diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
index a070da2..9a62d52 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
@@ -15,7 +15,7 @@
  * PB7 PCINT7 (Gain Adjustment Resistor 1 'D21')
  * PD5 T1 (Gain Adjustment Resistor 2 'D5')
  * PD6 PCINT22 (Gain Adjustment Resistor 3 'D6')
- * PB0 PCINT0 (VCC Adjustment Resistors 'D8')
+ * PB0 PCINT0 (Signal voltage Adjustment Resistors 'D8')
  * PB1 OC1A (Comparator VRef PWM Out 'D9')
  * PD3 OC2B (Voltage Follower VRef PWM Out 'D3')
 
@@ -37,7 +37,7 @@ To change trigger active duration: TRG_D [integer for milliseconds]
 To change gain factor: GAIN_F [integer for gain state - see note*]
 To change the output logic: LOGIC [0|1] (0 for active low, 1 for active high)
 To enable piezo plugged detection: PZDET [0|1] (0 for disabled, 1 for enabled)
-To set the sensor's output voltage: VCCSW [0|1] (0 for 3.3v, 1 for 5v)
+To set the sensor's output voltage: SIGVOL [0|1] (0 for 3.3v, 1 for 5v)
 To change ADC hysteresis value: HYST [integer in millivolts]
 To change sensor input pullup vRef low threshold: VFOL [integer in millivolts]
 To change comparator trigger high threshold: VCOMP [integer in millivolts]
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.cpp
index 3284c1b..ec76c71 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.cpp
@@ -81,10 +81,10 @@ void updatePzDet(int value) {
 
 /*------------------------------------------------*/
 
-void updateVccSwitch(int value) {
+void updateSigVoltage(int value) {
   if (value >= 0) {
-    VCCSW = value;
-    EEPROM.put(VCCSW_ADDRESS, VCCSW);
+    SIGVOL = value;
+    EEPROM.put(SIGVOL_ADDRESS, SIGVOL);
   }
 }
 
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.h
index a38149c..51d7b6e 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_cmd.h
@@ -9,7 +9,7 @@ void updateTrigDuration(int value);
 void updateHysteresis(int value);
 void updateLogic(int value);
 void updatePzDet(int value);
-void updateVccSwitch(int value);
+void updateSigVoltage(int value);
 void updateConstant(long value);
 void adjustConstant(int value);
 void updateDebug(int value);
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.cpp
index b681de5..3607b90 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.cpp
@@ -10,7 +10,7 @@ int TRG_DUR = TRG_DUR_DEFAULT;
 int Hyst = HYST_DEFAULT;
 int LOGIC = LOGIC_DEFAULT;
 int PZDET = PZDET_DEFAULT;
-int VCCSW = VCCSW_DEFAULT;
+int SIGVOL = SIGVOL_DEFAULT;
 int Debug = 0;
 long voltMeterConstant = VM_CONST_DEFAULT;
 uint8_t pP_i2c_address = 0x10;
@@ -29,7 +29,7 @@ void eraseEEPROM() {
   EEPROM.put(HYST_ADDRESS, Hyst);
   EEPROM.put(PZDET_ADDRESS, PZDET);
   EEPROM.put(LOGIC_ADDRESS, LOGIC);
-  EEPROM.put(VCCSW_ADDRESS, VCCSW);
+  EEPROM.put(SIGVOL_ADDRESS, SIGVOL);
   EEPROM.put(VM_CONST_ADDRESS, voltMeterConstant);
 }
 
@@ -97,11 +97,11 @@ void restoreConfig() {
     LOGIC = temp;
   }
 
-  EEPROM.get(VCCSW_ADDRESS, temp);
+  EEPROM.get(SIGVOL_ADDRESS, temp);
   if (temp < 0 || temp > 1) {
     erase = true;
   } else {
-    VCCSW = temp;
+    SIGVOL = temp;
   }
 
   long longTemp;
@@ -131,7 +131,7 @@ void setDefaultConfig() {
   Hyst = HYST_DEFAULT;
   PZDET = PZDET_DEFAULT;
   LOGIC = LOGIC_DEFAULT;
-  VCCSW = VCCSW_DEFAULT;
+  SIGVOL = SIGVOL_DEFAULT;
   voltMeterConstant = VM_CONST_DEFAULT;
   adjustFollow();
   adjustComp();
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.h
index cbdcc22..627934e 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_config.h
@@ -41,9 +41,9 @@ extern int LOGIC; // Trigger logic scheme, Active LOW is default
 #define PZDET_ADDRESS 26
 extern int PZDET; // Enable or disable piezo connection detection, default is off
 
-#define VCCSW_DEFAULT 0
-#define VCCSW_ADDRESS 28
-extern int VCCSW; // Set the signal output to 3.3v [0] or 5v logic [1]
+#define SIGVOL_DEFAULT 1
+#define SIGVOL_ADDRESS 28
+extern int SIGVOL; // Set the signal output to 3.3v [0] or 5v logic [1]
 
 extern int Debug;
 
@@ -55,7 +55,7 @@ extern long voltMeterConstant; // For fine tuning input voltage sense
 extern uint8_t pP_i2c_address;
 
 #ifndef PP_VERSION
-    #define PP_VERSION "2.3.1"
+    #define PP_VERSION "2.3.2"
 #endif // PP_VERSION fallback if python script fails
 
 void eraseEEPROM();
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.cpp
index 288efe1..1efcf02 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.cpp
@@ -178,14 +178,14 @@ void adjustGain() {
 /*------------------------------------------------*/
 
 void adjustVcc() {
-  switch (VCCSW) {
+  switch (SIGVOL) {
   case 0:
-    pinMode(VCCSW_PIN, OUTPUT);
-    digitalWriteFast(VCCSW_PIN, LOW);
+    pinMode(SIGVOL_PIN, OUTPUT);
+    digitalWriteFast(SIGVOL_PIN, LOW);
     break;
   case 1:
   default:
-    pinMode(VCCSW_PIN, INPUT);
+    pinMode(SIGVOL_PIN, INPUT);
     break;
   }
 }
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c.cpp
index e459006..27e62aa 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c.cpp
@@ -38,7 +38,7 @@ void i2cReportConfig() {
   i2cWrite(buffer, 10, Hyst);
   i2cWrite(buffer, 12, LOGIC);
   i2cWrite(buffer, 14, PZDET);
-  i2cWrite(buffer, 16, VCCSW);
+  i2cWrite(buffer, 16, SIGVOL);
   i2cWrite(buffer, 18, voltMeterConstant);
   memcpy(buffer + 22, PP_VERSION, length - 22);
   #ifdef __AVR_ATmega328P__
@@ -142,8 +142,8 @@ void i2cInput(int bytesReceived) {
     break;
   case CMD_STATE:
     break;
-  case CMD_VCCSW:
-    updateVccSwitch(value);
+  case CMD_SIGVOL:
+    updateSigVoltage(value);
     break;
   case CMD_VCCADJUST:
     adjustConstant(value);
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c_config.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c_config.h
index 510a3c9..9cdd033 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c_config.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_i2c_config.h
@@ -10,5 +10,5 @@
 #define CMD_CONFIG 0x09
 #define CMD_ERASE 0x0a
 #define CMD_STATE 0x0b
-#define CMD_VCCSW 0x0c
+#define CMD_SIGVOL 0x0c
 #define CMD_VCCADJUST 0x0d
\ No newline at end of file
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_pins.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_pins.h
index 57ca5c6..0d5ec5e 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_pins.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_pins.h
@@ -33,7 +33,7 @@ Default pins (based on Rev.2.x.xPCB layout)
 #define V_FOL_PWM 3  // PWM analog output pin for voltage follower adjustment
 #define VCOMP_PWM 9  // PWM analog output pin for comparator adjustment
 #define PZDET_PIN 16 // Digital input pin for detecting piezo connection
-#define VCCSW_PIN 8  // VCC variable regulator switch pin
+#define SIGVOL_PIN 8  // VCC variable regulator switch pin
 
 #endif //__AVR_ATmega328PB__
 
@@ -55,6 +55,6 @@ Default pins (based on Rev.2.x.xPCB layout)
 #define V_FOL_PWM 3  // PD3 PWM analog output pin for voltage follower adjustment
 #define VCOMP_PWM 9  // PB1 PWM analog output pin for comparator adjustment
 #define PZDET_PIN 16 // PC2 Digital input pin for detecting piezo connection
-#define VCCSW_PIN 8  // PB0 VCC variable regulator switch pin
+#define SIGVOL_PIN 8  // PB0 VCC variable regulator switch pin
 
 #endif //__AVR_ATmega328P__
\ No newline at end of file
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_serial.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_serial.h
index 88699d4..87e09a1 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_serial.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_serial.h
@@ -81,9 +81,9 @@ void serialPrintConfig() {
   Serial.print("PZDET ");
   Serial.println(PZDET);
 
-  Serial.print("VCCSW ");
-  Serial.print(VCCSW);
-  switch (VCCSW) {
+  Serial.print("SIGVOL ");
+  Serial.print(SIGVOL);
+  switch (SIGVOL) {
   case 0:
     Serial.println(" 3.3v");
     break;
@@ -146,8 +146,8 @@ void updateParams() {
     updateLogic(serialLong);
   } else if (strcmp(serialMessageIn, "PZDET") == 0) {
     updatePzDet(serialLong);
-  } else if (strcmp(serialMessageIn, "VCCSW") == 0) {
-    updateVccSwitch(serialLong);
+  } else if (strcmp(serialMessageIn, "SIGVOL") == 0) {
+    updateSigVoltage(serialLong);
   } else if (strcmp(serialMessageIn, "CONST") == 0) {
     updateConstant(serialLong);
   } else if (strcmp(serialMessageIn, "VCCADJUST") == 0) {
@@ -172,7 +172,7 @@ void updateParams() {
     Serial.println("  (0 for active low, 1 for active high)");
     Serial.println("To enable piezo plugged detection: PZDET [0|1]");
     Serial.println("  (0 for disabled, 1 for enabled)");
-    Serial.println("To change the main voltage of the circuit: VCCSW [0|1]");
+    Serial.println("To change the main voltage of the circuit: SIGVOL [0|1]");
     Serial.println("  (0 for 3.3v, 1 for 5v)");
     Serial.println("To change ADC hysteresis value: HYST [integer in millivolts]");
     Serial.println("To adjust VCC voltage readings: VCCADJUST [integer in millivolts, use value from multimeter]");
diff --git a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.cpp b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.cpp
index fc36a88..04a5037 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.cpp
@@ -56,7 +56,7 @@ config_t requestConfig() {
   config.Hyst = read16();
   config.LOGIC = read16();
   config.PZDET = read16();
-  config.VCCSW = read16();
+  config.SIGVOL = read16();
   config.voltMeterConstant = read32();
   config.version = Wire.readString();
 
diff --git a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.h b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.h
index 97b79ae..9ed6b71 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/i2c.h
@@ -15,7 +15,7 @@
 #define CMD_CONFIG 0x09
 #define CMD_ERASE 0x0a
 #define CMD_STATE 0x0b
-#define CMD_VCCSW 0x0c
+#define CMD_SIGVOL 0x0c
 #define CMD_VCCADJUST 0x0d
 
 #include "WString.h"
@@ -29,7 +29,7 @@ typedef struct {
   uint16_t Hyst;
   uint16_t LOGIC;
   uint16_t PZDET;
-  uint16_t VCCSW;
+  uint16_t SIGVOL;
   uint32_t voltMeterConstant;
   String version;
 } config_t;
diff --git a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/pP_serial.h b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/pP_serial.h
index 3357a42..a37046e 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/pP_serial.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_i2c_Bridge/src/pP_serial.h
@@ -90,9 +90,9 @@ void serialPrintConfig() {
   Serial.print("PZDET ");
   Serial.println(config.PZDET);
 
-  Serial.print("VCCSW ");
-  Serial.print(config.VCCSW);
-  switch (config.VCCSW) {
+  Serial.print("SIGVOL ");
+  Serial.print(config.SIGVOL);
+  switch (config.SIGVOL) {
   case 0:
     Serial.println(" 3.3v");
     break;
@@ -157,8 +157,8 @@ void updateParams() {
     write(CMD_LOGIC, (uint16_t)serialLong);
   } else if (strcmp(serialMessageIn, "PZDET") == 0) {
     write(CMD_PZDET, (uint16_t)serialLong);
-  } else if (strcmp(serialMessageIn, "VCCSW") == 0) {
-    write(CMD_VCCSW, (uint16_t)serialLong);
+  } else if (strcmp(serialMessageIn, "SIGVOL") == 0) {
+    write(CMD_SIGVOL, (uint16_t)serialLong);
   } else if (strcmp(serialMessageIn, "CONST") == 0) {
     write(CMD_CONST, serialLong);
   } else if (strcmp(serialMessageIn, "VCCADJUST") == 0) {
@@ -181,7 +181,7 @@ void updateParams() {
     Serial.println("  (0 for active low, 1 for active high)");
     Serial.println("To enable piezo plugged detection: PZDET [0|1]");
     Serial.println("  (0 for disabled, 1 for enabled)");
-    Serial.println("To change the main voltage of the circuit: VCCSW [0|1]");
+    Serial.println("To change the main voltage of the circuit: SIGVOL [0|1]");
     Serial.println("  (0 for 3.3v, 1 for 5v)");
     Serial.println("To change ADC hysteresis value: HYST [integer in millivolts]");
     Serial.println("To adjust VCC voltage readings: VCCADJUST [integer in millivolts, use value from multimeter]");