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 60b94f8..5c34030 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
@@ -1,5 +1,6 @@
 #include "pP_cmd.h"
 #include "pP_volatile.h"
+#include "string.h"
 
 void parseData() {
 
@@ -128,6 +129,7 @@ void serialPrintState() {
 
 void updateParams() {
   serialIncoming = false;
+  strupr(serialMessageIn);
   if (strcmp(serialMessageIn, "GAIN_F") == 0) {
     updateGainFactor(serialLong);
   } else if (strcmp(serialMessageIn, "VFOL") == 0) {
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 4604178..17fe64c 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
@@ -1,5 +1,6 @@
 #include "i2c.h"
 #include "stdint.h"
+#include "string.h"
 
 #define buffSize 40
 bool serialIncoming = false;
@@ -125,6 +126,7 @@ void serialPrintState() {
 
 void updateParams() {
   serialIncoming = false;
+  strupr(serialMessageIn);
   if (strcmp(serialMessageIn, "GAIN_F") == 0) {
     write(CMD_GAIN_F, (uint16_t)serialLong);
   } else if (strcmp(serialMessageIn, "VFOL") == 0) {