diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 84bef2d4..e4afe855 100755
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -3,6 +3,8 @@ SRCS
     "adc.c"
     "DS4432U.c"
     "EMC2101.c"
+    "EMC2302.c"
+    "TPS546.c"
     "fonts.c"
     "i2c_master.c"
     "INA260.c"
diff --git a/main/EMC2302.h b/main/EMC2302.h
index 5e950b82..0cfce295 100644
--- a/main/EMC2302.h
+++ b/main/EMC2302.h
@@ -60,17 +60,17 @@
  */
 typedef enum
 {
-    EMC2101_RATE_1_16_HZ, ///< 1_16_HZ
-    EMC2101_RATE_1_8_HZ,  ///< 1_8_HZ
-    EMC2101_RATE_1_4_HZ,  ///< 1_4_HZ
-    EMC2101_RATE_1_2_HZ,  ///< 1_2_HZ
-    EMC2101_RATE_1_HZ,    ///< 1_HZ
-    EMC2101_RATE_2_HZ,    ///< 2_HZ
-    EMC2101_RATE_4_HZ,    ///< 4_HZ
-    EMC2101_RATE_8_HZ,    ///< 8_HZ
-    EMC2101_RATE_16_HZ,   ///< 16_HZ
-    EMC2101_RATE_32_HZ,   ///< 32_HZ
-} emc2101_rate_t;
+    EMC2302_RATE_1_16_HZ, ///< 1_16_HZ
+    EMC2302_RATE_1_8_HZ,  ///< 1_8_HZ
+    EMC2302_RATE_1_4_HZ,  ///< 1_4_HZ
+    EMC2302_RATE_1_2_HZ,  ///< 1_2_HZ
+    EMC2302_RATE_1_HZ,    ///< 1_HZ
+    EMC2302_RATE_2_HZ,    ///< 2_HZ
+    EMC2302_RATE_4_HZ,    ///< 4_HZ
+    EMC2302_RATE_8_HZ,    ///< 8_HZ
+    EMC2302_RATE_16_HZ,   ///< 16_HZ
+    EMC2302_RATE_32_HZ,   ///< 32_HZ
+} emc2302_rate_t;
 
 void EMC2302_init(bool);
 void EMC2302_set_fan_speed(uint8_t, float);
diff --git a/main/TPS546.c b/main/TPS546.c
new file mode 100644
index 00000000..33944f7c
--- /dev/null
+++ b/main/TPS546.c
@@ -0,0 +1,153 @@
+#include "driver/i2c.h"
+#include "esp_log.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <math.h>
+
+#include "pmbus_commands.h"
+#include "TPS546.h"
+
+#define I2C_MASTER_NUM 0 /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
+
+#define WRITE_BIT      I2C_MASTER_WRITE
+#define READ_BIT       I2C_MASTER_READ
+#define ACK_CHECK      true
+#define NO_ACK_CHECK   false
+#define ACK_VALUE      0x0
+#define NACK_VALUE     0x1
+#define MAX_BLOCK_LEN  32
+
+#define SMBUS_DEFAULT_TIMEOUT (1000 / portTICK_PERIOD_MS)
+
+static const char *TAG = "TPS546.c";
+
+
+/**
+ * @brief SMBus read byte
+ */
+esp_err_t smb_read_byte(uint8_t command, uint8_t *data)
+{
+    esp_err_t err = ESP_FAIL;
+
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | WRITE_BIT, ACK_CHECK);
+    i2c_master_write_byte(cmd, command, ACK_CHECK);
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | READ_BIT, ACK_CHECK);
+    i2c_master_read_byte(cmd, data, NACK_VALUE);
+    i2c_master_stop(cmd);
+    ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
+    i2c_cmd_link_delete(cmd);
+
+    return err;
+}
+
+/**
+ * @brief SMBus read word
+ */
+esp_err_t smb_read_word(uint8_t command, uint8_t *data)
+{
+    esp_err_t err = ESP_FAIL;
+
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | WRITE_BIT, ACK_CHECK);
+    i2c_master_write_byte(cmd, command, ACK_CHECK);
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | READ_BIT, ACK_CHECK);
+    i2c_master_read(cmd, &data[0], 1, ACK_VALUE);
+    i2c_master_read_byte(cmd, &data[1], NACK_VALUE);
+    i2c_master_stop(cmd);
+    ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
+    i2c_cmd_link_delete(cmd);
+
+    return err;
+}
+
+/**
+ * @brief SMBus read block
+ */
+static esp_err_t smb_read_block(uint8_t command, uint8_t * data, uint8_t len)
+{
+    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | WRITE_BIT, ACK_CHECK);
+    i2c_master_write_byte(cmd, command, ACK_CHECK);
+    i2c_master_start(cmd);
+    i2c_master_write_byte(cmd, TPS546_I2CADDR << 1 | READ_BIT, ACK_CHECK);
+    uint8_t slave_len = 0;
+    i2c_master_read_byte(cmd, &slave_len, ACK_VALUE);
+    ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
+    i2c_cmd_link_delete(cmd);
+
+    cmd = i2c_cmd_link_create();
+    for (size_t i = 0; i < slave_len - 1; ++i)
+    {
+        i2c_master_read_byte(cmd, &data[i], ACK_VALUE);
+    }
+    i2c_master_read_byte(cmd, &data[slave_len - 1], NACK_VALUE);
+    i2c_master_stop(cmd);
+    ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
+    i2c_cmd_link_delete(cmd);
+
+    return 0;
+}
+
+// Set up the TPS546 regulator and turn it on
+void TPS546_init(void)
+{
+	uint8_t data[6];
+    uint8_t u8_value;
+    uint16_t u16_value;
+    float temp;
+    int mantissa, exponent;
+
+    ESP_LOGI(TAG, "Initializing the core voltage regulator");
+
+    smb_read_block(PMBUS_IC_DEVICE_ID, data, 6);
+    ESP_LOGI(TAG, "Device ID: %02x %02x %02x %02x %02x %02x", data[0], data[1],
+                 data[2], data[3], data[4], data[5]);
+
+    smb_read_byte(PMBUS_REVISION, &u8_value);
+    ESP_LOGI(TAG, "PMBus revision: %02x", u8_value);
+
+    /* Get temperature (SLINEAR11) */
+    ESP_LOGI(TAG, "--------------------------------");
+    smb_read_word(PMBUS_READ_TEMPERATURE_1, data);
+    u16_value = (data[1] << 8) + data[0];
+    ESP_LOGI(TAG, "Temperature raw: %04x", u16_value);
+    if (u16_value & 0x400) {
+        // mantissa is negative
+        mantissa = -1 * ((~u16_value & 0x07FF) + 1);
+    } else {
+        mantissa = (u16_value & 0x07FF);
+    }
+    if (u16_value & 0x8000) {
+        // exponent is negative
+        exponent = -1 * (((~u16_value >> 11) & 0x001F) + 1);
+    } else {
+        exponent = (u16_value >> 11);
+    }
+    ESP_LOGI(TAG, "exp: %04x, mant: %04x", exponent, mantissa);
+    temp = mantissa * powf(2.0, exponent);
+    ESP_LOGI(TAG, "Temp: %2.1f", temp);
+
+    /* Get voltage setting (ULINEAR16) */
+    ESP_LOGI(TAG, "--------------------------------");
+    smb_read_byte(PMBUS_VOUT_MODE, &u8_value);
+    //ESP_LOGI(TAG, "VOUT mode: %02x", u8_value);
+    float mode_exponent = -1 * ((~u8_value & 0x1F) + 1);
+    //ESP_LOGI(TAG, "mode_exponent: %f", mode_exponent);
+
+    smb_read_word(PMBUS_VOUT_COMMAND, data);
+    u16_value = (data[1] << 8) + data[0];
+    //ESP_LOGI(TAG, "VOUT: %d", u16_value);
+    float scaler = powf(2.0, mode_exponent);
+    //ESP_LOGI(TAG, "scaler: %f", scaler);
+    int voltage = (u16_value * scaler) * 1000;
+    ESP_LOGI(TAG, "Vout: %d mV", voltage);
+
+}
+
+
diff --git a/main/TPS546.h b/main/TPS546.h
new file mode 100644
index 00000000..60d4fc66
--- /dev/null
+++ b/main/TPS546.h
@@ -0,0 +1,13 @@
+#ifndef TPS546_H_
+#define TPS546_H_
+
+#define TPS546_I2CADDR          0x24 ///< TPS546 i2c address
+#define TPS546_MANUFACTURER_ID 0xFE  ///< Manufacturer ID
+#define TPS546_REVISION 0xFF         ///< Chip revision
+
+
+void TPS546_init(void);
+//void TPS546_set_voltage(float);
+//void TPS546_get_status(void);
+
+#endif /* TPS546_H_ */
diff --git a/main/global_state.h b/main/global_state.h
index b8aa95f3..c2e2ef28 100644
--- a/main/global_state.h
+++ b/main/global_state.h
@@ -23,6 +23,7 @@ typedef enum
     DEVICE_MAX = 0,
     DEVICE_ULTRA,
     DEVICE_SUPRA,
+    DEVICE_HEX,
 } DeviceModel;
 
 typedef enum
@@ -103,4 +104,4 @@ typedef struct
 
 } GlobalState;
 
-#endif /* GLOBAL_STATE_H_ */
\ No newline at end of file
+#endif /* GLOBAL_STATE_H_ */
diff --git a/main/pmbus_commands.h b/main/pmbus_commands.h
index 060352f2..761c804d 100644
--- a/main/pmbus_commands.h
+++ b/main/pmbus_commands.h
@@ -57,7 +57,7 @@
 #define PMBUS_READ_VOUT 0x8B
 #define PMBUS_READ_IOUT 0x8C
 #define PMBUS_READ_TEMPERATURE_1 0x8D
-#define PMBUS_PMBUS_REVISION 0x98
+#define PMBUS_REVISION 0x98
 #define PMBUS_MFR_ID 0x99
 #define PMBUS_MFR_MODEL 0x9A
 #define PMBUS_MFR_REVISION 0x9B
diff --git a/main/system.c b/main/system.c
index 8daf6d86..5172d3f7 100644
--- a/main/system.c
+++ b/main/system.c
@@ -4,6 +4,7 @@
 
 #include "i2c_master.h"
 #include "EMC2101.h"
+#include "EMC2302.h"
 #include "INA260.h"
 #include "adc.h"
 #include "connect.h"
@@ -90,8 +91,15 @@ static void _init_system(GlobalState * GLOBAL_STATE)
     switch (GLOBAL_STATE->device_model) {
         case DEVICE_MAX:
         case DEVICE_ULTRA:
-        case DEVICE_SUPRA:
+        case DEVICE_ULTRA:
             EMC2101_init(nvs_config_get_u16(NVS_CONFIG_INVERT_FAN_POLARITY, 1));
+            EMC2101_set_fan_speed(1);
+            break;
+        case DEVICE_HEX:
+            // Fan Tests
+            EMC2302_init(nvs_config_get_u16(NVS_CONFIG_INVERT_FAN_POLARITY, 1));
+            EMC2302_set_fan_speed(0, (float) nvs_config_get_u16(NVS_CONFIG_FAN_SPEED, 100) / 100);
+            EMC2302_set_fan_speed(1, (float) nvs_config_get_u16(NVS_CONFIG_FAN_SPEED, 100) / 100);
             break;
         default:
     }
diff --git a/main/vcore.c b/main/vcore.c
index c2ff5a73..ab4267fe 100644
--- a/main/vcore.c
+++ b/main/vcore.c
@@ -5,6 +5,7 @@
 #include "vcore.h"
 #include "adc.h"
 #include "DS4432U.h"
+#include "TPS546.h"
 
 #define TPS40305_VFB 0.6
 
@@ -20,7 +21,10 @@
 
 static const char *TAG = "vcore.c";
 
-void VCORE_init(GlobalState * global_state) {
+void VCORE_init(GlobalState global_state) {
+    if (global_state.device_model == DEVICE_HEX) {
+        TPS546_init();
+    }
     ADC_init();
 }