diff --git a/main/TPS546.c b/main/TPS546.c
index b8fc541a..a112b025 100644
--- a/main/TPS546.c
+++ b/main/TPS546.c
@@ -321,8 +321,8 @@ static uint16_t float_2_ulinear16(float value)
 int TPS546_init(void)
 {
 	uint8_t data[7];
-    uint8_t u8_value;
-    uint16_t u16_value;
+    uint8_t u8_value = 0;
+    uint16_t u16_value = 0;
     uint8_t read_mfr_revision[4];
     int temp;
     uint8_t comp_config[5];
@@ -569,7 +569,7 @@ void TPS546_write_entire_config(void)
 
 int TPS546_get_frequency(void)
 {
-    uint16_t value;
+    uint16_t value = 0;
     int freq;
 
     smb_read_word(PMBUS_FREQUENCY_SWITCH, &value);
@@ -580,7 +580,7 @@ int TPS546_get_frequency(void)
 
 void TPS546_set_frequency(int newfreq)
 {
-    uint16_t value;
+    uint16_t value = 0;
     //int freq;
 
     ESP_LOGI(TAG, "Writing new frequency: %d", newfreq);
@@ -595,7 +595,7 @@ void TPS546_set_frequency(int newfreq)
 
 int TPS546_get_temperature(void)
 {
-    uint16_t value;
+    uint16_t value = 0;
     int temp;
 
     smb_read_word(PMBUS_READ_TEMPERATURE_1, &value);
@@ -605,7 +605,7 @@ int TPS546_get_temperature(void)
 
 float TPS546_get_vin(void)
 {
-    uint16_t u16_value;
+    uint16_t u16_value = 0;
     float vin;
 
     /* Get voltage input (ULINEAR16) */
@@ -623,7 +623,7 @@ float TPS546_get_vin(void)
 
 float TPS546_get_iout(void)
 {
-    uint16_t u16_value;
+    uint16_t u16_value = 0;
     float iout;
 
     /* Get current output (SLINEAR11) */
@@ -643,7 +643,7 @@ float TPS546_get_iout(void)
 
 float TPS546_get_vout(void)
 {
-    uint16_t u16_value;
+    uint16_t u16_value = 0;
     float vout;
 
     /* Get voltage output (ULINEAR16) */
@@ -660,8 +660,8 @@ float TPS546_get_vout(void)
 }
 
 void TPS546_print_status(void) {
-    uint16_t u16_value;
-    uint8_t u8_value;
+    uint16_t u16_value = 0;
+    uint8_t u8_value = 0;
 
     if (smb_read_word(PMBUS_STATUS_WORD, &u16_value) != ESP_OK) {
         ESP_LOGE(TAG, "Could not read STATUS_WORD");
@@ -692,7 +692,7 @@ void TPS546_print_status(void) {
 **/
 void TPS546_set_vout(float volts)
 {
-    uint16_t value;
+    uint16_t value = 0;
 
     if (volts == 0) {
         /* turn off output */
@@ -722,7 +722,7 @@ void TPS546_set_vout(float volts)
 
 void TPS546_show_voltage_settings(void)
 {
-    uint16_t u16_value;
+    uint16_t u16_value = 0;
     float f_value;
 
     ESP_LOGI(TAG, "-----------VOLTAGE---------------------");
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index bff16075..6b6be2ad 100644
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -18,3 +18,5 @@ CONFIG_SPIRAM_MODE_OCT=y
 CONFIG_SPIRAM_SPEED_80M=y
 CONFIG_SPIRAM_IGNORE_NOTFOUND=y
 CONFIG_LOG_COLORS=y
+CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_PERF=y
+CONFIG_COMPILER_OPTIMIZATION_PERF=y
\ No newline at end of file