MMC.cpp
@@ -42,7 +42,21 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit)
     }
     //mount
     sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
-    sdmmc_host_t host = SDMMC_HOST_DEFAULT();
+    sdmmc_host_t host = {
+        .flags = SDMMC_HOST_FLAG_4BIT,
+        .slot = SDMMC_HOST_SLOT_1,
+        .max_freq_khz = SDMMC_FREQ_DEFAULT,
+        .io_voltage = 3.3f,
+        .init = &sdmmc_host_init,
+        .set_bus_width = &sdmmc_host_set_bus_width,
+        .get_bus_width = &sdmmc_host_get_slot_width,
+        .set_card_clk = &sdmmc_host_set_card_clk,
+        .do_transaction = &sdmmc_host_do_transaction,
+        .deinit = &sdmmc_host_deinit,
+        .io_int_enable = sdmmc_host_io_int_enable,
+        .io_int_wait = sdmmc_host_io_int_wait,
+        .command_timeout_ms = 0,
+    };
     host.max_freq_khz = SDMMC_FREQ_HIGHSPEED;
 #ifdef BOARD_HAS_1BIT_SDMMC
     mode1bit = true;
@@ -53,7 +67,8 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit)
 
     esp_vfs_fat_sdmmc_mount_config_t mount_config = {
         .format_if_mount_failed = false,
-        .max_files = 5
+        .max_files = 5,
+        .allocation_unit_size = 0
     };
 
     esp_err_t ret = esp_vfs_fat_sdmmc_mount(mountpoint, &host, &slot_config, &mount_config, &_card);